From 6f0cd91423b588fd20a434db7eb0af4580fbda3d Mon Sep 17 00:00:00 2001
From: Rafael Zurita <rafa@fi.uncoma.edu.ar>
Date: Sun, 17 May 2020 23:45:52 -0300
Subject: [PATCH] Compila y llego a nulluser

---
 LICENSE                                  |   20 +
 README.md                                |   34 +
 compile/.defs                            |  318 +++
 compile/.deps                            | 2683 ++++++++++++++++++++++
 compile/.vers_num                        |    1 +
 compile/DAC_OUT_PUT1.txt                 |    1 +
 compile/DAC_OUT_PUT2.txt                 |    1 +
 compile/Makefile                         |  199 ++
 compile/bin/build-make                   |  710 ++++++
 compile/bin/mkvers                       |   27 +
 compile/binaries/getchar.o               |  Bin 0 -> 900 bytes
 compile/binaries/putchar.o               |  Bin 0 -> 900 bytes
 compile/binaries/qsort.o                 |  Bin 0 -> 2024 bytes
 compile/original/Makefile.orig           |  189 ++
 compile/original/flash.sh                |    1 +
 compile/original/ld.script               |  135 ++
 compile/original/ld.script.avr           |  135 ++
 compile/original/ld.script.avr.baremetal |  105 +
 compile/original/ld.script.avr2          |  149 ++
 compile/original/ld.script.stm32         |   55 +
 compile/version                          |    1 +
 compile/xinu.hex                         | 1108 +++++++++
 compile/xinu.map                         | 1332 +++++++++++
 config/Configuration                     |  119 +
 config/Configuration.orig                |  106 +
 config/DESCRIPTION                       |  111 +
 config/Makefile                          |   41 +
 config/conf.c                            |   44 +
 config/conf.h                            |   50 +
 config/config.l                          |   40 +
 config/config.y                          |  754 ++++++
 device/eth/ethcontrol.c                  |   35 +
 device/eth/ethhandler.c                  |  123 +
 device/eth/ethinit.c                     |  403 ++++
 device/eth/ethread.c                     |   69 +
 device/eth/ethwrite.c                    |   84 +
 device/lfs/lfdballoc.c                   |   40 +
 device/lfs/lfdbfree.c                    |   25 +
 device/lfs/lfflush.c                     |   42 +
 device/lfs/lfgetmode.c                   |   61 +
 device/lfs/lfiballoc.c                   |   33 +
 device/lfs/lfibclear.c                   |   22 +
 device/lfs/lfibget.c                     |   31 +
 device/lfs/lfibput.c                     |   43 +
 device/lfs/lflclose.c                    |   38 +
 device/lfs/lflcontrol.c                  |   47 +
 device/lfs/lflgetc.c                     |   52 +
 device/lfs/lflinit.c                     |   46 +
 device/lfs/lflputc.c                     |   64 +
 device/lfs/lflread.c                     |   39 +
 device/lfs/lflseek.c                     |   41 +
 device/lfs/lflwrite.c                    |   29 +
 device/lfs/lfscheck.c                    |   40 +
 device/lfs/lfsckfmt.c                    |   65 +
 device/lfs/lfscreate.c                   |   74 +
 device/lfs/lfsetup.c                     |  122 +
 device/lfs/lfsinit.c                     |   32 +
 device/lfs/lfsopen.c                     |  185 ++
 device/lfs/lftruncate.c                  |  104 +
 device/movidos/gpio/gpiocontrol.c        |   64 +
 device/movidos/gpio/gpiohandler.c        |   85 +
 device/movidos/gpio/gpioinit.c           |   42 +
 device/movidos/gpio/gpioread.c           |   27 +
 device/movidos/gpio/gpioselect.c         |   25 +
 device/movidos/gpio/gpiowrite.c          |   31 +
 device/movidos/ram/ramclose.c            |   14 +
 device/movidos/ram/raminit.c             |   19 +
 device/movidos/ram/ramopen.c             |   19 +
 device/movidos/ram/ramread.c             |   21 +
 device/movidos/ram/ramwrite.c            |   21 +
 device/movidos/tty/ttycontrol.c          |   58 +
 device/movidos/tty/ttygetc.c             |   41 +
 device/movidos/tty/ttyhandle_in.c        |  267 +++
 device/movidos/tty/ttyhandle_out.c       |   83 +
 device/movidos/tty/ttyhandler.c          |  114 +
 device/movidos/tty/ttyinit.c             |   83 +
 device/movidos/tty/ttykickout.c          |   19 +
 device/movidos/tty/ttyputc.c             |   44 +
 device/movidos/tty/ttyread.c             |   68 +
 device/movidos/tty/ttywrite.c            |   29 +
 device/nam/mount.c                       |   76 +
 device/nam/naminit.c                     |   93 +
 device/nam/nammap.c                      |  135 ++
 device/nam/namopen.c                     |   29 +
 device/rds/rdsbufalloc.c                 |   50 +
 device/rds/rdsclose.c                    |   60 +
 device/rds/rdscomm.c                     |  124 +
 device/rds/rdscontrol.c                  |  131 ++
 device/rds/rdsinit.c                     |  108 +
 device/rds/rdsopen.c                     |   93 +
 device/rds/rdsprocess.c                  |  212 ++
 device/rds/rdsread.c                     |  130 ++
 device/rds/rdswrite.c                    |   97 +
 device/rfs/rflclose.c                    |   32 +
 device/rfs/rflgetc.c                     |   23 +
 device/rfs/rflinit.c                     |   29 +
 device/rfs/rflputc.c                     |   19 +
 device/rfs/rflread.c                     |  100 +
 device/rfs/rflseek.c                     |   33 +
 device/rfs/rflwrite.c                    |   97 +
 device/rfs/rfscomm.c                     |   85 +
 device/rfs/rfscontrol.c                  |  114 +
 device/rfs/rfsgetmode.c                  |   63 +
 device/rfs/rfsinit.c                     |   39 +
 device/rfs/rfsndmsg.c                    |   46 +
 device/rfs/rfsopen.c                     |  114 +
 device/spi/spicontrol.c                  |   19 +
 device/spi/spiinit.c                     |   36 +
 device/spi/spiputc.c                     |   21 +
 include/arp.h                            |   50 +
 include/bufpool.h                        |   27 +
 include/clk.h                            |   82 +
 include/cortexm3.h                       |   27 +
 include/ctype.h                          |   33 +
 include/date.h                           |   67 +
 include/debug.h                          |    8 +
 include/delay.h                          |   25 +
 include/device.h                         |    7 +
 include/dhcp.h                           |   58 +
 include/dns.h                            |   61 +
 include/ether.h                          |  116 +
 include/ethloop.h                        |   65 +
 include/file.h                           |   20 +
 include/flash.h                          |  263 +++
 include/gpio.h                           |  154 ++
 include/gpioselect.h                     |  160 ++
 include/icmp.h                           |   31 +
 include/icu.h                            |    9 +
 include/interrupt.h                      |   34 +
 include/ip.h                             |   25 +
 include/kernel.h                         |   95 +
 include/lfilesys.h                       |  176 ++
 include/limits.h                         |   30 +
 include/mark.h                           |   16 +
 include/memory.h                         |   38 +
 include/messages.h                       |   14 +
 include/name.h                           |   22 +
 include/net.h                            |   69 +
 include/ports.h                          |   31 +
 include/process.h                        |   63 +
 include/prototypes.h                     |  633 +++++
 include/queue.h                          |   36 +
 include/ramdisk.h                        |   12 +
 include/rdisksys.h                       |  235 ++
 include/resched.h                        |   16 +
 include/rfilesys.h                       |  292 +++
 include/semaphore.h                      |   22 +
 include/serial_avr.h                     |   21 +
 include/shell.h                          |   77 +
 include/shprototypes.h                   |   74 +
 include/spi.h                            |   37 +
 include/stdarg.h                         |   15 +
 include/stddef.h                         |    7 +
 include/stdio.h                          |   34 +
 include/stdlib.h                         |   19 +
 include/string.h                         |   10 +
 include/syscall.h                        |   60 +
 include/testsuite.h                      |   38 +
 include/tftp.h                           |   67 +
 include/timer.h                          |   37 +
 include/tty.h                            |   84 +
 include/uart.h                           |   45 +
 include/udp.h                            |   33 +
 include/userland.h                       |    6 +
 include/xinu.h                           |   51 +
 lib/ctype_.c                             |   32 +
 lib/doprnt.c                             |  432 ++++
 lib/doscan.c                             |  406 ++++
 lib/messages.c                           |   14 +
 lib/original/abs.c                       |   14 +
 lib/original/atoi.c                      |   34 +
 lib/original/atol.c                      |   35 +
 lib/original/bzero.c                     |   24 +
 lib/original/fdoprnt.c                   |  371 +++
 lib/original/fgetc.c                     |   28 +
 lib/original/fgets.c                     |   43 +
 lib/original/fprintf.c                   |   28 +
 lib/original/fputc.c                     |   30 +
 lib/original/fputs.c                     |   27 +
 lib/original/fscanf.c                    |   69 +
 lib/original/getchar.c                   |   15 +
 lib/original/labs.c                      |   14 +
 lib/original/memchr.c                    |    0
 lib/original/memcmp.c                    |   26 +
 lib/original/memcpy.c                    |   23 +
 lib/original/memset.c                    |   23 +
 lib/original/printf.c                    |   28 +
 lib/original/putchar.c                   |   15 +
 lib/original/qsort.c                     |  162 ++
 lib/original/rand.c                      |   38 +
 lib/original/sprintf.c                   |   43 +
 lib/original/sscanf.c                    |   50 +
 lib/original/strchr.c                    |   27 +
 lib/original/strcmp.c                    |   25 +
 lib/original/strcpy.c                    |   16 +
 lib/original/strlen.c                    |   20 +
 lib/original/strncat.c                   |   28 +
 lib/original/strncmp.c                   |   23 +
 lib/original/strncpy.c                   |   30 +
 lib/original/strnlen.c                   |   20 +
 lib/original/strrchr.c                   |   30 +
 lib/original/strstr.c                    |   38 +
 lib/userland.c                           |   43 +
 lib/userland.c.orig                      |   40 +
 screenshot.png                           |  Bin 0 -> 22649 bytes
 shell.orig/addargs.c                     |   93 +
 shell.orig/lexan.c                       |  148 ++
 shell.orig/shell.c                       |  303 +++
 shell.orig/xsh_argecho.c                 |   21 +
 shell.orig/xsh_cat.c                     |   59 +
 shell.orig/xsh_clear.c                   |   22 +
 shell.orig/xsh_date.c                    |   69 +
 shell.orig/xsh_devdump.c                 |   36 +
 shell.orig/xsh_echo.c                    |   24 +
 shell.orig/xsh_exit.c                    |   13 +
 shell.orig/xsh_help.c                    |  124 +
 shell.orig/xsh_kill.c                    |   66 +
 shell.orig/xsh_memdump.c                 |  165 ++
 shell.orig/xsh_memstat.c                 |  115 +
 shell.orig/xsh_ps.c                      |   69 +
 shell.orig/xsh_rdstest.c                 |  118 +
 shell.orig/xsh_sleep.c                   |   58 +
 shell.orig/xsh_uptime.c                  |   76 +
 shell/addargs.c                          |   93 +
 shell/lexan.c                            |  148 ++
 shell/shell.c                            |   35 +
 system/ascdate.c                         |  231 ++
 system/blink_avr.c                       |   21 +
 system/bufinit.c                         |   16 +
 system/chprio.c                          |   28 +
 system/clkhandler.c                      |   63 +
 system/clkinit.c                         |   63 +
 system/close.c                           |   26 +
 system/control.c                         |   29 +
 system/create.c                          |  118 +
 system/debug.c                           |   78 +
 system/evec.c                            |  150 ++
 system/evec.c.orig                       |  117 +
 system/exit.c                            |   12 +
 system/freebuf.c                         |   39 +
 system/freemem.c                         |   70 +
 system/getbuf.c                          |   43 +
 system/getc.c                            |   26 +
 system/getdev.c                          |   26 +
 system/getitem.c                         |   58 +
 system/getmem.c                          |   50 +
 system/getpid.c                          |   12 +
 system/getprio.c                         |   24 +
 system/getstk.c                          |   52 +
 system/getticks.c                        |   14 +
 system/gettime.c                         |   28 +
 system/init.c                            |   26 +
 system/initialize.c                      |  283 +++
 system/initialize.c.orig                 |  261 +++
 system/insert.c                          |   36 +
 system/insertd.c                         |   42 +
 system/intr.S                            |   60 +
 system/intr.S.orig                       |   60 +
 system/ioerr.c                           |   12 +
 system/ionull.c                          |   12 +
 system/kill.c                            |   59 +
 system/kprintf.c                         |   57 +
 system/main.c                            |   31 +
 system/mark.c                            |   47 +
 system/meminit.c                         |   39 +
 system/mkbufpool.c                       |   55 +
 system/newqueue.c                        |   30 +
 system/open.c                            |   41 +
 system/panic.c                           |   16 +
 system/platinit.c                        |   85 +
 system/ptclear.c                         |   50 +
 system/ptcount.c                         |   44 +
 system/ptcreate.c                        |   46 +
 system/ptdelete.c                        |   27 +
 system/ptinit.c                          |   45 +
 system/ptrecv.c                          |   48 +
 system/ptreset.c                         |   27 +
 system/ptsend.c                          |   60 +
 system/putc.c                            |   27 +
 system/queue.c                           |   52 +
 system/read.c                            |   28 +
 system/ready.c                           |   30 +
 system/receive.c                         |   25 +
 system/recvclr.c                         |   25 +
 system/recvtime.c                        |   45 +
 system/resched.c                         |  146 ++
 system/resched.c.orig                    |  138 ++
 system/resume.c                          |   35 +
 system/seek.c                            |   27 +
 system/semcount.c                        |   26 +
 system/semcreate.c                       |   50 +
 system/semdelete.c                       |   36 +
 system/semreset.c                        |   35 +
 system/send.c                            |   41 +
 system/serial_avr.c                      |  130 ++
 system/signal.c                          |   31 +
 system/signaln.c                         |   37 +
 system/sleep.c                           |   54 +
 system/start.S                           |   53 +
 system/start.S.avr                       |   51 +
 system/start.S.orig                      |   94 +
 system/suspend.c                         |   41 +
 system/syscall.c                         |  102 +
 system/syscall.c.orig                    |  101 +
 system/unsleep.c                         |   47 +
 system/userret.c                         |   12 +
 system/wait.c                            |   39 +
 system/wakeup.c                          |   19 +
 system/write.c                           |   28 +
 system/xdone.c                           |   14 +
 system/yield.c                           |   17 +
 xinu-avr-port.txt                        |   26 +
 312 files changed, 26551 insertions(+)
 create mode 100644 LICENSE
 create mode 100644 README.md
 create mode 100644 compile/.defs
 create mode 100644 compile/.deps
 create mode 100644 compile/.vers_num
 create mode 100644 compile/DAC_OUT_PUT1.txt
 create mode 100644 compile/DAC_OUT_PUT2.txt
 create mode 100644 compile/Makefile
 create mode 100755 compile/bin/build-make
 create mode 100755 compile/bin/mkvers
 create mode 100644 compile/binaries/getchar.o
 create mode 100644 compile/binaries/putchar.o
 create mode 100644 compile/binaries/qsort.o
 create mode 100644 compile/original/Makefile.orig
 create mode 100755 compile/original/flash.sh
 create mode 100644 compile/original/ld.script
 create mode 100644 compile/original/ld.script.avr
 create mode 100644 compile/original/ld.script.avr.baremetal
 create mode 100644 compile/original/ld.script.avr2
 create mode 100644 compile/original/ld.script.stm32
 create mode 100644 compile/version
 create mode 100644 compile/xinu.hex
 create mode 100644 compile/xinu.map
 create mode 100644 config/Configuration
 create mode 100644 config/Configuration.orig
 create mode 100644 config/DESCRIPTION
 create mode 100644 config/Makefile
 create mode 100644 config/conf.c
 create mode 100644 config/conf.h
 create mode 100644 config/config.l
 create mode 100644 config/config.y
 create mode 100644 device/eth/ethcontrol.c
 create mode 100644 device/eth/ethhandler.c
 create mode 100755 device/eth/ethinit.c
 create mode 100755 device/eth/ethread.c
 create mode 100644 device/eth/ethwrite.c
 create mode 100644 device/lfs/lfdballoc.c
 create mode 100644 device/lfs/lfdbfree.c
 create mode 100644 device/lfs/lfflush.c
 create mode 100644 device/lfs/lfgetmode.c
 create mode 100644 device/lfs/lfiballoc.c
 create mode 100644 device/lfs/lfibclear.c
 create mode 100644 device/lfs/lfibget.c
 create mode 100644 device/lfs/lfibput.c
 create mode 100644 device/lfs/lflclose.c
 create mode 100644 device/lfs/lflcontrol.c
 create mode 100644 device/lfs/lflgetc.c
 create mode 100644 device/lfs/lflinit.c
 create mode 100644 device/lfs/lflputc.c
 create mode 100644 device/lfs/lflread.c
 create mode 100644 device/lfs/lflseek.c
 create mode 100644 device/lfs/lflwrite.c
 create mode 100644 device/lfs/lfscheck.c
 create mode 100644 device/lfs/lfsckfmt.c
 create mode 100644 device/lfs/lfscreate.c
 create mode 100644 device/lfs/lfsetup.c
 create mode 100644 device/lfs/lfsinit.c
 create mode 100644 device/lfs/lfsopen.c
 create mode 100644 device/lfs/lftruncate.c
 create mode 100644 device/movidos/gpio/gpiocontrol.c
 create mode 100644 device/movidos/gpio/gpiohandler.c
 create mode 100644 device/movidos/gpio/gpioinit.c
 create mode 100644 device/movidos/gpio/gpioread.c
 create mode 100644 device/movidos/gpio/gpioselect.c
 create mode 100644 device/movidos/gpio/gpiowrite.c
 create mode 100644 device/movidos/ram/ramclose.c
 create mode 100644 device/movidos/ram/raminit.c
 create mode 100644 device/movidos/ram/ramopen.c
 create mode 100644 device/movidos/ram/ramread.c
 create mode 100644 device/movidos/ram/ramwrite.c
 create mode 100644 device/movidos/tty/ttycontrol.c
 create mode 100644 device/movidos/tty/ttygetc.c
 create mode 100644 device/movidos/tty/ttyhandle_in.c
 create mode 100644 device/movidos/tty/ttyhandle_out.c
 create mode 100644 device/movidos/tty/ttyhandler.c
 create mode 100644 device/movidos/tty/ttyinit.c
 create mode 100644 device/movidos/tty/ttykickout.c
 create mode 100644 device/movidos/tty/ttyputc.c
 create mode 100644 device/movidos/tty/ttyread.c
 create mode 100644 device/movidos/tty/ttywrite.c
 create mode 100644 device/nam/mount.c
 create mode 100644 device/nam/naminit.c
 create mode 100644 device/nam/nammap.c
 create mode 100644 device/nam/namopen.c
 create mode 100644 device/rds/rdsbufalloc.c
 create mode 100644 device/rds/rdsclose.c
 create mode 100644 device/rds/rdscomm.c
 create mode 100644 device/rds/rdscontrol.c
 create mode 100644 device/rds/rdsinit.c
 create mode 100644 device/rds/rdsopen.c
 create mode 100644 device/rds/rdsprocess.c
 create mode 100644 device/rds/rdsread.c
 create mode 100644 device/rds/rdswrite.c
 create mode 100644 device/rfs/rflclose.c
 create mode 100644 device/rfs/rflgetc.c
 create mode 100644 device/rfs/rflinit.c
 create mode 100644 device/rfs/rflputc.c
 create mode 100644 device/rfs/rflread.c
 create mode 100644 device/rfs/rflseek.c
 create mode 100644 device/rfs/rflwrite.c
 create mode 100644 device/rfs/rfscomm.c
 create mode 100644 device/rfs/rfscontrol.c
 create mode 100644 device/rfs/rfsgetmode.c
 create mode 100644 device/rfs/rfsinit.c
 create mode 100644 device/rfs/rfsndmsg.c
 create mode 100644 device/rfs/rfsopen.c
 create mode 100644 device/spi/spicontrol.c
 create mode 100644 device/spi/spiinit.c
 create mode 100644 device/spi/spiputc.c
 create mode 100644 include/arp.h
 create mode 100644 include/bufpool.h
 create mode 100644 include/clk.h
 create mode 100644 include/cortexm3.h
 create mode 100644 include/ctype.h
 create mode 100644 include/date.h
 create mode 100644 include/debug.h
 create mode 100644 include/delay.h
 create mode 100644 include/device.h
 create mode 100644 include/dhcp.h
 create mode 100644 include/dns.h
 create mode 100644 include/ether.h
 create mode 100644 include/ethloop.h
 create mode 100644 include/file.h
 create mode 100644 include/flash.h
 create mode 100644 include/gpio.h
 create mode 100644 include/gpioselect.h
 create mode 100644 include/icmp.h
 create mode 100644 include/icu.h
 create mode 100644 include/interrupt.h
 create mode 100644 include/ip.h
 create mode 100644 include/kernel.h
 create mode 100644 include/lfilesys.h
 create mode 100644 include/limits.h
 create mode 100644 include/mark.h
 create mode 100644 include/memory.h
 create mode 100644 include/messages.h
 create mode 100644 include/name.h
 create mode 100644 include/net.h
 create mode 100644 include/ports.h
 create mode 100644 include/process.h
 create mode 100644 include/prototypes.h
 create mode 100644 include/queue.h
 create mode 100644 include/ramdisk.h
 create mode 100644 include/rdisksys.h
 create mode 100644 include/resched.h
 create mode 100644 include/rfilesys.h
 create mode 100644 include/semaphore.h
 create mode 100644 include/serial_avr.h
 create mode 100644 include/shell.h
 create mode 100644 include/shprototypes.h
 create mode 100644 include/spi.h
 create mode 100644 include/stdarg.h
 create mode 100644 include/stddef.h
 create mode 100644 include/stdio.h
 create mode 100644 include/stdlib.h
 create mode 100644 include/string.h
 create mode 100644 include/syscall.h
 create mode 100644 include/testsuite.h
 create mode 100644 include/tftp.h
 create mode 100644 include/timer.h
 create mode 100644 include/tty.h
 create mode 100644 include/uart.h
 create mode 100644 include/udp.h
 create mode 100644 include/userland.h
 create mode 100644 include/xinu.h
 create mode 100644 lib/ctype_.c
 create mode 100644 lib/doprnt.c
 create mode 100644 lib/doscan.c
 create mode 100644 lib/messages.c
 create mode 100644 lib/original/abs.c
 create mode 100644 lib/original/atoi.c
 create mode 100644 lib/original/atol.c
 create mode 100644 lib/original/bzero.c
 create mode 100644 lib/original/fdoprnt.c
 create mode 100644 lib/original/fgetc.c
 create mode 100644 lib/original/fgets.c
 create mode 100644 lib/original/fprintf.c
 create mode 100644 lib/original/fputc.c
 create mode 100644 lib/original/fputs.c
 create mode 100644 lib/original/fscanf.c
 create mode 100644 lib/original/getchar.c
 create mode 100644 lib/original/labs.c
 create mode 100644 lib/original/memchr.c
 create mode 100644 lib/original/memcmp.c
 create mode 100644 lib/original/memcpy.c
 create mode 100644 lib/original/memset.c
 create mode 100644 lib/original/printf.c
 create mode 100644 lib/original/putchar.c
 create mode 100644 lib/original/qsort.c
 create mode 100644 lib/original/rand.c
 create mode 100644 lib/original/sprintf.c
 create mode 100644 lib/original/sscanf.c
 create mode 100644 lib/original/strchr.c
 create mode 100644 lib/original/strcmp.c
 create mode 100644 lib/original/strcpy.c
 create mode 100644 lib/original/strlen.c
 create mode 100644 lib/original/strncat.c
 create mode 100644 lib/original/strncmp.c
 create mode 100644 lib/original/strncpy.c
 create mode 100644 lib/original/strnlen.c
 create mode 100644 lib/original/strrchr.c
 create mode 100644 lib/original/strstr.c
 create mode 100644 lib/userland.c
 create mode 100644 lib/userland.c.orig
 create mode 100644 screenshot.png
 create mode 100644 shell.orig/addargs.c
 create mode 100644 shell.orig/lexan.c
 create mode 100644 shell.orig/shell.c
 create mode 100644 shell.orig/xsh_argecho.c
 create mode 100644 shell.orig/xsh_cat.c
 create mode 100644 shell.orig/xsh_clear.c
 create mode 100644 shell.orig/xsh_date.c
 create mode 100644 shell.orig/xsh_devdump.c
 create mode 100644 shell.orig/xsh_echo.c
 create mode 100644 shell.orig/xsh_exit.c
 create mode 100644 shell.orig/xsh_help.c
 create mode 100644 shell.orig/xsh_kill.c
 create mode 100644 shell.orig/xsh_memdump.c
 create mode 100644 shell.orig/xsh_memstat.c
 create mode 100644 shell.orig/xsh_ps.c
 create mode 100644 shell.orig/xsh_rdstest.c
 create mode 100644 shell.orig/xsh_sleep.c
 create mode 100644 shell.orig/xsh_uptime.c
 create mode 100644 shell/addargs.c
 create mode 100644 shell/lexan.c
 create mode 100644 shell/shell.c
 create mode 100644 system/ascdate.c
 create mode 100644 system/blink_avr.c
 create mode 100644 system/bufinit.c
 create mode 100644 system/chprio.c
 create mode 100644 system/clkhandler.c
 create mode 100644 system/clkinit.c
 create mode 100644 system/close.c
 create mode 100644 system/control.c
 create mode 100644 system/create.c
 create mode 100644 system/debug.c
 create mode 100644 system/evec.c
 create mode 100644 system/evec.c.orig
 create mode 100644 system/exit.c
 create mode 100644 system/freebuf.c
 create mode 100644 system/freemem.c
 create mode 100644 system/getbuf.c
 create mode 100644 system/getc.c
 create mode 100644 system/getdev.c
 create mode 100644 system/getitem.c
 create mode 100644 system/getmem.c
 create mode 100644 system/getpid.c
 create mode 100644 system/getprio.c
 create mode 100644 system/getstk.c
 create mode 100644 system/getticks.c
 create mode 100644 system/gettime.c
 create mode 100644 system/init.c
 create mode 100644 system/initialize.c
 create mode 100644 system/initialize.c.orig
 create mode 100644 system/insert.c
 create mode 100644 system/insertd.c
 create mode 100644 system/intr.S
 create mode 100644 system/intr.S.orig
 create mode 100644 system/ioerr.c
 create mode 100644 system/ionull.c
 create mode 100644 system/kill.c
 create mode 100644 system/kprintf.c
 create mode 100644 system/main.c
 create mode 100644 system/mark.c
 create mode 100644 system/meminit.c
 create mode 100644 system/mkbufpool.c
 create mode 100644 system/newqueue.c
 create mode 100644 system/open.c
 create mode 100644 system/panic.c
 create mode 100644 system/platinit.c
 create mode 100644 system/ptclear.c
 create mode 100644 system/ptcount.c
 create mode 100644 system/ptcreate.c
 create mode 100644 system/ptdelete.c
 create mode 100644 system/ptinit.c
 create mode 100644 system/ptrecv.c
 create mode 100644 system/ptreset.c
 create mode 100644 system/ptsend.c
 create mode 100644 system/putc.c
 create mode 100644 system/queue.c
 create mode 100644 system/read.c
 create mode 100644 system/ready.c
 create mode 100644 system/receive.c
 create mode 100644 system/recvclr.c
 create mode 100644 system/recvtime.c
 create mode 100644 system/resched.c
 create mode 100644 system/resched.c.orig
 create mode 100644 system/resume.c
 create mode 100644 system/seek.c
 create mode 100644 system/semcount.c
 create mode 100644 system/semcreate.c
 create mode 100644 system/semdelete.c
 create mode 100644 system/semreset.c
 create mode 100644 system/send.c
 create mode 100644 system/serial_avr.c
 create mode 100644 system/signal.c
 create mode 100644 system/signaln.c
 create mode 100644 system/sleep.c
 create mode 100644 system/start.S
 create mode 100644 system/start.S.avr
 create mode 100644 system/start.S.orig
 create mode 100644 system/suspend.c
 create mode 100644 system/syscall.c
 create mode 100644 system/syscall.c.orig
 create mode 100644 system/unsleep.c
 create mode 100644 system/userret.c
 create mode 100644 system/wait.c
 create mode 100644 system/wakeup.c
 create mode 100644 system/write.c
 create mode 100644 system/xdone.c
 create mode 100644 system/yield.c
 create mode 100644 xinu-avr-port.txt

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..0864627
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,20 @@
+Portions of this software are covered by the following copyright:
+
+        Copyright (c) 2012, 2015 Douglas E. Comer and CRC Press, Inc.
+                        All rights reserved.
+
+Redistribution and use in source and binary forms are permitted
+provided that this notice is preserved and that due credit is given
+to the copyright holders. The names of the copyright holders
+may not be used to endorse or promote products derived from this
+software without specific prior written permission. This software
+is provided `as is'' without express or implied warranty. The author
+assumes no liability for damages incidental or consequential, nor is the
+software warranted for correctness or suitability for any purpose.
+        Portions of this software are documented in the book:
+
+        Operating System Design -- The Xinu Approach, CRC Press,
+        Boca Raton, FL, Linksys version 2012, Second Edition 2015.
+
+This software may not be sold or published in printed form without written
+permission from the copyright holders.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..9fab1de
--- /dev/null
+++ b/README.md
@@ -0,0 +1,34 @@
+## What is Xinu?
+Xinu stands for Xinu Is Not Unix -- although it shares concepts and even names with Unix, the internal design differs completely. Xinu is a small, elegant operating system that supports dynamic process creation, dynamic memory allocation, network communication, local and remote file systems, a shell, and device-independent I/O functions. The small size makes Xinu suitable for embedded environments.
+
+## What is Xinu for STM32
+Xinu for STM32 is a port of the ARM version of Xinu. The STM32 family of 32-bit microcontrollers is a popular SoC based on the Arm Cortex-M processor.
+Besides porting the original version, Xinu for STM32 is extended with the following specific Cortex-M* features:
+
+* Shadowed Stack Pointer:  Two stack pointers are available. The MSP is used
+for the OS Kernel and interrupt handlers. The PSP is used by application
+tasks.
+* PendSV exception for scheduling: If Xinu decides that context switching is needed,
+it sets the pending status of the PendSV, and delays the context-switching
+request until all other IRQ handlers have completed their processing before 
+carrying out the PendSV exception 
+
+## Supported Peripherals (currently)
+* UART (Serial)
+* GPIO
+* SPI
+
+## Tested boards
+1. STM32F103* - https://stm32-base.org/boards/STM32F103RCT6-STM32-Mini-V2.0
+2. Qemu for STM32 - https://github.com/beckus/qemu_stm32
+
+## How to build and run
+Xinu for STM32 uses simple Makefiles. The source code should be compiled with a cross compiler (i.e. Ubuntu's standard package: GCC cross compiler for ARM Cortex-A/R/M processors)
+STM32Flash (https://sourceforge.net/projects/stm32flash) can be used for flashing the compiled code to the device's flash ROM. Use `qemu make` to run Xinu for STM32 in Qemu. Please note that this version of qemu should be manually build (see https://github.com/beckus/qemu_stm32)
+
+
+## Screenshots
+![Screenshot](https://github.com/robinkrens/xinu-for-stm32/raw/master/screenshot.png "bootscreen")
+
+More general information about Xinu can be found at https://xinu.cs.purdue.edu/
+
diff --git a/compile/.defs b/compile/.defs
new file mode 100644
index 0000000..c4a77d6
--- /dev/null
+++ b/compile/.defs
@@ -0,0 +1,318 @@
+#-------------------------------------------------------------------------------#
+#										#
+#     Definitions generated by build-make on dom may 17 23:40:51 -03 2020	#
+#										#
+#-------------------------------------------------------------------------------#
+
+SRC_CFILES =
+SRC_SFILES =
+
+
+
+#------------------------------------------------------------------
+#
+#  Directory ../system
+#
+#------------------------------------------------------------------
+
+SYSTEM_SFILES =                                                                 \
+	intr.S        start.S     
+
+SYSTEM_CFILES =                                                                 \
+	ascdate.c     blink_avr.c   bufinit.c     chprio.c      clkhandler.c    \
+	clkinit.c     close.c       conf.c        control.c     create.c        \
+	debug.c       evec.c        exit.c        freebuf.c     freemem.c       \
+	getbuf.c      getc.c        getdev.c      getitem.c     getmem.c        \
+	getpid.c      getprio.c     getstk.c      getticks.c    gettime.c       \
+	init.c        initialize.c  insert.c      insertd.c     ioerr.c         \
+	ionull.c      kill.c        kprintf.c     main.c        mark.c          \
+	meminit.c     mkbufpool.c   newqueue.c    open.c        panic.c         \
+	platinit.c    ptclear.c     ptcount.c     ptcreate.c    ptdelete.c      \
+	ptinit.c      ptrecv.c      ptreset.c     ptsend.c      putc.c          \
+	queue.c       read.c        ready.c       receive.c     recvclr.c       \
+	recvtime.c    resched.c     resume.c      seek.c        semcount.c      \
+	semcreate.c   semdelete.c   semreset.c    send.c        serial_avr.c    \
+	signal.c      signaln.c     sleep.c       suspend.c     syscall.c       \
+	unsleep.c     userret.c     wait.c        wakeup.c      write.c         \
+	xdone.c       yield.c     
+
+SRC_CFILES   += ${SYSTEM_CFILES}
+SRC_SFILES   += ${SYSTEM_SFILES}
+SYSTEM_CFULL += ${SYSTEM_CFILES:%=../system/%}
+SYSTEM_SFULL += ${SYSTEM_SFILES:%=../system/%}
+SRC_CFULL    += ${SYSTEM_CFULL}
+SRC_SFULL    += ${SYSTEM_SFULL}
+
+
+#------------------------------------------------------------------
+#
+#  Directory ../lib
+#
+#------------------------------------------------------------------
+
+LIB_CFILES =                                                                    \
+	ctype_.c    doprnt.c    doscan.c    messages.c  userland.c
+
+SRC_CFILES += ${LIB_CFILES}
+LIB_CFULL  += ${LIB_CFILES:%=../lib/%}
+SRC_CFULL  += ${LIB_CFULL}
+
+
+#------------------------------------------------------------------
+#
+#  Directory ../device/nam
+#
+#------------------------------------------------------------------
+
+DEVICE_NAM_CFILES =                                                             \
+	mount.c    naminit.c  nammap.c   namopen.c
+
+SRC_CFILES       += ${DEVICE_NAM_CFILES}
+DEVICE_NAM_CFULL += ${DEVICE_NAM_CFILES:%=../device/nam/%}
+SRC_CFULL        += ${DEVICE_NAM_CFULL}
+
+
+#------------------------------------------------------------------
+#
+#  Directory ../shell
+#
+#------------------------------------------------------------------
+
+SHELL_CFILES =                                                                  \
+	addargs.c  lexan.c    shell.c  
+
+SRC_CFILES  += ${SHELL_CFILES}
+SHELL_CFULL += ${SHELL_CFILES:%=../shell/%}
+SRC_CFULL   += ${SHELL_CFULL}
+
+
+#-------------------------------------------------------------------------------#
+#										#
+#    		     Rules For Generating Object Files 				#
+#										#
+#-------------------------------------------------------------------------------#
+
+OBJ_TMP     = ${patsubst %.s,%.o,$(SRC_SFILES)}    #	substitute .s => .o
+OBJ_SFILES  = ${patsubst %.S,%.o,$(OBJ_TMP)}       #	substitute .S => .o
+OBJ_CFILES  = ${patsubst %.c,%.o,$(SRC_CFILES)}    #	substitute .c => .o
+OBJ_LIST    = ${OBJ_CFILES} ${OBJ_SFILES}
+OBJ_FILES   = ${OBJ_LIST:%=binaries/%}
+SRC_FULL    = ${SRC_CFULL} ${SRC_SFULL}
+
+#------------------------------------------------------------------
+#  Rules for files in directory ../system
+#------------------------------------------------------------------
+
+binaries/intr.o:        ../system/intr.S
+	${CC} ${CFLAGS} -o binaries/intr.o ../system/intr.S
+binaries/start.o:       ../system/start.S
+	${CC} ${CFLAGS} -o binaries/start.o ../system/start.S
+binaries/ascdate.o:     ../system/ascdate.c
+	${CC} ${CFLAGS} -o binaries/ascdate.o ../system/ascdate.c
+binaries/blink_avr.o:   ../system/blink_avr.c
+	${CC} ${CFLAGS} -o binaries/blink_avr.o ../system/blink_avr.c
+binaries/bufinit.o:     ../system/bufinit.c
+	${CC} ${CFLAGS} -o binaries/bufinit.o ../system/bufinit.c
+binaries/chprio.o:      ../system/chprio.c
+	${CC} ${CFLAGS} -o binaries/chprio.o ../system/chprio.c
+binaries/clkhandler.o:  ../system/clkhandler.c
+	${CC} ${CFLAGS} -o binaries/clkhandler.o ../system/clkhandler.c
+binaries/clkinit.o:     ../system/clkinit.c
+	${CC} ${CFLAGS} -o binaries/clkinit.o ../system/clkinit.c
+binaries/close.o:       ../system/close.c
+	${CC} ${CFLAGS} -o binaries/close.o ../system/close.c
+binaries/conf.o:        ../system/conf.c
+	${CC} ${CFLAGS} -o binaries/conf.o ../system/conf.c
+binaries/control.o:     ../system/control.c
+	${CC} ${CFLAGS} -o binaries/control.o ../system/control.c
+binaries/create.o:      ../system/create.c
+	${CC} ${CFLAGS} -o binaries/create.o ../system/create.c
+binaries/debug.o:       ../system/debug.c
+	${CC} ${CFLAGS} -o binaries/debug.o ../system/debug.c
+binaries/evec.o:        ../system/evec.c
+	${CC} ${CFLAGS} -o binaries/evec.o ../system/evec.c
+binaries/exit.o:        ../system/exit.c
+	${CC} ${CFLAGS} -o binaries/exit.o ../system/exit.c
+binaries/freebuf.o:     ../system/freebuf.c
+	${CC} ${CFLAGS} -o binaries/freebuf.o ../system/freebuf.c
+binaries/freemem.o:     ../system/freemem.c
+	${CC} ${CFLAGS} -o binaries/freemem.o ../system/freemem.c
+binaries/getbuf.o:      ../system/getbuf.c
+	${CC} ${CFLAGS} -o binaries/getbuf.o ../system/getbuf.c
+binaries/getc.o:        ../system/getc.c
+	${CC} ${CFLAGS} -o binaries/getc.o ../system/getc.c
+binaries/getdev.o:      ../system/getdev.c
+	${CC} ${CFLAGS} -o binaries/getdev.o ../system/getdev.c
+binaries/getitem.o:     ../system/getitem.c
+	${CC} ${CFLAGS} -o binaries/getitem.o ../system/getitem.c
+binaries/getmem.o:      ../system/getmem.c
+	${CC} ${CFLAGS} -o binaries/getmem.o ../system/getmem.c
+binaries/getpid.o:      ../system/getpid.c
+	${CC} ${CFLAGS} -o binaries/getpid.o ../system/getpid.c
+binaries/getprio.o:     ../system/getprio.c
+	${CC} ${CFLAGS} -o binaries/getprio.o ../system/getprio.c
+binaries/getstk.o:      ../system/getstk.c
+	${CC} ${CFLAGS} -o binaries/getstk.o ../system/getstk.c
+binaries/getticks.o:    ../system/getticks.c
+	${CC} ${CFLAGS} -o binaries/getticks.o ../system/getticks.c
+binaries/gettime.o:     ../system/gettime.c
+	${CC} ${CFLAGS} -o binaries/gettime.o ../system/gettime.c
+binaries/init.o:        ../system/init.c
+	${CC} ${CFLAGS} -o binaries/init.o ../system/init.c
+binaries/initialize.o:  ../system/initialize.c
+	${CC} ${CFLAGS} -o binaries/initialize.o ../system/initialize.c
+binaries/insert.o:      ../system/insert.c
+	${CC} ${CFLAGS} -o binaries/insert.o ../system/insert.c
+binaries/insertd.o:     ../system/insertd.c
+	${CC} ${CFLAGS} -o binaries/insertd.o ../system/insertd.c
+binaries/ioerr.o:       ../system/ioerr.c
+	${CC} ${CFLAGS} -o binaries/ioerr.o ../system/ioerr.c
+binaries/ionull.o:      ../system/ionull.c
+	${CC} ${CFLAGS} -o binaries/ionull.o ../system/ionull.c
+binaries/kill.o:        ../system/kill.c
+	${CC} ${CFLAGS} -o binaries/kill.o ../system/kill.c
+binaries/kprintf.o:     ../system/kprintf.c
+	${CC} ${CFLAGS} -o binaries/kprintf.o ../system/kprintf.c
+binaries/main.o:        ../system/main.c
+	${CC} ${CFLAGS} -o binaries/main.o ../system/main.c
+binaries/mark.o:        ../system/mark.c
+	${CC} ${CFLAGS} -o binaries/mark.o ../system/mark.c
+binaries/meminit.o:     ../system/meminit.c
+	${CC} ${CFLAGS} -o binaries/meminit.o ../system/meminit.c
+binaries/mkbufpool.o:   ../system/mkbufpool.c
+	${CC} ${CFLAGS} -o binaries/mkbufpool.o ../system/mkbufpool.c
+binaries/newqueue.o:    ../system/newqueue.c
+	${CC} ${CFLAGS} -o binaries/newqueue.o ../system/newqueue.c
+binaries/open.o:        ../system/open.c
+	${CC} ${CFLAGS} -o binaries/open.o ../system/open.c
+binaries/panic.o:       ../system/panic.c
+	${CC} ${CFLAGS} -o binaries/panic.o ../system/panic.c
+binaries/platinit.o:    ../system/platinit.c
+	${CC} ${CFLAGS} -o binaries/platinit.o ../system/platinit.c
+binaries/ptclear.o:     ../system/ptclear.c
+	${CC} ${CFLAGS} -o binaries/ptclear.o ../system/ptclear.c
+binaries/ptcount.o:     ../system/ptcount.c
+	${CC} ${CFLAGS} -o binaries/ptcount.o ../system/ptcount.c
+binaries/ptcreate.o:    ../system/ptcreate.c
+	${CC} ${CFLAGS} -o binaries/ptcreate.o ../system/ptcreate.c
+binaries/ptdelete.o:    ../system/ptdelete.c
+	${CC} ${CFLAGS} -o binaries/ptdelete.o ../system/ptdelete.c
+binaries/ptinit.o:      ../system/ptinit.c
+	${CC} ${CFLAGS} -o binaries/ptinit.o ../system/ptinit.c
+binaries/ptrecv.o:      ../system/ptrecv.c
+	${CC} ${CFLAGS} -o binaries/ptrecv.o ../system/ptrecv.c
+binaries/ptreset.o:     ../system/ptreset.c
+	${CC} ${CFLAGS} -o binaries/ptreset.o ../system/ptreset.c
+binaries/ptsend.o:      ../system/ptsend.c
+	${CC} ${CFLAGS} -o binaries/ptsend.o ../system/ptsend.c
+binaries/putc.o:        ../system/putc.c
+	${CC} ${CFLAGS} -o binaries/putc.o ../system/putc.c
+binaries/queue.o:       ../system/queue.c
+	${CC} ${CFLAGS} -o binaries/queue.o ../system/queue.c
+binaries/read.o:        ../system/read.c
+	${CC} ${CFLAGS} -o binaries/read.o ../system/read.c
+binaries/ready.o:       ../system/ready.c
+	${CC} ${CFLAGS} -o binaries/ready.o ../system/ready.c
+binaries/receive.o:     ../system/receive.c
+	${CC} ${CFLAGS} -o binaries/receive.o ../system/receive.c
+binaries/recvclr.o:     ../system/recvclr.c
+	${CC} ${CFLAGS} -o binaries/recvclr.o ../system/recvclr.c
+binaries/recvtime.o:    ../system/recvtime.c
+	${CC} ${CFLAGS} -o binaries/recvtime.o ../system/recvtime.c
+binaries/resched.o:     ../system/resched.c
+	${CC} ${CFLAGS} -o binaries/resched.o ../system/resched.c
+binaries/resume.o:      ../system/resume.c
+	${CC} ${CFLAGS} -o binaries/resume.o ../system/resume.c
+binaries/seek.o:        ../system/seek.c
+	${CC} ${CFLAGS} -o binaries/seek.o ../system/seek.c
+binaries/semcount.o:    ../system/semcount.c
+	${CC} ${CFLAGS} -o binaries/semcount.o ../system/semcount.c
+binaries/semcreate.o:   ../system/semcreate.c
+	${CC} ${CFLAGS} -o binaries/semcreate.o ../system/semcreate.c
+binaries/semdelete.o:   ../system/semdelete.c
+	${CC} ${CFLAGS} -o binaries/semdelete.o ../system/semdelete.c
+binaries/semreset.o:    ../system/semreset.c
+	${CC} ${CFLAGS} -o binaries/semreset.o ../system/semreset.c
+binaries/send.o:        ../system/send.c
+	${CC} ${CFLAGS} -o binaries/send.o ../system/send.c
+binaries/serial_avr.o:  ../system/serial_avr.c
+	${CC} ${CFLAGS} -o binaries/serial_avr.o ../system/serial_avr.c
+binaries/signal.o:      ../system/signal.c
+	${CC} ${CFLAGS} -o binaries/signal.o ../system/signal.c
+binaries/signaln.o:     ../system/signaln.c
+	${CC} ${CFLAGS} -o binaries/signaln.o ../system/signaln.c
+binaries/sleep.o:       ../system/sleep.c
+	${CC} ${CFLAGS} -o binaries/sleep.o ../system/sleep.c
+binaries/suspend.o:     ../system/suspend.c
+	${CC} ${CFLAGS} -o binaries/suspend.o ../system/suspend.c
+binaries/syscall.o:     ../system/syscall.c
+	${CC} ${CFLAGS} -o binaries/syscall.o ../system/syscall.c
+binaries/unsleep.o:     ../system/unsleep.c
+	${CC} ${CFLAGS} -o binaries/unsleep.o ../system/unsleep.c
+binaries/userret.o:     ../system/userret.c
+	${CC} ${CFLAGS} -o binaries/userret.o ../system/userret.c
+binaries/wait.o:        ../system/wait.c
+	${CC} ${CFLAGS} -o binaries/wait.o ../system/wait.c
+binaries/wakeup.o:      ../system/wakeup.c
+	${CC} ${CFLAGS} -o binaries/wakeup.o ../system/wakeup.c
+binaries/write.o:       ../system/write.c
+	${CC} ${CFLAGS} -o binaries/write.o ../system/write.c
+binaries/xdone.o:       ../system/xdone.c
+	${CC} ${CFLAGS} -o binaries/xdone.o ../system/xdone.c
+binaries/yield.o:       ../system/yield.c
+	${CC} ${CFLAGS} -o binaries/yield.o ../system/yield.c
+
+#------------------------------------------------------------------
+#  Rules for files in directory ../lib
+#------------------------------------------------------------------
+
+binaries/ctype_.o:      ../lib/ctype_.c
+	${CC} ${CFLAGS} -o binaries/ctype_.o ../lib/ctype_.c
+binaries/doprnt.o:      ../lib/doprnt.c
+	${CC} ${CFLAGS} -o binaries/doprnt.o ../lib/doprnt.c
+binaries/doscan.o:      ../lib/doscan.c
+	${CC} ${CFLAGS} -o binaries/doscan.o ../lib/doscan.c
+binaries/messages.o:    ../lib/messages.c
+	${CC} ${CFLAGS} -o binaries/messages.o ../lib/messages.c
+binaries/userland.o:    ../lib/userland.c
+	${CC} ${CFLAGS} -o binaries/userland.o ../lib/userland.c
+
+#------------------------------------------------------------------
+#  Rules for files in directory ../device/nam
+#------------------------------------------------------------------
+
+binaries/mount.o:       ../device/nam/mount.c
+	${CC} ${CFLAGS} -o binaries/mount.o ../device/nam/mount.c
+binaries/naminit.o:     ../device/nam/naminit.c
+	${CC} ${CFLAGS} -o binaries/naminit.o ../device/nam/naminit.c
+binaries/nammap.o:      ../device/nam/nammap.c
+	${CC} ${CFLAGS} -o binaries/nammap.o ../device/nam/nammap.c
+binaries/namopen.o:     ../device/nam/namopen.c
+	${CC} ${CFLAGS} -o binaries/namopen.o ../device/nam/namopen.c
+
+#------------------------------------------------------------------
+#  Rules for files in directory ../shell
+#------------------------------------------------------------------
+
+binaries/addargs.o:     ../shell/addargs.c
+	${CC} ${CFLAGS} -o binaries/addargs.o ../shell/addargs.c
+binaries/lexan.o:       ../shell/lexan.c
+	${CC} ${CFLAGS} -o binaries/lexan.o ../shell/lexan.c
+binaries/shell.o:       ../shell/shell.c
+	${CC} ${CFLAGS} -o binaries/shell.o ../shell/shell.c
+
+objs:	${OBJ_FILES}
+
+list_obj:
+	@echo ${OBJ_FILES}
+
+list_csrc:
+	@echo ${SRC_CFILES}
+
+list_ssrc:
+	@echo ${SRC_SFILES}
+
+# Export variables for recursive make calls (such as the library)
+
+export
+
diff --git a/compile/.deps b/compile/.deps
new file mode 100644
index 0000000..4c6e4a0
--- /dev/null
+++ b/compile/.deps
@@ -0,0 +1,2683 @@
+ascdate.o: ../system/ascdate.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+bufinit.o: ../system/bufinit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+chprio.o: ../system/chprio.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+clkhandler.o: ../system/clkhandler.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+clkinit.o: ../system/clkinit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+close.o: ../system/close.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+conf.o: ../system/conf.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+control.o: ../system/control.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+create.o: ../system/create.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+evec.o: ../system/evec.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+exit.o: ../system/exit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+freebuf.o: ../system/freebuf.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+freemem.o: ../system/freemem.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+getbuf.o: ../system/getbuf.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+getc.o: ../system/getc.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+getdev.o: ../system/getdev.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+getitem.o: ../system/getitem.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+getmem.o: ../system/getmem.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+getpid.o: ../system/getpid.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+getprio.o: ../system/getprio.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+getstk.o: ../system/getstk.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+getticks.o: ../system/getticks.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+gettime.o: ../system/gettime.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+getutime.o: ../system/getutime.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+init.o: ../system/init.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+initialize.o: ../system/initialize.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+insert.o: ../system/insert.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+insertd.o: ../system/insertd.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ioerr.o: ../system/ioerr.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ionull.o: ../system/ionull.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+kill.o: ../system/kill.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+kprintf.o: ../system/kprintf.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h ../include/stdarg.h
+main.o: ../system/main.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+mark.o: ../system/mark.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+meminit.o: ../system/meminit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+mkbufpool.o: ../system/mkbufpool.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+newqueue.o: ../system/newqueue.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+open.o: ../system/open.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+panic.o: ../system/panic.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+platinit.o: ../system/platinit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ptclear.o: ../system/ptclear.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ptcount.o: ../system/ptcount.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ptcreate.o: ../system/ptcreate.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ptdelete.o: ../system/ptdelete.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ptinit.o: ../system/ptinit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ptrecv.o: ../system/ptrecv.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ptreset.o: ../system/ptreset.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ptsend.o: ../system/ptsend.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+putc.o: ../system/putc.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+queue.o: ../system/queue.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+read.o: ../system/read.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ready.o: ../system/ready.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+receive.o: ../system/receive.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+recvclr.o: ../system/recvclr.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+recvtime.o: ../system/recvtime.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+resched.o: ../system/resched.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+resume.o: ../system/resume.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+seek.o: ../system/seek.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+semcount.o: ../system/semcount.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+semcreate.o: ../system/semcreate.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+semdelete.o: ../system/semdelete.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+semreset.o: ../system/semreset.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+send.o: ../system/send.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+signal.o: ../system/signal.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+signaln.o: ../system/signaln.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+sleep.o: ../system/sleep.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+suspend.o: ../system/suspend.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+unsleep.o: ../system/unsleep.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+userret.o: ../system/userret.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+wait.o: ../system/wait.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+wakeup.o: ../system/wakeup.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+write.o: ../system/write.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xdone.o: ../system/xdone.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+yield.o: ../system/yield.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+abs.o: ../lib/abs.c
+atoi.o: ../lib/atoi.c
+atol.o: ../lib/atol.c
+bzero.o: ../lib/bzero.c
+ctype_.o: ../lib/ctype_.c ../include/ctype.h
+doprnt.o: ../lib/doprnt.c ../include/stdarg.h
+doscan.o: ../lib/doscan.c ../include/ctype.h
+fdoprnt.o: ../lib/fdoprnt.c ../include/stdarg.h
+fgetc.o: ../lib/fgetc.c
+fgets.o: ../lib/fgets.c
+fprintf.o: ../lib/fprintf.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h ../include/stdarg.h
+fputc.o: ../lib/fputc.c
+fputs.o: ../lib/fputs.c
+fscanf.o: ../lib/fscanf.c
+getchar.o: ../lib/getchar.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+labs.o: ../lib/labs.c
+memchr.o: ../lib/memchr.c
+memcmp.o: ../lib/memcmp.c
+memcpy.o: ../lib/memcpy.c
+memset.o: ../lib/memset.c
+printf.o: ../lib/printf.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h ../include/stdarg.h
+putchar.o: ../lib/putchar.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+qsort.o: ../lib/qsort.c
+rand.o: ../lib/rand.c ../include/stdlib.h
+sprintf.o: ../lib/sprintf.c ../include/stdarg.h
+sscanf.o: ../lib/sscanf.c
+strchr.o: ../lib/strchr.c
+strcmp.o: ../lib/strcmp.c
+strcpy.o: ../lib/strcpy.c
+strlen.o: ../lib/strlen.c
+strncat.o: ../lib/strncat.c
+strncmp.o: ../lib/strncmp.c
+strncpy.o: ../lib/strncpy.c
+strnlen.o: ../lib/strnlen.c
+strrchr.o: ../lib/strrchr.c
+strstr.o: ../lib/strstr.c
+ttycontrol.o: ../device/tty/ttycontrol.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ttygetc.o: ../device/tty/ttygetc.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ttyhandle_in.o: ../device/tty/ttyhandle_in.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ttyhandle_out.o: ../device/tty/ttyhandle_out.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ttyhandler.o: ../device/tty/ttyhandler.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ttyinit.o: ../device/tty/ttyinit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ttykickout.o: ../device/tty/ttykickout.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ttyputc.o: ../device/tty/ttyputc.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ttyread.o: ../device/tty/ttyread.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ttywrite.o: ../device/tty/ttywrite.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+mount.o: ../device/nam/mount.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+naminit.o: ../device/nam/naminit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+nammap.o: ../device/nam/nammap.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+namopen.o: ../device/nam/namopen.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ethcontrol.o: ../device/eth/ethcontrol.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ethhandler.o: ../device/eth/ethhandler.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ethinit.o: ../device/eth/ethinit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ethread.o: ../device/eth/ethread.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ethwrite.o: ../device/eth/ethwrite.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rdsbufalloc.o: ../device/rds/rdsbufalloc.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rdsclose.o: ../device/rds/rdsclose.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rdscomm.o: ../device/rds/rdscomm.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rdscontrol.o: ../device/rds/rdscontrol.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rdsinit.o: ../device/rds/rdsinit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rdsopen.o: ../device/rds/rdsopen.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rdsprocess.o: ../device/rds/rdsprocess.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rdsread.o: ../device/rds/rdsread.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rdswrite.o: ../device/rds/rdswrite.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ramclose.o: ../device/ram/ramclose.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+raminit.o: ../device/ram/raminit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h ../include/ramdisk.h
+ramopen.o: ../device/ram/ramopen.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ramread.o: ../device/ram/ramread.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h ../include/ramdisk.h
+ramwrite.o: ../device/ram/ramwrite.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h ../include/ramdisk.h
+lfdballoc.o: ../device/lfs/lfdballoc.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lfdbfree.o: ../device/lfs/lfdbfree.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lfflush.o: ../device/lfs/lfflush.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lfgetmode.o: ../device/lfs/lfgetmode.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lfiballoc.o: ../device/lfs/lfiballoc.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lfibclear.o: ../device/lfs/lfibclear.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lfibget.o: ../device/lfs/lfibget.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lfibput.o: ../device/lfs/lfibput.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lflclose.o: ../device/lfs/lflclose.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lflcontrol.o: ../device/lfs/lflcontrol.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lflgetc.o: ../device/lfs/lflgetc.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lflinit.o: ../device/lfs/lflinit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lflputc.o: ../device/lfs/lflputc.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lflread.o: ../device/lfs/lflread.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lflseek.o: ../device/lfs/lflseek.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lflwrite.o: ../device/lfs/lflwrite.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lfscheck.o: ../device/lfs/lfscheck.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h ../include/ramdisk.h
+lfsckfmt.o: ../device/lfs/lfsckfmt.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h ../include/ramdisk.h
+lfscreate.o: ../device/lfs/lfscreate.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h ../include/ramdisk.h
+lfsetup.o: ../device/lfs/lfsetup.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lfsinit.o: ../device/lfs/lfsinit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lfsopen.o: ../device/lfs/lfsopen.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+lftruncate.o: ../device/lfs/lftruncate.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rflclose.o: ../device/rfs/rflclose.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rflgetc.o: ../device/rfs/rflgetc.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rflinit.o: ../device/rfs/rflinit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rflputc.o: ../device/rfs/rflputc.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rflread.o: ../device/rfs/rflread.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rflseek.o: ../device/rfs/rflseek.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rflwrite.o: ../device/rfs/rflwrite.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rfscomm.o: ../device/rfs/rfscomm.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rfscontrol.o: ../device/rfs/rfscontrol.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rfsgetmode.o: ../device/rfs/rfsgetmode.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rfsinit.o: ../device/rfs/rfsinit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rfsndmsg.o: ../device/rfs/rfsndmsg.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+rfsopen.o: ../device/rfs/rfsopen.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+spicontrol.o: ../device/spi/spicontrol.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+spiinit.o: ../device/spi/spiinit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+gpiocontrol.o: ../device/gpio/gpiocontrol.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+gpiohandler.o: ../device/gpio/gpiohandler.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+gpioinit.o: ../device/gpio/gpioinit.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+gpioread.o: ../device/gpio/gpioread.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+gpioselect.o: ../device/gpio/gpioselect.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+gpiowrite.o: ../device/gpio/gpiowrite.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+arp.o: ../net/arp.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+dhcp.o: ../net/dhcp.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+dns.o: ../net/dns.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h ../include/dns.h
+dot2ip.o: ../net/dot2ip.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+hexdump.o: ../net/hexdump.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+icmp.o: ../net/icmp.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ip.o: ../net/ip.c ../include/xinu.h ../include/kernel.h ../include/conf.h \
+ ../include/process.h ../include/queue.h ../include/resched.h \
+ ../include/semaphore.h ../include/memory.h ../include/bufpool.h \
+ ../include/clock.h ../include/mark.h ../include/ports.h \
+ ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+net.o: ../net/net.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+pdump.o: ../net/pdump.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+tftp.o: ../net/tftp.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h ../include/stdlib.h
+udp.o: ../net/udp.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+addargs.o: ../shell/addargs.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h \
+ ../include/shprototypes.h
+lexan.o: ../shell/lexan.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+shell.o: ../shell/shell.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h \
+ ../include/shprototypes.h
+xsh_argecho.o: ../shell/xsh_argecho.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_arp.o: ../shell/xsh_arp.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_cat.o: ../shell/xsh_cat.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_clear.o: ../shell/xsh_clear.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_date.o: ../shell/xsh_date.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_devdump.o: ../shell/xsh_devdump.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_echo.o: ../shell/xsh_echo.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_exit.o: ../shell/xsh_exit.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_help.o: ../shell/xsh_help.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_kill.o: ../shell/xsh_kill.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_memdump.o: ../shell/xsh_memdump.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_memstat.o: ../shell/xsh_memstat.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_netinfo.o: ../shell/xsh_netinfo.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_ping.o: ../shell/xsh_ping.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_ps.o: ../shell/xsh_ps.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_sleep.o: ../shell/xsh_sleep.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_udpdump.o: ../shell/xsh_udpdump.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_udpecho.o: ../shell/xsh_udpecho.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_udpserver.o: ../shell/xsh_udpserver.c ../include/xinu.h \
+ ../include/kernel.h ../include/conf.h ../include/process.h \
+ ../include/queue.h ../include/resched.h ../include/semaphore.h \
+ ../include/memory.h ../include/bufpool.h ../include/clock.h \
+ ../include/mark.h ../include/ports.h ../include/uart.h ../include/tty.h \
+ ../include/gpio.h ../include/gpioselect.h ../include/device.h \
+ ../include/interrupt.h ../include/file.h ../include/rfilesys.h \
+ ../include/rdisksys.h ../include/lfilesys.h ../include/spi.h \
+ ../include/ether.h ../include/net.h ../include/ip.h ../include/arp.h \
+ ../include/udp.h ../include/dhcp.h ../include/icmp.h ../include/tftp.h \
+ ../include/name.h ../include/shell.h ../include/date.h \
+ ../include/prototypes.h ../include/delay.h ../include/stdio.h \
+ ../include/string.h ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+xsh_uptime.o: ../shell/xsh_uptime.c ../include/xinu.h ../include/kernel.h \
+ ../include/conf.h ../include/process.h ../include/queue.h \
+ ../include/resched.h ../include/semaphore.h ../include/memory.h \
+ ../include/bufpool.h ../include/clock.h ../include/mark.h \
+ ../include/ports.h ../include/uart.h ../include/tty.h ../include/gpio.h \
+ ../include/gpioselect.h ../include/device.h ../include/interrupt.h \
+ ../include/file.h ../include/rfilesys.h ../include/rdisksys.h \
+ ../include/lfilesys.h ../include/spi.h ../include/ether.h \
+ ../include/net.h ../include/ip.h ../include/arp.h ../include/udp.h \
+ ../include/dhcp.h ../include/icmp.h ../include/tftp.h ../include/name.h \
+ ../include/shell.h ../include/date.h ../include/prototypes.h \
+ ../include/delay.h ../include/stdio.h ../include/string.h \
+ ../include/am335x_control.h ../include/am335x_eth.h \
+ ../include/am335x_watchdog.h ../include/armv7a.h
+ctxsw.o: ../system/ctxsw.S
+intr.o: ../system/intr.S ../include/armv7a.h
+start.o: ../system/start.S ../include/armv7a.h
diff --git a/compile/.vers_num b/compile/.vers_num
new file mode 100644
index 0000000..1b1c131
--- /dev/null
+++ b/compile/.vers_num
@@ -0,0 +1 @@
+280
diff --git a/compile/DAC_OUT_PUT1.txt b/compile/DAC_OUT_PUT1.txt
new file mode 100644
index 0000000..ea3b9ba
--- /dev/null
+++ b/compile/DAC_OUT_PUT1.txt
@@ -0,0 +1 @@
+****DAC_OUT_PUT1 : Result of conversion DAC channel 1****
diff --git a/compile/DAC_OUT_PUT2.txt b/compile/DAC_OUT_PUT2.txt
new file mode 100644
index 0000000..e443c1c
--- /dev/null
+++ b/compile/DAC_OUT_PUT2.txt
@@ -0,0 +1 @@
+****DAC_OUT_PUT2 : Result of conversion DAC channel 2****
diff --git a/compile/Makefile b/compile/Makefile
new file mode 100644
index 0000000..67985dd
--- /dev/null
+++ b/compile/Makefile
@@ -0,0 +1,199 @@
+#########################################################################
+#									#
+#									#
+#  Makefile for STM32 version of the Xinu operating system		#
+#									#
+#  includes: .deps and .defs						#
+#									#
+#									#
+#########################################################################
+
+COMPILER_ROOT	=	avr-
+PNAME		=	ATMEGA328P
+PLAT		=	Platform_$(PNAME)
+TOPDIR		=	..
+
+CC		=	${COMPILER_ROOT}gcc
+LD		=	${COMPILER_ROOT}gcc
+OBJCOPY		=	${COMPILER_ROOT}objcopy
+OBJDUMP		=	${COMPILER_ROOT}objdump
+QEMU		=	/home/lechnerm/rafa/xinu/qemu_stm32/arm-softmmu/qemu-system-arm
+XINU		=	$(TOPDIR)/compile/xinu.elf
+XINUBIN		=	$(TOPDIR)/compile/xinu.bin
+XINUHEX		=	$(TOPDIR)/compile/xinu.hex
+XINUBOOT	=	$(TOPDIR)/compile/xinu
+BUILDMAKE	=	$(TOPDIR)/compile/bin/build-make
+MKVERS		=	$(TOPDIR)/compile/bin/mkvers
+
+MAKEDEP		=	$(CC) -M -MG
+
+DEPSFILE	=	.deps
+DEFSFILE	=	.defs
+VERSIONFILE	=	version
+LDSCRIPT	=	ld.script
+MKVERS		=	$(TOPDIR)/compile/bin/mkvers
+
+
+			# RAFA -s $(TOPDIR)/device/ram			\
+REBUILDFLAGS	=	-s $(TOPDIR)/system  debug.c 	\
+			#-s $(TOPDIR)/device/gpio			\
+			#-s $(TOPDIR)/device/spi			\
+			-s $(TOPDIR)/device/tty			\
+			#
+REBUILDFLAGS	=	-s $(TOPDIR)/system   	\
+			-s $(TOPDIR)/lib			\
+			-s $(TOPDIR)/device/nam			\
+			-s $(TOPDIR)/shell  'xsh_rdstest*'
+
+INCLUDE		=	-I$(TOPDIR)/include
+# RAFA DEFS		= 	-DBSDURG -DVERSION=\""`cat $(VERSIONFILE)`"\"
+DEFS		= 	-DVERSION=\""Rafa"\"
+
+# Compiler flags
+# CFLAGS  = -mcpu=cortex-m3 -mno-unaligned-access -mthumb -fno-builtin -fno-stack-protector -nostdlib -c -Wall -O ${DEFS} ${INCLUDE}
+# CFLAGS  = -DF_CPU=16000000UL -mmcu=atmega328p -mrelax -fno-builtin -fno-stack-protector -nostdlib -c -Wall -Os ${DEFS} ${INCLUDE}
+CFLAGS  = -DF_CPU=16000000UL -mmcu=atmega328p  -fno-builtin -c -Wall -Os ${DEFS} ${INCLUDE}
+SFLAGS  = ${INCLUDE}
+
+# Loader flags
+
+# RAFA LDFLAGS = -Wl,--wrap,malloc,--wrap,free,--wrap,realloc,--wrap,fdevopen
+# LDFLAGS = -mmcu=atmega328p -nostartfiles -T ld.script  -Wl,-Map,xinu.map
+LDFLAGS = -mmcu=atmega328p -Wl,-Map,xinu.map
+
+all:	xinu
+
+#--------------------------------------------------------------------------------
+# Handle generation of a new version string when initialize is recompiled
+#--------------------------------------------------------------------------------
+
+newversion:
+	@echo creating new version
+	@$(MKVERS) $(PNAME) > version
+
+#--------------------------------------------------------------------------------
+# Include generic make targets and rules from the file generated by build-make
+#--------------------------------------------------------------------------------
+-include $(DEFSFILE)
+
+#--------------------------------------------------------------------------------
+# Add files that require special rules and place start.o at the front
+#--------------------------------------------------------------------------------
+# RAFA quitamos el start.S y start.o porque intentaremos el startup de avr
+LD_LIST = binaries/start.o $(filter-out binaries/start.o,$(OBJ_FILES))
+# LD_LIST = $(filter-out binaries/start.o,$(OBJ_FILES))
+
+#------------------------------------------------------------
+# Rules for files that need special handling
+#------------------------------------------------------------
+
+# Define variables for the Configuration file and generated files
+
+CONFFILE	= $(TOPDIR)/config/Configuration
+CONFH		= $(TOPDIR)/include/conf.h
+CONFC		= $(TOPDIR)/system/conf.c
+
+# Define variables for the config program and its sources
+
+CONFPGM		= $(TOPDIR)/config/config
+CONFL		= $(TOPDIR)/config/config.l
+CONFY		= $(TOPDIR)/config/config.y
+
+# Set up the required build directory structure
+
+BLDDIRS	= binaries
+export
+
+#--------------------------------------------------------------------------------
+# Specific additional rules and exceptions
+#--------------------------------------------------------------------------------
+
+xinu:	Makefile rebuild $(BLDDIRS) $(DEFSFILE) $(DEPSFILE) $(CONFH) $(CONFC) $(LD_LIST)
+	@echo;echo 'Loading object files to produce xinu'
+	# RAFA original : @$(LD) $(LDFLAGS) $(LD_LIST) -o $(XINU) -L/usr/lib/gcc/arm-none-eabi/6.3.1/ --print-memory-usage
+	@$(LD) $(LDFLAGS) $(LD_LIST) -o $(XINU) 
+	@echo "Creating Binary..."
+	@$(OBJCOPY) -O binary $(XINU) $(XINUBIN)
+
+examine-all:
+	$(OBJDUMP) -D $(XINU) | less
+
+examine-header:
+	$(OBJDUMP) -x $(XINU) | less
+
+flash:
+	avr-objcopy -O ihex -R .eeprom $(XINU) $(XINUHEX)
+	avrdude -p atmega328p -c arduino -P /dev/ttyUSB0 -b 57600 -D -U flash:w:$(XINUHEX):i
+	# avrdude -p atmega328p -c arduino -P /dev/ttyUSB0 -b 115200 -D -U flash:w:$(FIRMWARE):i
+
+
+qemu:
+	$(QEMU) -serial stdio -M stm32-f103c8 -kernel $(XINUBIN) 
+monitor:
+	$(QEMU) -monitor stdio -serial stdio -M stm32-f103c8 -kernel $(XINUBIN) 
+
+$(BLDDIRS): 
+	@mkdir -p $(BLDDIRS)
+
+objects: $(LD_LIST)
+
+$(CONFH): $(CONFFILE) $(CONFPGM)
+	@echo making $(CONFH)
+	@make configure
+
+$(CONFC): $(CONFFILE) $(CONFPGM)
+	@echo making $(CONFC)
+	@make configure
+
+$(CONFPGM): $(CONFL) $(CONFY)
+	@echo making the config program
+	@make -C $(TOPDIR)/config clean all install
+
+configure:
+	@echo forcing a rebuild of conf.h and conf.c
+	@make newversion
+	@(cd $(TOPDIR)/config; make install)
+
+clean:
+	@echo removing .o files
+	@rm -f ${LD_LIST}
+	@echo   removing configuration files ...
+	@rm -f $(CONFH) $(CONFC)
+	@(cd $(TOPDIR)/config; make clean)
+	@echo removing xinu ...
+	@rm -f $(XINU)
+	@rm -f $(XINUBIN)
+	@rm -f $(XINUBOOT)
+
+#--------------------------------------------------------------------------------
+# Locations of source directories and exceptions (.c and .[sS] files to exclude)
+#--------------------------------------------------------------------------------
+	
+$(DEFSFILE):
+	@rm -f $(DEFSFILE)
+	@echo "" > $(DEFSFILE)
+	@make rebuild
+
+$(DEPSFILE):
+	@rm -f $(DEPSFILE)
+	@echo "" > $(DEPSFILE)
+	@make depend
+
+rebuild: $(CONFC)
+	@echo Rebuilding the $(DEFSFILE) file
+	@$(BUILDMAKE) $(REBUILDFLAGS) > $(DEFSFILE)
+
+defclean:
+	rm -f $(DEFSFILE)
+	echo "" > $(DEFSFILE)
+
+depend: $(DEFSFILE)
+	@echo;echo Making all dependencies in $(DEPSFILE)
+	@$(MAKEDEP) ${INCLUDE} ${SRC_FULL} > $(DEPSFILE)
+	@echo;echo Finished making dependencies
+
+depclean:
+	rm -f $(DEPSFILE)
+	echo "" > $(DEPSFILE)
+
+-include $(DEPSFILE)
diff --git a/compile/bin/build-make b/compile/bin/build-make
new file mode 100755
index 0000000..f930488
--- /dev/null
+++ b/compile/bin/build-make
@@ -0,0 +1,710 @@
+#!/bin/sh
+#########################################################################
+#									#
+# build-make  -  build entries for a makefile				#
+#									#
+# use:  build-make dir_spec...						#
+#									#
+#	where each dir_spec, which specifies one of the source		#
+#	directories to include has the form:				#
+#									#
+#		-s source_dir_path [pattern...]				#
+#									#
+#	Build-make generates rules for a Makefile that will compile	#
+#	the source files from the specified set of source directories.	#
+#	Build-make is run in the directory that will hold the Makefile,	#
+#	and assumes .o files will be placed in the  ./binaries		#
+#	directory in the same file as the Makefile.			#
+#									#
+#									#
+#	A directory specification begins with a -s srgument that is	#
+#	followed by a source directory name (a relative path is		#
+#	recommended, but not required), and a list of zero or more	#
+#	patterns.  The patterns are used to specify which files		#
+#	from source directory should be omitted from consideration.	#
+#	Build-make starts by making a list of all C and assembly	#
+#	language files in the directory (i.e. files that match *.c and	#
+#	*.[Ss]).  It then uses the set of patterns (if any are present)	#
+#	to decide which	of the files to exclude from further		#
+#	processing.  A pattern can contain literal characters plus one	#
+#	asterisk, which	indicates a wild card match.  For example,	#
+#	'xxx', 'xxx*', '*xxx', 'xxx*yyy' are legal forms of patterns.	#
+#	Note: any pattern argument that contains an asterisk must be	#
+#	enclosed in quotes on the command line to prevent the shell	#
+#	from interpreting it.  For example, to omit files that start	#
+#	with 'debug', one would specify: 'debug*' in quotes.  Omitting	#
+#	files has two purposes.  First, it allows files to be left in	#
+#	the soruce directory that are not normally needed (e.g.,	#
+#	debug.c).  Second, a programmer can specify a set of files	#
+#	for which standard compilation rules are insufficient.  Of	#
+#	course, if a programmer omits a file, the programmer must	#
+#	insert a compilation rule into the Makefile.			#
+#									#
+#	Build-make does not create a complete Makefile.  Instead,	#
+#	build-make writes text output to stdout and allows the		#
+#	programmer to use the output to construct a Makefile.		#
+#	Typically, a programmer runs:					#
+#									#
+#			build-make > Makedefs				#
+#									#
+#	and then inserts the line					#
+#									#
+#			include Makedefs				#
+#									#
+#	into a Makefile.  Doing so allows the Makedefs to be recreated	#
+#	easily if the contents of the source directories change.	#
+#									#
+#	Build-make generates two variables: SOURCE_FILES that contains	#
+#	a list of all source file names, and OBJECT_FILES that lists	#
+#	all the object files.  it also generates a list of rules	#
+#	for generating object files.  For example, a rule might		#
+#	be:								#
+#									#
+# binaries/aaa.o: ../../system/aaa.c					#
+#		  $(CC) $(CFLAGS) -o binaries/aaa.o ../../system/aaa.c	#
+#									#
+#########################################################################
+
+MSG1='use is:  build-make dir_spec...'
+MSG2='         where dir_spec is   -s source_dir_path  [pattern...]'
+
+#
+# Define prefixes shared by this script and the awk program
+#
+PRE_ERR='+ERROR:'
+PRE_DIR='+DIR:'
+PRE_OMIT='+OMIT:'
+PRE_CFILE='+CFILE:'
+PRE_SFILE='+SFILE:'
+
+export PRE_ERR PRE_DIR PRE_OMIT PRE_CFILE PRE_SFILE
+
+TMP1=".,BUILDM1-$$"
+TMP2=".,BUILDM2-$$"
+trap "rm -f $TMP1 $TMP2; exit" 1 2 3
+
+#
+# Parse arguments and generate input to the script below
+#
+
+if test $# -lt 2; then
+	echo "$MSG1" >&2
+	echo "$MSG2" >&2
+	exit 1
+fi
+
+# iterate through dirspecs
+
+(
+ > $TMP1
+ > $TMP2
+
+ while test $# -gt 0; do
+
+    # parse -s and get directory name
+
+    if test $# -lt 2; then
+	echo "$PRE_ERR"
+	echo "$MSG1" >&2
+	echo "$MSG2" >&2
+	exit 1
+    fi
+ 
+   case "x$1" in
+        x-s)	DIR="$2"
+		# verify that directory exists
+		if test  -d $DIR; then
+			echo "$PRE_DIR$DIR"
+		else
+			echo "$PRE_ERR"
+			echo "cannot find a source directory named $DIR" >&2
+			exit 1
+		fi
+		shift; shift
+		;;
+	   *)	echo 'expecting -s at start of directory specification' >&2
+		echo "$PRE_ERR"
+		echo "$MSG1" >&2
+		echo "$MSG2" >&2
+		;;
+    esac
+
+    #
+    # See if DIR contains any .c or .[sS] files
+    #
+    if test "x$DIR" = "x."; then
+	CFILES=`ls *.c    2>$TMP1`
+	SFILES=`ls *.[sS] 2>$TMP2`
+    else
+	CFILES=`ls $DIR/*.c    2>$TMP1`
+	SFILES=`ls $DIR/*.[sS] 2>$TMP2`
+    fi
+
+    if test -s $TMP1 -a -s $TMP2; then
+	(echo;echo "Warning: directory $DIR does not contain any .c or .[sS] files to compile";echo) >&2
+    fi
+    rm -f $TMP1 $TMP2
+
+    # arguments up to the next -s as patterns that specify omitted files
+
+    LOOKING=true
+    while $LOOKING; do
+	if test $# -eq 0; then
+		LOOKING=false
+	elif test "x$1" = "x-s"; then
+		LOOKING=false
+	else
+		echo "$PRE_OMIT$1"
+		shift
+	fi
+    done
+
+    # output .s and .S files for this directory
+
+    if test "x$SFILES" != "x"; then
+	for i in $SFILES; do
+		echo "$PRE_SFILE$i"
+	done
+    fi
+
+    # output .c files for this directory
+
+    if test "x$CFILES" != "x"; then
+	for i in $CFILES; do
+		echo "$PRE_CFILE$i"
+	done
+    fi
+
+ done
+) |
+
+gawk '
+
+#########################################################################
+#									#
+#									#
+#			Start of awk script				#
+#									#
+#									#
+#########################################################################
+
+####################
+#
+# function ftmlist - format a list of file names
+#
+# args are: number of names, array of names, maximum name length,
+#		directory name, prefix to use
+#
+####################
+
+function fmtlist(n,items,maxl,dname, pfix) {
+
+	if (n <= 0) {
+		return;
+	}
+
+	if (doneheading == 0) {
+		printf("\n\n%s\n%s\n%sDirectory %s\n%s\n%s\n",hdr4, hdr5, hdr6, dname, hdr5, hdr4);
+		doneheading = 1;
+	}
+	fmt2 = sprintf("\n%%-%ds\\\n",maxwid-1);
+	printf(fmt2, pfix " =");
+
+	namwid = maxl + 2;
+	#
+	# compute number of names per line allowing 2 blanks between them
+	#		and not taking more than actwid characters
+	#
+	nperline = int( (actwid+2)/(maxl+2) );
+	extrabl = actwid-(nperline*maxl + 2*(nperline-1))+1;
+	cnt = 1;
+	fmt = sprintf("%%-%ds",maxl);
+	for (i=1; i<=n ; i++) {
+		if (cnt > nperline) {
+			for (b=1; b<=extrabl; b++) {
+				printf(" ");
+			}
+			printf("\\\n");
+			cnt = 1;
+		}
+		if (cnt == 1) {
+			printf("%s", tb);
+		} else {
+			printf("  ");
+		}
+		printf(fmt, items[i]);
+		cnt++;
+	}
+	printf("\n");
+	return;
+}
+
+####################
+#
+# function isomitted - check a file name against the list of omitted patters
+#			for the current directory and report 1 if the file
+#			name is omitted
+#
+# arg: file name to check
+#
+# globals used: nomits, omits[] list of omitted	patterns (1 through nomits)
+#
+####################
+
+function isomitted(io_fname) {
+
+	io_flen = length(io_fname);
+
+	#
+	# Iterate through all omit patterns for the current directory
+	#
+
+	for (io_j=1; io_j <= nomits; io_j++) {
+
+		# Get pattern to check
+		io_omit =  omits[io_j];
+
+		# length of omit pattern
+		io_olen = length(io_omit);
+
+		# Find where "*" occurs in the pattern and set prefix length
+
+		io_plen = index(io_omit, "*") - 1;
+
+		if (io_plen < 0) {		# No * in the pattern, so check exact match
+
+			if (io_fname == io_omit) {
+				return 1;
+			} else {
+				continue;
+			}
+
+		}
+
+		# At least one * occurs in the pattern
+
+		if (io_olen == 1) {		# Pattern is just a *, so omit everything
+			return 1;
+		}
+
+		if (io_plen > 1) {		# if fixed prefix exists, check for match
+
+			# A file name shorter than the prefix is not omitted
+
+			if (io_flen < io_plen) {
+				continue;
+			}
+
+			# If prefix does not match, name is not omitted
+
+			if ( substr(io_omit, 1, io_plen) != substr(io_fname, 1, io_plen) ) {
+				continue;
+			}
+		}
+
+		# Prefix has matched; check suffix
+
+		io_slen = io_olen - io_plen -1;
+
+		if (io_slen <= 0) {	# If no suffix, pattern matches
+			return 1;
+		}
+
+		# A file name shorter than the suffix is not omitted
+
+		if (io_flen < io_slen) {
+			continue;
+		}
+
+		# If suffix in omit pattern exactly matches the suffix of the
+		#	file name, this file name is omitted
+
+		if ( substr(io_omit,  io_olen          - (io_slen - 1)) == \
+		     substr(io_fname, length(io_fname) - (io_slen - 1)) ) {
+			return 1;
+		}
+
+	}
+
+	# The file name does not match any omitted pattern, so keep it
+
+	return 0;
+}
+
+####################
+#
+# getbasename - extract the basename from a path name and return it
+#
+# arg: path name
+#
+####################
+
+function getbasename(gb_path) {
+
+	for (gb_pos = length(gb_path); gb_pos > 0; gb_pos--) {
+		if (substr(gb_path, gb_pos, 1) == "/") {
+			break;
+		}
+	}
+	if (gb_pos > 0) {
+		return substr(gb_path, gb_pos+1);
+	} else {
+		return gb_path;
+	}
+}
+
+
+####################
+#
+# Initialize variables for the awk script
+#
+####################
+
+BEGIN {
+	ndirs = 0;		# Number of directories found so far
+	maxwid = 81;		# Maximum width of formatted line
+	actwid = maxwid - 10;	# Actual width for names (line width minus 8 for tab indent and
+				#		2 for " \" at the end of the line)
+
+	tb = "	";	# Tab character
+	plen_err = length("'$PRE_ERR'");
+	plen_dir = length("'$PRE_DIR'");
+	plen_omt = length("'$PRE_OMIT'");
+	plen_cfl = length("'$PRE_CFILE'");
+	plen_sfl = length("'$PRE_SFILE'");
+
+
+	hdr1 = "#-------------------------------------------------------------------------------#";
+	hdr2 = "#										#";
+	hdr3 = "#     Definitions generated by build-make on '"`date`"'	#";
+	hdr4 = "#------------------------------------------------------------------";
+	hdr5 = "#";
+	hdr6 = "#  ";
+	hdr7 = "#    		     Rules For Generating Object Files 				#";
+	hdr8 = "#  Rules for files in directory ";
+
+	msg1 = "SRC_CFILES =";
+	msg2 = "SRC_SFILES =";
+	msg3 = "OBJ_FILES  =";
+}
+
+#
+# Skip blank lines in input
+#
+/^ *$/ {
+	next;
+}
+
+#
+# Handle errors
+#
+/^\'${PRE_ERR}'/ {
+	exit(1);
+}
+
+#
+# Start a new directory
+#
+
+/^\'$PRE_DIR'/ {
+
+	ndirs++;
+	dirs[ndirs] = substr($0,plen_dir+1);
+
+	# Initialize counts for this directory
+
+	ncfiles[ndirs] = 0;
+	nsfiles[ndirs] = 0;
+	nomits = 0;
+	next;
+}
+
+#
+# Collect list of omitted files for this directory (must occur in the input before
+#	any C or S files for the directory)
+#
+
+/^\'$PRE_OMIT'/ {
+
+	nomits++;
+	omits[nomits] = substr($0,plen_omt+1);
+	next;
+}
+
+#
+# Handle a C file from the current directory
+#
+
+/^\'$PRE_CFILE'/ {
+
+	fullname = substr($0,plen_cfl+1);
+	basename = getbasename(fullname);
+
+	# Skip omitted files
+
+	if (isomitted(basename) > 0) {
+		next;
+	}
+
+	ncfiles[ndirs]++;
+	cpath[ndirs "%" ncfiles[ndirs]] = fullname;
+	cfile[ndirs "%" ncfiles[ndirs]] = basename;
+
+	next;
+}
+
+#
+# Handle as S file from the current directory
+#
+
+/^\'$PRE_SFILE'/ {
+
+	fullname = substr($0,plen_sfl+1);
+	basename = getbasename(fullname);
+
+	# Skip omitted files
+
+	if (isomitted(basename) > 0) {
+		next;
+	}
+
+	nsfiles[ndirs]++;
+	spath[ndirs "%" nsfiles[ndirs]] = fullname;
+	sfile[ndirs "%" nsfiles[ndirs]] = basename;
+
+	next;
+}
+
+
+#
+# Any other input line is unexpected
+#
+
+{
+	print "Error: unexpected input line ->", $0;
+	exit 1;
+}
+
+END {
+	#################################################################
+	#								#
+	#    Do all the work of formatting and printing the makefile	#
+	# rules.  Start by printing an initial comment block and the	#
+	# variable initializtion statements.				#
+	#								#
+	#################################################################
+
+	printf("%s\n%s\n%s\n%s\n%s\n\n",hdr1, hdr2, hdr3, hdr2, hdr1);
+	printf("%s\n%s\n\n",msg1, msg2, msg3);
+
+	totlen = 0;	# max over valid source file names in all directories
+
+	#################################################################
+	#								#
+	# Iterate over all directories and generate a unique prefix	#
+	# to be used on make variables for each directory		#
+	#								#
+	#################################################################
+
+	totlen = 0;	# max file name length across all directories
+
+	for (d=1; d<=ndirs; d++) {
+
+	    # Generate a unique variable name prefix for this directory
+
+	    dirpath = dirs[d];
+	    strt = 1;
+	    str = toupper(dirpath);
+	    finish = length(str);
+	    ch = substr(str,strt,1);
+	    while ( (ch == ".") || (ch == "/") ) {
+		strt++;
+		if (strt > finish) {
+			break;
+		}
+		ch = substr(str,strt,1);
+	    }
+	    if (strt > finish) {
+		if (substr(str,1,1) == ".") {
+			prefix = "DOT";
+		} else {
+			prefix = "SLASH";
+		}
+		for (i=2; i<=finish; i++) {
+			if (substr(str,i,1) == ".") {
+				prefix = prefix "_DOT";
+			} else {
+				prefix = prefix "_SLASH";
+			}
+		}
+	    } else {
+		prefix = "";
+		for (i=strt; i<=finish; i++) {
+			ch = substr(str,i,1);
+			if (ch == "/") {
+				prefix = prefix "_";
+			} else {
+				prefix = prefix ch;
+			}
+		}
+	    }
+	    pref[d] = prefix;
+
+	    doneheading = 0;
+
+	    #
+	    # Compute the maximum length of a file name in this directory
+	    #		and update the max length across all directories
+	    #
+
+	    maxlen = 0;		# max file name length for this directory
+
+	    # Check S files first
+
+	    for (i = 1; i <= nsfiles[d]; i++) {
+		srcsfiles[i] = sfile[d "%" i]
+		l = length(srcsfiles[i]);
+		if (l > maxlen) {
+			maxlen = l;
+		}
+	    }
+	    if (maxlen > totlen) {	# update global max across all directories
+		totlen = maxlen;
+	    }
+
+	    # Check C files
+
+	    for (i = 1; i <= ncfiles[d]; i++) {
+		srccfiles[i] = cfile[d "%" i]
+		l = length(srccfiles[i]);
+		if (l > maxlen) {
+			maxlen = l;
+		}
+	    }
+	    if (maxlen > totlen) {	# update global max across all directories
+		totlen = maxlen;
+	    }
+
+	    # Format the list of S files for this directory
+
+	    fmtlist(nsfiles[d], srcsfiles, maxlen, dirs[d], pref[d] "_SFILES");
+
+	    # Format the list of C files for this directory
+
+	    fmtlist(ncfiles[d], srccfiles, maxlen, dirs[d], pref[d] "_CFILES");
+
+	    printf("\n");
+
+	    #
+	    # Generate assignments for Makefile variables
+	    #
+
+	    nasn = 0;
+
+	    #
+	    # Generate assignments for variables  SRC_CFILES and SRC_SFILES
+	    #
+	    if (ncfiles[d] > 0) {
+		nasn++;
+		asnl[nasn] = "SRC_CFILES";
+		asnr[nasn] = sprintf("+= ${%s_CFILES}", pref[d]);
+	    }
+	    if (nsfiles[d] > 0) {
+		nasn++;
+		asnl[nasn] = "SRC_SFILES";
+		asnr[nasn] = sprintf("+= ${%s_SFILES}", pref[d]);
+	    }
+
+	    #
+	    # Generate assignments for variables  prefix_CFULL and prefix_SFULL
+	    #
+
+	    if (ncfiles[d] > 0) {
+		nasn++;
+		asnl[nasn] = sprintf("%s_CFULL", prefix);
+		asnr[nasn] = sprintf("+= ${%s_CFILES:%%=%s/%%}", pref[d], dirs[d]);
+	    }
+	    if (nsfiles[d] > 0) {
+		nasn++;
+		asnl[nasn] = sprintf("%s_SFULL", prefix);
+		asnr[nasn] = sprintf("+= ${%s_SFILES:%%=%s/%%}", pref[d], dirs[d]);
+	    }
+
+	    #
+	    # Generate assignments for variables  SRC_CFULL and SRC_SFULL
+	    #
+
+	    if (ncfiles[d] > 0) {
+		nasn++;
+		asnl[nasn] = "SRC_CFULL";
+		asnr[nasn] = sprintf("+= ${%s_CFULL}", pref[d]);
+	    }
+	    if (nsfiles[d] > 0) {
+		nasn++;
+		asnl[nasn] = "SRC_SFULL";
+		asnr[nasn] = sprintf("+= ${%s_SFULL}", pref[d]);
+	    }
+	    wid = 0;
+	    for (i=1; i<=nasn; i++) {
+		n = length(asnl[i]);
+		if (n > wid) {
+			wid = n;
+		}
+	    }
+	    fmt3 = sprintf("%%-%ds %%s\n", wid);
+	    for (i=1; i<=nasn; i++) {
+		printf(fmt3, asnl[i], asnr[i]);
+	    }
+	}
+
+	printf("\n\n%s\n%s\n%s\n%s\n%s\n\n", hdr1, hdr2, hdr7, hdr2, hdr1);
+
+	printf("OBJ_TMP     = ${patsubst %%.s,%%.o,$(SRC_SFILES)}    #	substitute .s => .o\n");
+	printf("OBJ_SFILES  = ${patsubst %%.S,%%.o,$(OBJ_TMP)}       #	substitute .S => .o\n");
+        printf("OBJ_CFILES  = ${patsubst %%.c,%%.o,$(SRC_CFILES)}    #	substitute .c => .o\n");
+	printf("OBJ_LIST    = ${OBJ_CFILES} ${OBJ_SFILES}\n");
+	printf("OBJ_FILES   = ${OBJ_LIST:%%=binaries/%%}\n");
+	printf("SRC_FULL    = ${SRC_CFULL} ${SRC_SFULL}\n");
+
+	fmt4c = sprintf("%%-%ds%%s\n\t${CC} ${CFLAGS} -o %%s %%s\n",9+totlen+3);
+	fmt4s = sprintf("%%-%ds%%s\n\t${CC} ${CFLAGS} -o %%s %%s\n",9+totlen+3);
+	for (d=1; d<=ndirs; d++) {
+	    needheadings = 1;
+
+	    # print dependencies for .s files
+
+	    for (i = 1; i <= nsfiles[d]; i++) {
+		if (needheadings > 0) {
+			printf("\n%s\n%s%s\n%s\n\n", hdr4, hdr8, dirs[d], hdr4);
+			needheadings = 0;
+		}
+		fname = sfile[d "%" i];
+		tmpobj = "binaries/" substr(fname, 1, length(fname)-2) ".o";
+		tmpsrc = dirs[d] "/" fname;
+		printf(fmt4s, tmpobj ":", tmpsrc, tmpobj, tmpsrc);
+            }
+
+	    # print dependencies for .c files
+
+	    for (i = 1; i <= ncfiles[d]; i++) {
+		if (needheadings > 0) {
+			printf("\n%s\n%s%s\n%s\n\n", hdr4, hdr8, dirs[d], hdr4);
+			needheadings = 0;
+		}
+		fname = cfile[d "%" i];
+		tmpobj = "binaries/" substr(fname, 1, length(fname)-2) ".o";
+		tmpsrc = dirs[d] "/" fname;
+		printf(fmt4c, tmpobj ":", tmpsrc, tmpobj, tmpsrc);
+            }
+	    
+	}
+	printf("\nobjs:	${OBJ_FILES}\n");
+
+	printf("\nlist_obj:\n\t@echo ${OBJ_FILES}\n");
+
+	printf("\nlist_csrc:\n\t@echo ${SRC_CFILES}\n");
+
+	printf("\nlist_ssrc:\n\t@echo ${SRC_SFILES}\n");
+
+	printf("\n# Export variables for recursive make calls (such as the library)\n\nexport\n\n");
+} '
diff --git a/compile/bin/mkvers b/compile/bin/mkvers
new file mode 100755
index 0000000..2055392
--- /dev/null
+++ b/compile/bin/mkvers
@@ -0,0 +1,27 @@
+#!/bin/sh
+#
+# Generate a new version string to be printed at startup
+#
+# Use is:   mkvers platform_name
+
+VERS_NUM_FILE=.vers_num
+
+case $# in
+    1)	PLAT="$1"
+	;;
+    *)	echo 'use is:  mkvers platform_name' >&2
+	exit 1
+	;;
+esac
+		
+if test -s $VERS_NUM_FILE; then
+	OLD_VERS=`cat $VERS_NUM_FILE`
+	VERS=`expr $OLD_VERS + 1`
+else
+	VERS=1
+fi
+echo $VERS > $VERS_NUM_FILE
+if test "x$USER" = "x"; then
+       USER=`who am i | sed 's/ .*//'`
+fi
+echo "Xinu for $PLAT -- version #$VERS  ($USER)  `date`"
diff --git a/compile/binaries/getchar.o b/compile/binaries/getchar.o
new file mode 100644
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literal 0
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diff --git a/compile/binaries/putchar.o b/compile/binaries/putchar.o
new file mode 100644
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GIT binary patch
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diff --git a/compile/binaries/qsort.o b/compile/binaries/qsort.o
new file mode 100644
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zH&A#VypEf~z6RK{1Nm>jse@3y)0{WuCxAV-;a7n=Ho$TKHNSxWLv!j>0#<$lxTU#K
zb86OuQ_}~(9k4X-*Lf#=D?pt%{6ji_6n>xP&%*ZrT<eAA)8Opq4A1F2(lVy=oHJ_c
znE>YuAHo}&zYYHeKuzAqx4^0SCisFa|A8(4sm^=Rb6w}T*KKf~o#*{ab4bbGn!^?L
zw|={N6s>*57ke=r9~gv>M~i;MV$smpfDhL&F23P`_<;C$%X~wTa5!|7_u~JW7mb{O
z_mdU?JRDFPYc#(5IEL&6XqylO&{qY{9@bpI4juEnv_6{_V@t0U+zHtGs9~Aa=SPB^
z?*ol`{9m$+HKG=<v{>7R1MMNvX6ez}M;b=Zh9qa<>%bZ4`Cn+)JBQ#U<SeuF{sC80
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HcmV?d00001

diff --git a/compile/original/Makefile.orig b/compile/original/Makefile.orig
new file mode 100644
index 0000000..1a78272
--- /dev/null
+++ b/compile/original/Makefile.orig
@@ -0,0 +1,189 @@
+#########################################################################
+#									#
+#									#
+#  Makefile for STM32 version of the Xinu operating system		#
+#									#
+#  includes: .deps and .defs						#
+#									#
+#									#
+#########################################################################
+
+COMPILER_ROOT	=	avr-
+PNAME		=	ATMEGA328P
+PLAT		=	Platform_$(PNAME)
+TOPDIR		=	..
+
+CC		=	${COMPILER_ROOT}gcc
+LD		=	${COMPILER_ROOT}gcc
+OBJCOPY		=	${COMPILER_ROOT}objcopy
+OBJDUMP		=	${COMPILER_ROOT}objdump
+QEMU		=	/home/lechnerm/rafa/xinu/qemu_stm32/arm-softmmu/qemu-system-arm
+XINU		=	$(TOPDIR)/compile/xinu.elf
+XINUBIN		=	$(TOPDIR)/compile/xinu.bin
+XINUBOOT	=	$(TOPDIR)/compile/xinu
+BUILDMAKE	=	$(TOPDIR)/compile/bin/build-make
+MKVERS		=	$(TOPDIR)/compile/bin/mkvers
+
+MAKEDEP		=	$(CC) -M -MG
+
+DEPSFILE	=	.deps
+DEFSFILE	=	.defs
+VERSIONFILE	=	version
+# RAFA LDSCRIPT	=	ld.script
+MKVERS		=	$(TOPDIR)/compile/bin/mkvers
+REBUILDFLAGS	=	-s $(TOPDIR)/system  debug.c 	\
+			-s $(TOPDIR)/lib			\
+			-s $(TOPDIR)/device/tty			\
+			-s $(TOPDIR)/device/nam			\
+			# RAFA -s $(TOPDIR)/device/ram			\
+			-s $(TOPDIR)/device/gpio			\
+			-s $(TOPDIR)/device/spi			\
+			#
+			-s $(TOPDIR)/shell  'xsh_rdstest*'
+
+INCLUDE		=	-I$(TOPDIR)/include
+DEFS		= 	-DBSDURG -DVERSION=\""`cat $(VERSIONFILE)`"\"
+
+# Compiler flags
+# CFLAGS  = -mcpu=cortex-m3 -mno-unaligned-access -mthumb -fno-builtin -fno-stack-protector -nostdlib -c -Wall -O ${DEFS} ${INCLUDE}
+CFLAGS  = -DF_CPU=16000000UL -mmcu=atmega328p -mrelax -fno-builtin -fno-stack-protector -nostdlib -c -Wall -Os ${DEFS} ${INCLUDE}
+SFLAGS  = ${INCLUDE}
+
+# Loader flags
+
+# RAFA LDFLAGS = -dn -m armelf -Map xinu.map -T ld.script
+LDFLAGS = -Wl,--wrap,malloc,--wrap,free,--wrap,realloc,--wrap,fdevopen
+
+all:	xinu
+
+#--------------------------------------------------------------------------------
+# Handle generation of a new version string when initialize is recompiled
+#--------------------------------------------------------------------------------
+
+newversion:
+	@echo creating new version
+	@$(MKVERS) $(PNAME) > version
+
+#--------------------------------------------------------------------------------
+# Include generic make targets and rules from the file generated by build-make
+#--------------------------------------------------------------------------------
+-include $(DEFSFILE)
+
+#--------------------------------------------------------------------------------
+# Add files that require special rules and place start.o at the front
+#--------------------------------------------------------------------------------
+# RAFA quitamos el start.S y start.o porque intentaremos el startup de avr
+# RAFA LD_LIST = binaries/start.o $(filter-out binaries/start.o,$(OBJ_FILES))
+LD_LIST = $(filter-out binaries/start.o,$(OBJ_FILES))
+
+#------------------------------------------------------------
+# Rules for files that need special handling
+#------------------------------------------------------------
+
+# Define variables for the Configuration file and generated files
+
+CONFFILE	= $(TOPDIR)/config/Configuration
+CONFH		= $(TOPDIR)/include/conf.h
+CONFC		= $(TOPDIR)/system/conf.c
+
+# Define variables for the config program and its sources
+
+CONFPGM		= $(TOPDIR)/config/config
+CONFL		= $(TOPDIR)/config/config.l
+CONFY		= $(TOPDIR)/config/config.y
+
+# Set up the required build directory structure
+
+BLDDIRS	= binaries
+export
+
+#--------------------------------------------------------------------------------
+# Specific additional rules and exceptions
+#--------------------------------------------------------------------------------
+
+xinu:	Makefile rebuild $(BLDDIRS) $(DEFSFILE) $(DEPSFILE) $(CONFH) $(CONFC) $(LD_LIST)
+	@echo;echo 'Loading object files to produce xinu'
+	# RAFA original : @$(LD) $(LDFLAGS) $(LD_LIST) -o $(XINU) -L/usr/lib/gcc/arm-none-eabi/6.3.1/ --print-memory-usage
+	@$(LD) $(LDFLAGS) -T ld.script $(LD_LIST) -o $(XINU) 
+	@echo "Creating Binary..."
+	@$(OBJCOPY) -O binary $(XINU) $(XINUBIN)
+
+examine-all:
+	$(OBJDUMP) -D $(XINU) | less
+
+examine-header:
+	$(OBJDUMP) -x $(XINU) | less
+
+flash:
+	stm32flash -w $(XINUBIN) -v /dev/ttyUSB0
+
+qemu:
+	$(QEMU) -serial stdio -M stm32-f103c8 -kernel $(XINUBIN) 
+monitor:
+	$(QEMU) -monitor stdio -serial stdio -M stm32-f103c8 -kernel $(XINUBIN) 
+
+$(BLDDIRS): 
+	@mkdir -p $(BLDDIRS)
+
+objects: $(LD_LIST)
+
+$(CONFH): $(CONFFILE) $(CONFPGM)
+	@echo making $(CONFH)
+	@make configure
+
+$(CONFC): $(CONFFILE) $(CONFPGM)
+	@echo making $(CONFC)
+	@make configure
+
+$(CONFPGM): $(CONFL) $(CONFY)
+	@echo making the config program
+	@make -C $(TOPDIR)/config clean all install
+
+configure:
+	@echo forcing a rebuild of conf.h and conf.c
+	@make newversion
+	@(cd $(TOPDIR)/config; make install)
+
+clean:
+	@echo removing .o files
+	@rm -f ${LD_LIST}
+	@echo   removing configuration files ...
+	@rm -f $(CONFH) $(CONFC)
+	@(cd $(TOPDIR)/config; make clean)
+	@echo removing xinu ...
+	@rm -f $(XINU)
+	@rm -f $(XINUBIN)
+	@rm -f $(XINUBOOT)
+
+#--------------------------------------------------------------------------------
+# Locations of source directories and exceptions (.c and .[sS] files to exclude)
+#--------------------------------------------------------------------------------
+	
+$(DEFSFILE):
+	@rm -f $(DEFSFILE)
+	@echo "" > $(DEFSFILE)
+	@make rebuild
+
+$(DEPSFILE):
+	@rm -f $(DEPSFILE)
+	@echo "" > $(DEPSFILE)
+	@make depend
+
+rebuild: $(CONFC)
+	@echo Rebuilding the $(DEFSFILE) file
+	@$(BUILDMAKE) $(REBUILDFLAGS) > $(DEFSFILE)
+
+defclean:
+	rm -f $(DEFSFILE)
+	echo "" > $(DEFSFILE)
+
+depend: $(DEFSFILE)
+	@echo;echo Making all dependencies in $(DEPSFILE)
+	@$(MAKEDEP) ${INCLUDE} ${SRC_FULL} > $(DEPSFILE)
+	@echo;echo Finished making dependencies
+
+depclean:
+	rm -f $(DEPSFILE)
+	echo "" > $(DEPSFILE)
+
+-include $(DEPSFILE)
diff --git a/compile/original/flash.sh b/compile/original/flash.sh
new file mode 100755
index 0000000..61178bd
--- /dev/null
+++ b/compile/original/flash.sh
@@ -0,0 +1 @@
+~/rafa/stm32flash/stm32flash -w xinu.bin -S 0x8000000 -v -g 0x8000000 -b 115200 /dev/ttyUSB0
diff --git a/compile/original/ld.script b/compile/original/ld.script
new file mode 100644
index 0000000..45e7543
--- /dev/null
+++ b/compile/original/ld.script
@@ -0,0 +1,135 @@
+/* Linker script for ATMEL(R) AVR(R) ATmega328P. */
+
+OUTPUT_FORMAT("elf32-avr","elf32-avr","elf32-avr")
+OUTPUT_ARCH(avr:5)
+
+/* The beginning and end of the program ROM area. */
+/* Leave 4 bytes for the 32-bit checksum plus 0x10 extra bytes free. */
+_rom_begin = 0x00000000;
+_rom_end   = 0x00007FEC;
+
+/* The beginning and end (i.e., top) of the stack */
+/* Set up a stack with a size of (1/2)K */
+_stack_begin = 0x800500;
+_stack_end   = 0x8008FF;  /* RAFA, en atmega328 el fin de la RAM */
+
+/* The end of the 2K RAM stack */
+__initial_stack_pointer = 0x8008FF;
+
+MEMORY
+{
+  ROM(rx)   : ORIGIN = 0, LENGTH = 32K
+  RAM(rw!x) : ORIGIN = 0x800100, LENGTH = 2K
+}
+
+SECTIONS
+{
+  . = 0x0;
+  . = ALIGN(2);
+
+  .text :
+  {
+    /* RAFA _*/
+    text = ABSOLUTE(.);         /* text: beginning of text segment      */
+
+    *(.vectors)
+    KEEP(*(.vectors))
+
+   /*Init sections were here*/
+    /* From this point on, we don't bother about wether the insns are
+       below or above the 16 bits boundary.  */
+    *(.init0)  /* Start here after reset.  */
+    __ctors_end = .;
+    KEEP (*(.init0))
+    *(.init1)
+    KEEP (*(.init1))
+    *(.init2)  /* Clear __zero_reg__, set up stack pointer.  */
+    KEEP (*(.init2))
+    *(.init3)
+    KEEP (*(.init3))
+    *(.init4)  /* Initialize data and BSS.  */
+    KEEP (*(.init4))
+    *(.init5)
+    KEEP (*(.init5))
+    *(.init6)  /* C++ constructors.  */
+    KEEP (*(.init6))
+    *(.init7)
+    KEEP (*(.init7))
+    *(.init8)
+    KEEP (*(.init8))
+    *(.init9)  /* Call main().  */
+    KEEP (*(.init9))
+
+    *(.def_isr)
+    KEEP(*(.def_isr))
+
+
+
+
+
+
+    *(.progmem*)
+    . = ALIGN(2);
+    *(.text)
+    . = ALIGN(2);
+    *(.text*)
+    . = ALIGN(2);
+    etext = ABSOLUTE(.) ;       /* etext: end of text                   */
+
+
+  } > ROM
+
+  .text :
+  {
+    . = ALIGN(0x10);
+  } > ROM = 0xAAAA
+
+  .= 0x800100;
+  . = ALIGN(2);
+
+  /* The ROM-to-RAM initialized data section */
+  .data :
+  {
+   data = ABSOLUTE(.);         /* data: beginning of data segment      */
+   __data = ABSOLUTE(.);         /* data: beginning of data segment      */
+
+    _data_begin = .;
+    *(.data)
+    . = ALIGN(2);
+    KEEP (*(.data))
+    *(.data*)
+    . = ALIGN(2);
+    KEEP (*(.data*))
+    *(.rodata)  /* Do *NOT* move this! Include .rodata here if gcc is used with -fdata-sections. */
+    . = ALIGN(2);
+    KEEP (*(.rodata))
+    *(.rodata*)
+    . = ALIGN(2);
+    KEEP (*(.rodata*))
+    __data_end = .;
+
+    __data_start = .;
+    __data_load_start = .;
+    __bss_start = .;
+
+  } > RAM AT > ROM
+
+  /* The uninitialized (zero-cleared) data section */
+  .bss :
+  {
+   __bss = ABSOLUTE(.);          /* bss: beginning of bss segment        */
+
+    *(.bss)
+    . = ALIGN(2);
+    KEEP (*(.bss))
+    *(.bss*)
+    . = ALIGN(2);
+    KEEP (*(.bss*))
+
+    __bss_end = ABSOLUTE(.);         /* _end: end of image                   */
+
+  } > RAM
+
+  _rom_data_begin = LOADADDR(.data);
+  __data_load = LOADADDR(.data);
+}
diff --git a/compile/original/ld.script.avr b/compile/original/ld.script.avr
new file mode 100644
index 0000000..70438e0
--- /dev/null
+++ b/compile/original/ld.script.avr
@@ -0,0 +1,135 @@
+/* Linker script for ATMEL(R) AVR(R) ATmega328P. */
+
+OUTPUT_FORMAT("elf32-avr","elf32-avr","elf32-avr")
+OUTPUT_ARCH(avr:5)
+
+/* The beginning and end of the program ROM area. */
+/* Leave 4 bytes for the 32-bit checksum plus 0x10 extra bytes free. */
+_rom_begin = 0x00000000;
+_rom_end   = 0x00007FEC;
+
+/* The beginning and end (i.e., top) of the stack */
+/* Set up a stack with a size of (1/2)K */
+_stack_begin = 0x800500;
+_stack_end   = 0x8008FF;  /* RAFA, en atmega328 el fin de la RAM */
+
+/* The end of the 2K RAM stack */
+__initial_stack_pointer = 0x8008FF;
+
+MEMORY
+{
+  ROM(rx)   : ORIGIN = 0, LENGTH = 32K
+  RAM(rw!x) : ORIGIN = 0x800100, LENGTH = 2K
+}
+
+SECTIONS
+{
+  . = 0x0;
+  /* RAFA . = ALIGN(2); */
+
+  /* ISR vectors */
+  .isr_vector :
+  {
+    *(.isr_vector)
+    . = ALIGN(0x10);
+    KEEP(*(.isr_vector))
+  } > ROM = 0xAAAA
+
+  /* Startup code */
+  .startup :
+  {
+    *(.startup)
+    . = ALIGN(0x10);
+    KEEP(*(.startup))
+  } > ROM = 0xAAAA
+
+  /* Program code (text), read-only data and static ctors */
+  .text :
+  {
+    /* RAFA _*/
+   	text = ABSOLUTE(.);         /* text: beginning of text segment      */
+
+	__muluhisi3 = .;
+	start = .;
+	__do_copy_data = .;
+	__do_clear_bss = .;
+	_/* _data_end = .; */
+	__data_load_start = .;
+	__bss_end = .;
+	__bss_start = .;
+	__data_start = .;
+
+    /* FIN DE RAFA */
+    _ctors_begin = .;
+    *(.ctors)
+    . = ALIGN(2);
+    KEEP (*(SORT(.ctors)))
+    _ctors_end = .;
+    *(.progmem*)
+    . = ALIGN(2);
+    *(.trampolines*)
+    . = ALIGN(2);
+    *(.text)
+    . = ALIGN(2);
+    *(.text*)
+    . = ALIGN(2);
+    etext = ABSOLUTE(.) ;       /* etext: end of text                   */
+
+  } > ROM
+
+  .text :
+  {
+    . = ALIGN(0x10);
+  } > ROM = 0xAAAA
+
+  .= 0x800100;
+  . = ALIGN(2);
+
+  /* The ROM-to-RAM initialized data section */
+  .data :
+  {
+   data = ABSOLUTE(.);         /* data: beginning of data segment      */
+
+    _data_begin = .;
+    *(.data)
+    /* rafa . = ALIGN(2); */
+    . = ALIGN(1);
+    KEEP (*(.data))
+    *(.data*)
+    /* RAafa . = ALIGN(2); todos los demas tambien */
+    . = ALIGN(1);
+    KEEP (*(.data*))
+    *(.rodata)  /* Do *NOT* move this! Include .rodata here if gcc is used with -fdata-sections. */
+    . = ALIGN(1);
+    KEEP (*(.rodata))
+    *(.rodata*)
+    . = ALIGN(1);
+    KEEP (*(.rodata*))
+    _data_end = .;
+
+   edata = ABSOLUTE(.) ;       /* edata: end of data                   */   
+  } > RAM AT > ROM
+
+  /* The uninitialized (zero-cleared) data section */
+  .bss :
+  {
+   bss = ABSOLUTE(.);          /* bss: beginning of bss segment        */
+
+    _bss_begin = .;
+    *(.bss)
+    . = ALIGN(1);
+    KEEP (*(.bss))
+    *(.bss*)
+    . = ALIGN(1);
+    KEEP (*(.bss*))
+    _bss_end = .;
+
+ ebss = ABSOLUTE(.) ;        /* ebss: end of bss                     */
+
+   end = ABSOLUTE(.);          /* end: end of image                    */
+    _end = ABSOLUTE(.);         /* _end: end of image                   */
+
+  } > RAM
+
+  _rom_data_begin = LOADADDR(.data);
+}
diff --git a/compile/original/ld.script.avr.baremetal b/compile/original/ld.script.avr.baremetal
new file mode 100644
index 0000000..422686c
--- /dev/null
+++ b/compile/original/ld.script.avr.baremetal
@@ -0,0 +1,105 @@
+/* Linker script for ATMEL(R) AVR(R) ATmega328P. */
+
+OUTPUT_FORMAT("elf32-avr","elf32-avr","elf32-avr")
+OUTPUT_ARCH(avr:5)
+
+/* The beginning and end of the program ROM area. */
+/* Leave 4 bytes for the 32-bit checksum plus 0x10 extra bytes free. */
+_rom_begin = 0x00000000;
+_rom_end   = 0x00007FEC;
+
+/* The beginning and end (i.e., top) of the stack */
+/* Set up a stack with a size of (1/2)K */
+_stack_begin = 0x800500;
+_stack_end   = 0x800800;
+
+/* The end of the 2K RAM stack */
+__initial_stack_pointer = 0x800800;
+
+MEMORY
+{
+  ROM(rx)   : ORIGIN = 0, LENGTH = 32K - 0x14
+  RAM(rw!x) : ORIGIN = 0x800100, LENGTH = 0x0800
+}
+
+SECTIONS
+{
+  . = 0x0;
+  . = ALIGN(2);
+
+  /* ISR vectors */
+  .isr_vector :
+  {
+    *(.isr_vector)
+    . = ALIGN(0x10);
+    KEEP(*(.isr_vector))
+  } > ROM = 0xAAAA
+
+  /* Startup code */
+  .startup :
+  {
+    *(.startup)
+    . = ALIGN(0x10);
+    KEEP(*(.startup))
+  } > ROM = 0xAAAA
+
+  /* Program code (text), read-only data and static ctors */
+  .text :
+  {
+    _ctors_begin = .;
+    *(.ctors)
+    . = ALIGN(2);
+    KEEP (*(SORT(.ctors)))
+    _ctors_end = .;
+    *(.progmem*)
+    . = ALIGN(2);
+    *(.trampolines*)
+    . = ALIGN(2);
+    *(.text)
+    . = ALIGN(2);
+    *(.text*)
+    . = ALIGN(2);
+  } > ROM
+
+  .text :
+  {
+    . = ALIGN(0x10);
+  } > ROM = 0xAAAA
+
+  .= 0x800100;
+  . = ALIGN(2);
+
+  /* The ROM-to-RAM initialized data section */
+  .data :
+  {
+    _data_begin = .;
+    *(.data)
+    . = ALIGN(2);
+    KEEP (*(.data))
+    *(.data*)
+    . = ALIGN(2);
+    KEEP (*(.data*))
+    *(.rodata)  /* Do *NOT* move this! Include .rodata here if gcc is used with -fdata-sections. */
+    . = ALIGN(2);
+    KEEP (*(.rodata))
+    *(.rodata*)
+    . = ALIGN(2);
+    KEEP (*(.rodata*))
+    _data_end = .;
+  } > RAM AT > ROM
+
+  /* The uninitialized (zero-cleared) data section */
+  .bss :
+  {
+    _bss_begin = .;
+    *(.bss)
+    . = ALIGN(2);
+    KEEP (*(.bss))
+    *(.bss*)
+    . = ALIGN(2);
+    KEEP (*(.bss*))
+    _bss_end = .;
+  } > RAM
+
+  _rom_data_begin = LOADADDR(.data);
+}
diff --git a/compile/original/ld.script.avr2 b/compile/original/ld.script.avr2
new file mode 100644
index 0000000..848f647
--- /dev/null
+++ b/compile/original/ld.script.avr2
@@ -0,0 +1,149 @@
+/* Linker script for ATMEL(R) AVR(R) ATmega328P. */
+
+OUTPUT_FORMAT("elf32-avr","elf32-avr","elf32-avr")
+OUTPUT_ARCH(avr:5)
+
+/* The beginning and end of the program ROM area. */
+/* Leave 4 bytes for the 32-bit checksum plus 0x10 extra bytes free. */
+_rom_begin = 0x00000000;
+_rom_end   = 0x00007FEC;
+
+/* The beginning and end (i.e., top) of the stack */
+/* Set up a stack with a size of (1/2)K */
+_stack_begin = 0x800500;
+_stack_end   = 0x8008FF;  /* RAFA, en atmega328 el fin de la RAM */
+
+/* The end of the 2K RAM stack */
+__initial_stack_pointer = 0x8008FF;
+
+MEMORY
+{
+  ROM(rx)   : ORIGIN = 0, LENGTH = 32K
+  RAM(rw!x) : ORIGIN = 0x800100, LENGTH = 2K
+}
+
+SECTIONS
+{
+  . = 0x0;
+  . = ALIGN(2);
+
+  .text :
+  {
+    /* RAFA _*/
+    text = ABSOLUTE(.);         /* text: beginning of text segment      */
+
+    *(.vectors)
+    KEEP(*(.vectors))
+
+    /*Init sections were here*/
+    /* From this point on, we don't bother about wether the insns are
+       below or above the 16 bits boundary.  */
+    *(.init0)  /* Start here after reset.  */
+    KEEP (*(.init0))
+    *(.init1)
+    KEEP (*(.init1))
+    *(.init2)  /* Clear __zero_reg__, set up stack pointer.  */
+    KEEP (*(.init2))
+    *(.init3)
+    KEEP (*(.init3))
+    *(.init4)  /* Initialize data and BSS.  */
+    KEEP (*(.init4))
+    *(.init5)
+    KEEP (*(.init5))
+    *(.init6)  /* C++ constructors.  */
+    KEEP (*(.init6))
+    *(.init7)
+    KEEP (*(.init7))
+    *(.init8)
+    KEEP (*(.init8))
+    *(.init9)  /* Call main().  */
+    KEEP (*(.init9))
+
+    *(.def_isr)
+    KEEP(*(.def_isr))
+
+
+
+	__muluhisi3 = .;
+	start = .;
+	__do_copy_data = .;
+	__do_clear_bss = .;
+	_/* _data_end = .; */
+	__data_load_start = .;
+	__bss_end = .;
+	__bss_start = .;
+	__data_start = .;
+
+    /* FIN DE RAFA */
+    _ctors_begin = .;
+    *(.ctors)
+    . = ALIGN(2);
+    KEEP (*(SORT(.ctors)))
+    _ctors_end = .;
+    *(.progmem*)
+    . = ALIGN(2);
+    *(.trampolines*)
+    . = ALIGN(2);
+    *(.text)
+    . = ALIGN(2);
+    *(.text*)
+    . = ALIGN(2);
+    etext = ABSOLUTE(.) ;       /* etext: end of text                   */
+
+  } > ROM
+
+  .text :
+  {
+    . = ALIGN(0x10);
+  } > ROM = 0xAAAA
+
+  .= 0x800100;
+  . = ALIGN(2);
+
+  /* The ROM-to-RAM initialized data section */
+  .data :
+  {
+   data = ABSOLUTE(.);         /* data: beginning of data segment      */
+
+    _data_begin = .;
+    *(.data)
+    . = ALIGN(2);
+    KEEP (*(.data))
+    *(.data*)
+    . = ALIGN(2);
+    KEEP (*(.data*))
+    *(.rodata)  /* Do *NOT* move this! Include .rodata here if gcc is used with -fdata-sections. */
+    . = ALIGN(2);
+    KEEP (*(.rodata))
+    *(.rodata*)
+    . = ALIGN(2);
+    KEEP (*(.rodata*))
+    _data_end = .;
+    __data_end = .;
+
+   edata = ABSOLUTE(.) ;       /* edata: end of data                   */   
+  } > RAM AT > ROM
+
+  /* The uninitialized (zero-cleared) data section */
+  .bss :
+  {
+   bss = ABSOLUTE(.);          /* bss: beginning of bss segment        */
+
+    _bss_begin = .;
+    *(.bss)
+    . = ALIGN(2);
+    KEEP (*(.bss))
+    *(.bss*)
+    . = ALIGN(2);
+    KEEP (*(.bss*))
+    _bss_end = .;
+
+ ebss = ABSOLUTE(.) ;        /* ebss: end of bss                     */
+
+   end = ABSOLUTE(.);          /* end: end of image                    */
+    _end = ABSOLUTE(.);         /* _end: end of image                   */
+
+  } > RAM
+
+  _rom_data_begin = LOADADDR(.data);
+}
diff --git a/compile/original/ld.script.stm32 b/compile/original/ld.script.stm32
new file mode 100644
index 0000000..b968a92
--- /dev/null
+++ b/compile/original/ld.script.stm32
@@ -0,0 +1,55 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+/* OUTPUT_ARCH(arm) */
+ENTRY(start)
+
+physbase = 0x08000000;
+
+MEMORY 
+{
+	/* FLASH (xr) : ORIGIN = 0x08000000, LENGTH = 512K */
+	FLASH (xr) : ORIGIN = 0x8000000, LENGTH = 128K
+	/* SRAM (xrw) : ORIGIN = 0x20000000, LENGTH = 64K */
+	SRAM (xrw) : ORIGIN = 0x20000000, LENGTH = 16K
+}
+
+SECTIONS
+{
+  . = 0x0;                 /* Image starts here                    */
+  .text : ALIGN(4) {
+    text = ABSOLUTE(.);         /* text: beginning of text segment      */
+    *(.text .text.*)            /* asm text, then C text                */
+    *(.rodata .rodata.*)        /* asm and C read-only data             */
+    etext = ABSOLUTE(.) ;       /* etext: end of text                   */
+  }
+  . = 0x20000000;
+  .data : AT(etext)
+  {
+    data = ABSOLUTE(.);         /* data: beginning of data segment      */
+    *(.data .data.*)                                                    
+    edata = ABSOLUTE(.) ;       /* edata: end of data                   */                                                    
+  }                                                                     
+  .bss ALIGN(4) :                                                                
+  {                                                                     
+    bss = ABSOLUTE(.);          /* bss: beginning of bss segment        */
+    *(.bss .bss.*)
+    *(COMMON)                   /* extra sections that are common       */
+    ebss = ABSOLUTE(.) ;        /* ebss: end of bss                     */
+    . = ALIGN(8); */
+    end = ABSOLUTE(.);          /* end: end of image                    */
+    _end = ABSOLUTE(.);         /* _end: end of image                   */
+    . = ALIGN(8);
+  }
+}
diff --git a/compile/version b/compile/version
new file mode 100644
index 0000000..fdb67c1
--- /dev/null
+++ b/compile/version
@@ -0,0 +1 @@
+Xinu for ATMEGA328P -- version #280  (lechnerm)  dom may 17 23:40:51 -03 2020
diff --git a/compile/xinu.hex b/compile/xinu.hex
new file mode 100644
index 0000000..764ba9c
--- /dev/null
+++ b/compile/xinu.hex
@@ -0,0 +1,1108 @@
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diff --git a/compile/xinu.map b/compile/xinu.map
new file mode 100644
index 0000000..866ee47
--- /dev/null
+++ b/compile/xinu.map
@@ -0,0 +1,1332 @@
+Archive member included to satisfy reference by file (symbol)
+
+/usr/lib/gcc/avr/5.4.0/avr5/libgcc.a(_divmodsi4.o)
+                              binaries/doprnt.o (__divmodsi4)
+/usr/lib/gcc/avr/5.4.0/avr5/libgcc.a(_negsi2.o)
+                              /usr/lib/gcc/avr/5.4.0/avr5/libgcc.a(_divmodsi4.o) (__negsi2)
+/usr/lib/gcc/avr/5.4.0/avr5/libgcc.a(_copy_data.o)
+                              binaries/create.o (__do_copy_data)
+/usr/lib/gcc/avr/5.4.0/avr5/libgcc.a(_clear_bss.o)
+                              binaries/bufinit.o (__do_clear_bss)
+/usr/lib/gcc/avr/5.4.0/avr5/libgcc.a(_muluhisi3.o)
+                              binaries/doscan.o (__muluhisi3)
+/usr/lib/gcc/avr/5.4.0/avr5/libgcc.a(_udivmodsi4.o)
+                              /usr/lib/gcc/avr/5.4.0/avr5/libgcc.a(_divmodsi4.o) (__udivmodsi4)
+/usr/lib/gcc/avr/5.4.0/avr5/libgcc.a(_umulhisi3.o)
+                              /usr/lib/gcc/avr/5.4.0/avr5/libgcc.a(_muluhisi3.o) (__umulhisi3)
+/usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(atoi.o)
+                              binaries/initialize.o (atoi)
+/usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(memcpy.o)
+                              binaries/addargs.o (memcpy)
+/usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(memset.o)
+                              binaries/evec.o (memset)
+/usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(strncmp.o)
+                              binaries/create.o (strncmp)
+/usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(strncpy.o)
+                              binaries/create.o (strncpy)
+/usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(mul10.o)
+                              /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(atoi.o) (__mulhi_const_10)
+/usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(fprintf.o)
+                              binaries/debug.o (fprintf)
+/usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(vfprintf_std.o)
+                              /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(fprintf.o) (vfprintf)
+/usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(strnlen_P.o)
+                              /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(vfprintf_std.o) (strnlen_P)
+/usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(strnlen.o)
+                              /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(vfprintf_std.o) (strnlen)
+/usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(fputc.o)
+                              /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(vfprintf_std.o) (fputc)
+/usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(ultoa_invert.o)
+                              /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(vfprintf_std.o) (__ultoa_invert)
+/usr/lib/gcc/avr/5.4.0/avr5/libgcc.a(_prologue.o)
+                              /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(fprintf.o) (__prologue_saves__)
+/usr/lib/gcc/avr/5.4.0/avr5/libgcc.a(_epilogue.o)
+                              /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a(fprintf.o) (__epilogue_restores__)
+
+Se asignan símbolos comunes
+Símbolo común       tamaño            fichero
+
+readylist           0x1               binaries/ready.o
+sleepq              0x1               binaries/clkinit.o
+intc_vector         0xb8              binaries/evec.o
+nnames              0x2               binaries/naminit.o
+minheap             0x2               binaries/meminit.o
+marks               0x28              binaries/mark.o
+currpid             0x1               binaries/initialize.o
+porttab             0x24              binaries/ptinit.o
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+nametab             0x33              binaries/naminit.o
+ptfree              0x2               binaries/ptinit.o
+
+Configuración de la Memoria
+
+Nombre           Origen             Longitud           Atributos
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+eeprom           0x0000000000810000 0x0000000000010000 rw !x
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+user_signatures  0x0000000000850000 0x0000000000000400 rw !x
+*default*        0x0000000000000000 0xffffffffffffffff
+
+Guión del enlazador y mapa de memoria
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+La dirección de la sección .data se estableció a 0x800100
+LOAD /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/crtatmega328p.o
+LOAD binaries/start.o
+LOAD binaries/ascdate.o
+LOAD binaries/blink_avr.o
+LOAD binaries/bufinit.o
+LOAD binaries/chprio.o
+LOAD binaries/clkhandler.o
+LOAD binaries/clkinit.o
+LOAD binaries/close.o
+LOAD binaries/conf.o
+LOAD binaries/control.o
+LOAD binaries/create.o
+LOAD binaries/debug.o
+LOAD binaries/evec.o
+LOAD binaries/exit.o
+LOAD binaries/freebuf.o
+LOAD binaries/freemem.o
+LOAD binaries/getbuf.o
+LOAD binaries/getc.o
+LOAD binaries/getdev.o
+LOAD binaries/getitem.o
+LOAD binaries/getmem.o
+LOAD binaries/getpid.o
+LOAD binaries/getprio.o
+LOAD binaries/getstk.o
+LOAD binaries/getticks.o
+LOAD binaries/gettime.o
+LOAD binaries/init.o
+LOAD binaries/initialize.o
+LOAD binaries/insert.o
+LOAD binaries/insertd.o
+LOAD binaries/ioerr.o
+LOAD binaries/ionull.o
+LOAD binaries/kill.o
+LOAD binaries/kprintf.o
+LOAD binaries/main.o
+LOAD binaries/mark.o
+LOAD binaries/meminit.o
+LOAD binaries/mkbufpool.o
+LOAD binaries/newqueue.o
+LOAD binaries/open.o
+LOAD binaries/panic.o
+LOAD binaries/platinit.o
+LOAD binaries/ptclear.o
+LOAD binaries/ptcount.o
+LOAD binaries/ptcreate.o
+LOAD binaries/ptdelete.o
+LOAD binaries/ptinit.o
+LOAD binaries/ptrecv.o
+LOAD binaries/ptreset.o
+LOAD binaries/ptsend.o
+LOAD binaries/putc.o
+LOAD binaries/queue.o
+LOAD binaries/read.o
+LOAD binaries/ready.o
+LOAD binaries/receive.o
+LOAD binaries/recvclr.o
+LOAD binaries/recvtime.o
+LOAD binaries/resched.o
+LOAD binaries/resume.o
+LOAD binaries/seek.o
+LOAD binaries/semcount.o
+LOAD binaries/semcreate.o
+LOAD binaries/semdelete.o
+LOAD binaries/semreset.o
+LOAD binaries/send.o
+LOAD binaries/serial_avr.o
+LOAD binaries/signal.o
+LOAD binaries/signaln.o
+LOAD binaries/sleep.o
+LOAD binaries/suspend.o
+LOAD binaries/syscall.o
+LOAD binaries/unsleep.o
+LOAD binaries/userret.o
+LOAD binaries/wait.o
+LOAD binaries/wakeup.o
+LOAD binaries/write.o
+LOAD binaries/xdone.o
+LOAD binaries/yield.o
+LOAD binaries/ctype_.o
+LOAD binaries/doprnt.o
+LOAD binaries/doscan.o
+LOAD binaries/messages.o
+LOAD binaries/userland.o
+LOAD binaries/mount.o
+LOAD binaries/naminit.o
+LOAD binaries/nammap.o
+LOAD binaries/namopen.o
+LOAD binaries/addargs.o
+LOAD binaries/lexan.o
+LOAD binaries/shell.o
+LOAD binaries/intr.o
+START GROUP
+LOAD /usr/lib/gcc/avr/5.4.0/avr5/libgcc.a
+LOAD /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libm.a
+LOAD /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libc.a
+LOAD /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/libatmega328p.a
+END GROUP
+                0x0000000000020000                __TEXT_REGION_LENGTH__ = DEFINED (__TEXT_REGION_LENGTH__)?__TEXT_REGION_LENGTH__:0x20000
+                0x000000000000ffa0                __DATA_REGION_LENGTH__ = DEFINED (__DATA_REGION_LENGTH__)?__DATA_REGION_LENGTH__:0xffa0
+                0x0000000000010000                __EEPROM_REGION_LENGTH__ = DEFINED (__EEPROM_REGION_LENGTH__)?__EEPROM_REGION_LENGTH__:0x10000
+                [0x0000000000000003]                __FUSE_REGION_LENGTH__ = DEFINED (__FUSE_REGION_LENGTH__)?__FUSE_REGION_LENGTH__:0x400
+                0x0000000000000400                __LOCK_REGION_LENGTH__ = DEFINED (__LOCK_REGION_LENGTH__)?__LOCK_REGION_LENGTH__:0x400
+                0x0000000000000400                __SIGNATURE_REGION_LENGTH__ = DEFINED (__SIGNATURE_REGION_LENGTH__)?__SIGNATURE_REGION_LENGTH__:0x400
+                0x0000000000000400                __USER_SIGNATURE_REGION_LENGTH__ = DEFINED (__USER_SIGNATURE_REGION_LENGTH__)?__USER_SIGNATURE_REGION_LENGTH__:0x400
+
+.hash
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+ *(.rela.gnu.linkonce.r*)
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+                0x0000000000000000                __vectors
+                0x0000000000000000                __vector_default
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+ *(.vectors)
+ *(.progmem.gcc*)
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+                0x00000000000000d0                __trampolines_start = .
+ *(.trampolines)
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+ *(.trampolines*)
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+ *libprintf_flt.a:*(.progmem.data)
+ *libc.a:*(.progmem.data)
+ *(.progmem*)
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+                0x000000000000029e                __ctors_end = .
+                0x000000000000029e                __dtors_start = .
+ *(.dtors)
+                0x000000000000029e                __dtors_end = .
+ SORT(*)(.ctors)
+ SORT(*)(.dtors)
+ *(.init0)
+ .init0         0x000000000000029e        0x0 /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/crtatmega328p.o
+                0x000000000000029e                __init
+ *(.init0)
+ *(.init1)
+ *(.init1)
+ *(.init2)
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+ *(.init2)
+ *(.init3)
+ *(.init3)
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+                0x00000000000002aa                __do_copy_data
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+                0x00000000000002c0                __do_clear_bss
+ *(.init4)
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+ *(.init8)
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+ *(.init9)
+ *(.text)
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+                0x00000000000002dc                __vector_22
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+                0x00000000000002e4                my_delay
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+.debug_abbrev   0x0000000000000000      0x5a2
+ *(.debug_abbrev)
+ .debug_abbrev  0x0000000000000000      0x5a2 /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/crtatmega328p.o
+
+.debug_line     0x0000000000000000       0x1a
+ *(.debug_line .debug_line.* .debug_line_end)
+ .debug_line    0x0000000000000000       0x1a /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/crtatmega328p.o
+
+.debug_frame
+ *(.debug_frame)
+
+.debug_str      0x0000000000000000      0x208
+ *(.debug_str)
+ .debug_str     0x0000000000000000      0x208 /usr/lib/gcc/avr/5.4.0/../../../avr/lib/avr5/crtatmega328p.o
+
+.debug_loc
+ *(.debug_loc)
+
+.debug_macinfo
+ *(.debug_macinfo)
+
+.debug_weaknames
+ *(.debug_weaknames)
+
+.debug_funcnames
+ *(.debug_funcnames)
+
+.debug_typenames
+ *(.debug_typenames)
+
+.debug_varnames
+ *(.debug_varnames)
+
+.debug_pubtypes
+ *(.debug_pubtypes)
+
+.debug_ranges
+ *(.debug_ranges)
+
+.debug_macro
+ *(.debug_macro)
+OUTPUT(../compile/xinu.elf elf32-avr)
+LOAD linker stubs
diff --git a/config/Configuration b/config/Configuration
new file mode 100644
index 0000000..36d3759
--- /dev/null
+++ b/config/Configuration
@@ -0,0 +1,119 @@
+/************************************************************************/
+/*									*/
+/* Configuration - Xinu device configuration specification file		*/
+/*									*/
+/* This file becomes input to the config program, which generates	*/
+/* 		conf.h  and  conf.c					*/
+/*									*/
+/* Entries for a device specify the functions that handle each of the	*/
+/* high-level I/O operations as follows:				*/
+/*									*/
+/*	-i    init	-o    open	-c    close			*/
+/*	-r    read	-w    write	-s    seek			*/
+/*	-g    getc	-p    putc	-n    control			*/
+/*	-intr int_hndlr	-csr  csr	-irq  irq			*/
+/*									*/
+/************************************************************************/
+
+/* Type Declarations for both real- and pseudo- device types */
+
+/* type of a null device */
+null:
+	on nothing
+		-i ionull	-o ionull	-c ionull
+		-r ionull	-g ionull	-p ionull
+		-w ionull	-s ioerr
+
+/* type of a gpio device */
+/* RAFA
+gpio:
+	on standard_gpio
+		-i gpioinit      -o ionull       -c ionull
+		-r gpioread      -g ionull       -p ionull
+		-w gpiowrite     -s ioerr        -n gpiocontrol
+		-intr gpiohandler
+FIN DE RAFA */
+
+/* type of a tty device */
+tty:
+	/* RAFA 
+	on uart
+		-i ttyinit      -o ionull       -c ionull
+		-r ttyread      -g ttygetc      -p ttyputc
+		-w ttywrite     -s ioerr        -n ttycontrol
+		-intr ttyhandler
+	FIN DE RAFA */
+	on uart
+		-i ionull      -o ionull       -c ionull
+		-r ionull      -g ionull      -p ionull
+		-w ionull     -s ioerr        -n ionull
+		-intr ionull
+
+/* type of ram disk */
+/* RAFA
+ram:
+	on mem
+		-i raminit	-o ramopen	-c ramclose
+		-r ramread	-g ioerr	-p ioerr
+		-w ramwrite	-s ioerr	-n ioerr
+		-intr ionull
+FIN DE RAFA */
+
+/* type of namespace device */
+nam:
+	on top
+		-i naminit 	-o namopen 	-c ioerr
+		-r ioerr 	-g ioerr 	-p ioerr
+		-w ioerr 	-s ioerr 	-n ioerr
+		-intr ioerr
+
+/* RAFA
+spi:
+	on standard_spi
+		-i spiinit 	-o ioerr 	-c ioerr
+		-r ioerr 	-g ioerr 	-p spiputc
+		-w ioerr 	-s ioerr 	-n ioerr
+		-intr ioerr
+FIN DE RAFA */
+	
+%%
+
+/* Actual device declarations that each give the name of a device that	*/
+/*   will be present in the system					*/
+
+   /* Define the console device to be a tty and specify CSR*/
+   CONSOLE is tty  on uart  csr 0x40013800 -irq 53
+   
+   /* Define the console device to be a tty and specify CSR*/
+/* RAFA   GPIO0 is gpio  on standard_gpio  csr 0x40010800 -irq 99 */
+   /* Define the console device to be a tty and specify CSR*/
+/* RAFA   GPIO1 is gpio  on standard_gpio  csr 0x40010C00 -irq 99 */
+   /* Define the console device to be a tty and specify CSR*/
+/* RAFA   GPIO2 is gpio  on standard_gpio  csr 0x40011000 -irq 99 */
+   /* Define the console device to be a tty and specify CSR*/
+/* RAFA   GPIO3 is gpio  on standard_gpio  csr 0x40011400 -irq 99 */
+
+   /* Define a null device */
+   NULLDEV is null on nothing
+
+   /* Define a namespace device */
+   NAMESPACE is nam on top
+
+   /* Define a SPI device */
+/* RAFA   SPI1	is spi on standard_spi */
+
+   /* Define a ram disk device */
+/* RAFA   RAM0 is ram on mem */
+
+%%
+
+/* Configuration and Size Constants */
+
+#define	NPROC	     4		/* number of user processes		*/
+#define	NSEM	     4		/* number of semaphores			*/
+#define	IRQBASE	     32		/* base ivec for IRQ0			*/
+#define	IRQ_TIMER    IRQ_HW5	/* timer IRQ is wired to hardware 5	*/
+#define	IRQ_ATH_MISC IRQ_HW4	/* Misc. IRQ is wired to hardware 4	*/
+#define CLKFREQ      200000000	/* 200 MHz clock			*/
+
+// #define	LF_DISK_DEV	RAM0
diff --git a/config/Configuration.orig b/config/Configuration.orig
new file mode 100644
index 0000000..4096645
--- /dev/null
+++ b/config/Configuration.orig
@@ -0,0 +1,106 @@
+/************************************************************************/
+/*									*/
+/* Configuration - Xinu device configuration specification file		*/
+/*									*/
+/* This file becomes input to the config program, which generates	*/
+/* 		conf.h  and  conf.c					*/
+/*									*/
+/* Entries for a device specify the functions that handle each of the	*/
+/* high-level I/O operations as follows:				*/
+/*									*/
+/*	-i    init	-o    open	-c    close			*/
+/*	-r    read	-w    write	-s    seek			*/
+/*	-g    getc	-p    putc	-n    control			*/
+/*	-intr int_hndlr	-csr  csr	-irq  irq			*/
+/*									*/
+/************************************************************************/
+
+/* Type Declarations for both real- and pseudo- device types */
+
+/* type of a null device */
+null:
+	on nothing
+		-i ionull	-o ionull	-c ionull
+		-r ionull	-g ionull	-p ionull
+		-w ionull	-s ioerr
+
+/* type of a gpio device */
+gpio:
+	on standard_gpio
+		-i gpioinit      -o ionull       -c ionull
+		-r gpioread      -g ionull       -p ionull
+		-w gpiowrite     -s ioerr        -n gpiocontrol
+		-intr gpiohandler
+
+/* type of a tty device */
+tty:
+	on uart
+		-i ttyinit      -o ionull       -c ionull
+		-r ttyread      -g ttygetc      -p ttyputc
+		-w ttywrite     -s ioerr        -n ttycontrol
+		-intr ttyhandler
+
+/* type of ram disk */
+ram:
+	on mem
+		-i raminit	-o ramopen	-c ramclose
+		-r ramread	-g ioerr	-p ioerr
+		-w ramwrite	-s ioerr	-n ioerr
+		-intr ionull
+
+/* type of namespace device */
+nam:
+	on top
+		-i naminit 	-o namopen 	-c ioerr
+		-r ioerr 	-g ioerr 	-p ioerr
+		-w ioerr 	-s ioerr 	-n ioerr
+		-intr ioerr
+
+spi:
+	on standard_spi
+		-i spiinit 	-o ioerr 	-c ioerr
+		-r ioerr 	-g ioerr 	-p spiputc
+		-w ioerr 	-s ioerr 	-n ioerr
+		-intr ioerr
+	
+%%
+
+/* Actual device declarations that each give the name of a device that	*/
+/*   will be present in the system					*/
+
+   /* Define the console device to be a tty and specify CSR*/
+   CONSOLE is tty  on uart  csr 0x40013800 -irq 53
+   
+   /* Define the console device to be a tty and specify CSR*/
+   GPIO0 is gpio  on standard_gpio  csr 0x40010800 -irq 99
+   /* Define the console device to be a tty and specify CSR*/
+   GPIO1 is gpio  on standard_gpio  csr 0x40010C00 -irq 99
+   /* Define the console device to be a tty and specify CSR*/
+   GPIO2 is gpio  on standard_gpio  csr 0x40011000 -irq 99
+   /* Define the console device to be a tty and specify CSR*/
+   GPIO3 is gpio  on standard_gpio  csr 0x40011400 -irq 99
+
+   /* Define a null device */
+   NULLDEV is null on nothing
+
+   /* Define a namespace device */
+   NAMESPACE is nam on top
+
+   /* Define a SPI device */
+   SPI1	is spi on standard_spi
+
+   /* Define a ram disk device */
+   RAM0 is ram on mem
+
+%%
+
+/* Configuration and Size Constants */
+
+#define	NPROC	     10		/* number of user processes		*/
+#define	NSEM	     10		/* number of semaphores			*/
+#define	IRQBASE	     32		/* base ivec for IRQ0			*/
+#define	IRQ_TIMER    IRQ_HW5	/* timer IRQ is wired to hardware 5	*/
+#define	IRQ_ATH_MISC IRQ_HW4	/* Misc. IRQ is wired to hardware 4	*/
+#define CLKFREQ      200000000	/* 200 MHz clock			*/
+
+#define	LF_DISK_DEV	RAM0
diff --git a/config/DESCRIPTION b/config/DESCRIPTION
new file mode 100644
index 0000000..4186fbb
--- /dev/null
+++ b/config/DESCRIPTION
@@ -0,0 +1,111 @@
+This is the Xinu config program that allows one to specify a set of
+device drivers.
+
+Input: the program reads specifications from an input file, usually
+
+		Configuration
+
+
+Output: the program produces two ouput files, usually
+
+		conf.h	- configuration constants and declarations
+				for device drivers and the device
+				switch table
+
+		conf.c	- initialization code for data strcutures
+				declared in conf.h
+		
+
+The input file consists of three sections, with %% used as a sparator
+between sections:
+
+----------------------------------------------------------------------------
+
+	/* Comments can appear anywhere in the input file; use	*/
+	/*	the C style of slash-star ... star-slash.	*/
+	/* The config program ignores whitespace and comments.	*/
+
+
+	device type declarations
+
+%%
+
+	device declarations
+
+%%
+
+	Other constants added to conf.h (typically, #defines)
+
+----------------------------------------------------------------------------
+
+
+**************************** Type Declarations *****************************
+
+
+The type declaration section consists of a series of entries of the form:
+
+	type_name:  on  hardware_name  [options]
+
+where
+
+	type_name	a name for the type
+	:		a required punctuation, usually appended onto the
+				type name
+	on		a keyword
+	hardware_name	any string used to allow a type name to have
+				two implementations
+	options		multiple options can be specified, and each
+				consists of a flag and the name of a
+				driver function or hardware parameter
+				(the minus sign in front of a flag
+				can be omitted):
+
+				-i	initialization_function
+				-o	open_function
+				-r	read_function
+				-w	write_function
+				-s	seek_function
+				-c	close_function
+				-g	getc_function
+				-p	putc_function
+				-n	control_function
+				-intr	interrupt_handler
+				-csr	CSR address
+				-irq	Interrupt request number
+
+Example:
+
+
+	eth:        on quark_eth
+		-i ethinit      -o ioerr        -c ioerr
+		-r ethread      -g ioerr        -p ioerr
+		-w ethwrite     -s ioerr        -n ethcontrol
+		-intr ethdispatch
+
+
+*************************** Device Declarations ****************************
+
+
+The device declaration section consists of one entry per device in the form:
+
+	device_name	is type_name on hardware_name [options]
+
+where
+
+	device_name	a name for the device (by convention, Xinu
+				uses upper-case device names)
+	is		a keyword
+	type_name	the name of a type defined above
+	on		a keyword
+	hardware_name	must match one of the hardware names used with
+				when the type was defined
+	options		the same as the options above -- any values used
+				on a device declaration override the
+				values defined for the type.  Typically,
+				a type does not have specific hardware
+				parameters, so they must be filled in.
+	
+Example:
+
+
+	ETHER is eth  on quark_eth  csr 0001770 -irq 0053
diff --git a/config/Makefile b/config/Makefile
new file mode 100644
index 0000000..68a6a47
--- /dev/null
+++ b/config/Makefile
@@ -0,0 +1,41 @@
+#
+# Make the Xinu configuration program
+#
+
+COMPILER_ROOT	=	/usr/bin/
+
+CC	= ${COMPILER_ROOT}gcc
+LEX	= ${COMPILER_ROOT}flex
+YACC	= ${COMPILER_ROOT}bison -y	# Flag enables yacc-compatible filenames
+CFLAGS	= 
+LFLAGS	= -lfl
+
+#
+# Name of the configuration program
+#
+
+CONFIG	= config
+
+all:		conf.h conf.c
+
+${CONFIG}:	lex.yy.c y.tab.c
+		$(CC) ${CFLAGS} -o $@ y.tab.c ${LFLAGS}
+
+lex.yy.c:	config.l
+		$(LEX) config.l
+
+y.tab.c:	config.y
+		$(YACC) config.y
+
+clean:
+		rm -f config lex.yy.c y.tab.c
+
+conf.h:		config Configuration
+		./config Configuration conf.c conf.h
+
+conf.c:		config Configuration
+		./config Configuration conf.c conf.h
+
+install:	conf.h conf.c
+		cp -p conf.h ../include
+		cp -p conf.c ../system
diff --git a/config/conf.c b/config/conf.c
new file mode 100644
index 0000000..6d88315
--- /dev/null
+++ b/config/conf.c
@@ -0,0 +1,44 @@
+/* conf.c (GENERATED FILE; DO NOT EDIT) */
+
+#include <xinu.h>
+
+
+extern	devcall	ioerr(void);
+extern	devcall	ionull(void);
+
+/* Device independent I/O switch */
+
+typedef unsigned int size_t;
+#include <avr/pgmspace.h>
+const struct	dentry	devtab[] PROGMEM =
+{
+/**
+ * Format of entries is:
+ * dev-number, minor-number, dev-name,
+ * init, open, close,
+ * read, write, seek,
+ * getc, putc, control,
+ * dev-csr-address, intr-handler, irq
+ */
+
+/* CONSOLE is tty */
+	{ 0, 0, "CONSOLE",
+	  (void *)ionull, (void *)ionull, (void *)ionull,
+	  (void *)ionull, (void *)ionull, (void *)ioerr,
+	  (void *)ionull, (void *)ionull, (void *)ionull,
+	  (void *)0x40013800, (void *)ionull, 53 },
+
+/* NULLDEV is null */
+	{ 1, 0, "NULLDEV",
+	  (void *)ionull, (void *)ionull, (void *)ionull,
+	  (void *)ionull, (void *)ionull, (void *)ioerr,
+	  (void *)ionull, (void *)ionull, (void *)ioerr,
+	  (void *)0x0, (void *)ioerr, 0 },
+
+/* NAMESPACE is nam */
+	{ 2, 0, "NAMESPACE",
+	  (void *)naminit, (void *)namopen, (void *)ioerr,
+	  (void *)ioerr, (void *)ioerr, (void *)ioerr,
+	  (void *)ioerr, (void *)ioerr, (void *)ioerr,
+	  (void *)0x0, (void *)ioerr, 0 }
+};
diff --git a/config/conf.h b/config/conf.h
new file mode 100644
index 0000000..0609764
--- /dev/null
+++ b/config/conf.h
@@ -0,0 +1,50 @@
+/* conf.h (GENERATED FILE; DO NOT EDIT) */
+
+/* Device switch table declarations */
+
+/* Device table entry */
+struct	dentry	{
+	int32   dvnum;
+	int32   dvminor;
+	char    dvname[16];
+	devcall (*dvinit) (struct dentry *);
+	devcall (*dvopen) (struct dentry *, char *, char *);
+	devcall (*dvclose)(struct dentry *);
+	devcall (*dvread) (struct dentry *, void *, uint32);
+	devcall (*dvwrite)(struct dentry *, void *, uint32);
+	devcall (*dvseek) (struct dentry *, int32);
+	devcall (*dvgetc) (struct dentry *);
+	devcall (*dvputc) (struct dentry *, char);
+	devcall (*dvcntl) (struct dentry *, int32, int32, int32);
+	void    *dvcsr;
+	void    (*dvintr)(void);
+	byte    dvirq;
+};
+
+extern	const struct	dentry	devtab[]; /* one entry per device */
+
+/* Device name definitions */
+
+#define CONSOLE              0	/* type tty      */
+#define NULLDEV              1	/* type null     */
+#define NAMESPACE            2	/* type nam      */
+
+/* Control block sizes */
+
+#define	Nnull	1
+#define	Ntty	1
+#define	Nnam	1
+
+#define NDEVS 3
+
+
+/* Configuration and Size Constants */
+
+#define	NPROC	     4		/* number of user processes		*/
+#define	NSEM	     4		/* number of semaphores			*/
+#define	IRQBASE	     32		/* base ivec for IRQ0			*/
+#define	IRQ_TIMER    IRQ_HW5	/* timer IRQ is wired to hardware 5	*/
+#define	IRQ_ATH_MISC IRQ_HW4	/* Misc. IRQ is wired to hardware 4	*/
+#define CLKFREQ      200000000	/* 200 MHz clock			*/
+
+// #define	LF_DISK_DEV	RAM0
diff --git a/config/config.l b/config/config.l
new file mode 100644
index 0000000..ba2f687
--- /dev/null
+++ b/config/config.l
@@ -0,0 +1,40 @@
+%{
+extern int linectr;
+extern int brkcount;
+int skipping;
+%}
+OCT 0[0-7]*
+DEC [1-9][0-9]*
+HEX 0x[0-9a-fA-F]+
+ID [a-z_A-Z][a-z_A-Z0-9]*
+%%
+"/*"      { skipping = 1;                     }
+"*/"      { skipping = 0;                     }
+"%%"      { if (! skipping)
+                if (++brkcount >= 2)
+                { return 0; /* EOF */ }
+                else
+                { return DEFBRK; }            }
+":"       { if (! skipping) return COLON;     }
+{OCT}     { if (! skipping) return INTEGER;   }
+{DEC}     { if (! skipping) return INTEGER;   }
+{HEX}     { if (! skipping) return INTEGER;   }
+is        { if (! skipping) return IS;        }
+on        { if (! skipping) return ON;        }
+"="       ;
+-?intr    { if (! skipping) return INTR;      }
+-?csr     { if (! skipping) return CSR;       }
+-?irq     { if (! skipping) return IRQ;       }
+-?i       { if (! skipping) return INIT;      }
+-?o       { if (! skipping) return OPEN;      }
+-?c       { if (! skipping) return CLOSE;     }
+-?r       { if (! skipping) return READ;      }
+-?g       { if (! skipping) return GETC;      }
+-?p       { if (! skipping) return PUTC;      }
+-?w       { if (! skipping) return WRITE;     }
+-?s       { if (! skipping) return SEEK;      }
+-?n       { if (! skipping) return CONTROL;   }
+[ \t]+    ;
+"\n"      { linectr++;                        }
+{ID}      { if (! skipping) return IDENT;     }
+.         { if (! skipping) return yytext[0]; }
diff --git a/config/config.y b/config/config.y
new file mode 100644
index 0000000..1fd4c85
--- /dev/null
+++ b/config/config.y
@@ -0,0 +1,754 @@
+/* config.y - yacc input file for the Xinu config program */
+
+/************************************************************************/
+/*									*/
+/*	This file contains the yacc grammar and	semantic functions	*/
+/*    that read a Xinu Configuration file and generate output files	*/
+/*    conf.h and conf.c that are then compiled along with the rest of	*/
+/*    Xinu.								*/
+/*									*/
+/************************************************************************/
+
+%token	DEFBRK IFBRK COLON OCTAL INTEGER IDENT CSR IRQ INTR INIT OPEN
+	CLOSE READ WRITE SEEK CONTROL IS ON GETC PUTC
+%{
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+extern	char	*yytext;
+/*
+   Work-around for the type conflict that results from unmatched versions
+   of flex and bison (lex and yacc).  The idea is to force the new flex
+   style so the output file (lex.yy.c) treats yyleng as an int (as was
+   done by oldest lex versions) instead of a size_t.  We override the
+   new flex typedef of yy_size_t.
+*/
+#ifndef YY_TYPEDEF_YY_SIZE_T
+#define YY_TYPEDEF_YY_SIZE_T
+typedef int yy_size_t;
+#endif
+/* End work-around */
+extern	int	yyleng;
+
+
+/********************************************************************************/
+/*										*/
+/*			Start of Definitions					*/
+/*										*/
+/********************************************************************************/
+
+#define	NIL	(struct dev_ent *)0x00
+
+#define	CONFC	 "conf.c"		/* Name of .c output			*/
+#define CONFH	 "conf.h"		/* Name of .h output			*/
+#define	CONFHREF "<conf.h>"		/* How conf.h referenced		*/
+#define	INFILE	 "Configuration"	/* Name of input file			*/
+// RAFA #define	MAXNAME  16			/* Max length of names			*/
+#define	MAXNAME  16			/* Max length of names			*/
+
+// RAFA #define	NDEVS		250		/* Max devices				*/
+// RAFA #define	NTYPES		250		/* Max device types			*/
+#define	NDEVS		5		/* Max devices				*/
+#define	NTYPES		5		/* Max device types			*/
+
+int	linectr = 1;
+
+FILE	*confc;
+FILE	*confh;
+
+int	brkcount = 0;			/* Count of %% separators till now in	*/
+					/*  the input file			*/
+char	*doing = "device type declarations";
+
+struct	dev_ent	{			/* Entry for a device or device type	*/
+	char	name[MAXNAME];		/* device name (unused in a type)	*/
+	char	tname[MAXNAME];		/* Type name				*/
+	char	ison[MAXNAME];		/* Name is "on" XXX			*/
+	int	tindex;			/* Index in dtypes (unused in a type)	*/
+	int	csr;			/* Control Status Register addr		*/
+	int	irq;			/* interrupt request			*/
+	char	intr[MAXNAME];		/* interrupt function name		*/
+	char	init[MAXNAME];		/* init function name			*/
+	char	open[MAXNAME];		/* open function name			*/
+	char	close[MAXNAME];		/* close function name			*/
+	char	read[MAXNAME];		/* read function name			*/
+	char	write[MAXNAME];		/* write function name			*/
+	char	control[MAXNAME];	/* control function name		*/
+	char	seek[MAXNAME];		/* seek function name			*/
+	char	getc[MAXNAME];		/* getc function name			*/
+	char	putc[MAXNAME];		/* putc function name			*/
+	int	minor;			/* In a device, the minor device	*/
+					/*  assigned to the device 0,1,...	*/
+					/*  in a type, the next minor number	*/
+					/*  to assign				*/
+};
+struct	dev_ent		dtypes[NTYPES];/* Table of all device types		*/
+int	ntypes	= 0;			/* Number of device types found		*/
+
+struct	dev_ent		devs[NDEVS];	/* Table of all devices			*/
+int	ndevs = 0;			/* Number of devices found		*/
+
+char *devstab[] = {
+	"/* Device table entry */",
+	"struct\tdentry\t{",
+	"\tint32   dvnum;",
+	"\tint32   dvminor;",
+// RAFA 	"\tchar    *dvname;",
+	"\tchar    dvname[16];",
+	"\tdevcall (*dvinit) (struct dentry *);",
+	"\tdevcall (*dvopen) (struct dentry *, char *, char *);",
+	"\tdevcall (*dvclose)(struct dentry *);",
+	"\tdevcall (*dvread) (struct dentry *, void *, uint32);",
+	"\tdevcall (*dvwrite)(struct dentry *, void *, uint32);",
+	"\tdevcall (*dvseek) (struct dentry *, int32);",
+	"\tdevcall (*dvgetc) (struct dentry *);",
+	"\tdevcall (*dvputc) (struct dentry *, char);",
+	"\tdevcall (*dvcntl) (struct dentry *, int32, int32, int32);",
+	"\tvoid    *dvcsr;",
+	"\tvoid    (*dvintr)(void);",
+	"\tbyte    dvirq;",
+	"};\n",
+	"extern	const struct	dentry	devtab[]; /* one entry per device */",
+	NULL
+};
+
+char	saveattrid[MAXNAME];		/* Holds the IDENT from an attribute	*/
+
+/********************************************************************************/
+/*										*/
+/*			       Function prototypes				*/
+/*										*/
+/********************************************************************************/
+
+void	addattr(int, int);
+int	addton(char *);
+int	config_atoi(char *, int);
+void	devisid(char *);
+void	devonid(char *);
+void	getattrid(char *);
+void	newdev(char *);
+int	newtype(char *);
+void	yyerror(char *);
+
+
+%}
+
+%%
+/************************************************************************/
+/*									*/
+/*		Grammar rules for the entire Configuration		*/
+/*									*/
+/************************************************************************/
+
+configuration:	devtypes DEFBRK devices
+;
+
+/************************************************************************/
+/*									*/
+/*		    Grammar rules for device types			*/
+/*									*/
+/************************************************************************/
+
+devtypes:	/* nothing */ { doing = "device definitions"; }
+		| devtypes devtype
+;
+
+devtype:	tname COLON dev_tlist
+;
+
+tname:		IDENT { $$ = newtype(yytext); }
+;
+
+dev_tlist:	theader attr_list
+		| dev_tlist theader attr_list
+;
+
+theader:	ON tonid { $$ = $2; }
+;
+
+tonid:		IDENT { $$ = addton(yytext); }
+;
+
+attr_list:	/* nothing */
+		| attr_list attr
+;
+
+attr:		  CSR number		{ addattr(CSR,    $2);	}
+		| IRQ number		{ addattr(IRQ,    $2);	}
+		| INTR id		{ addattr(INTR,    0);	}
+		| OPEN id		{ addattr(OPEN,    0);	}
+		| CLOSE id		{ addattr(CLOSE,   0);	}
+		| INIT id		{ addattr(INIT,    0);	}
+		| GETC id		{ addattr(GETC,    0);	}
+		| PUTC id		{ addattr(PUTC,    0);	}
+		| READ id		{ addattr(READ,    0);	}
+		| WRITE id		{ addattr(WRITE,   0);	}
+		| SEEK id		{ addattr(SEEK,    0);	}
+		| CONTROL id		{ addattr(CONTROL, 0);	}
+;
+
+id:		IDENT { $$ = 0; getattrid(yytext); }
+;
+
+number:		INTEGER { $$ = config_atoi(yytext, yyleng); }
+;
+
+
+/************************************************************************/
+/*									*/
+/*		Grammar rules for device definitions			*/
+/*									*/
+/************************************************************************/
+
+devices:	/* nothing */ { doing = "interface types"; }
+		| devices device
+;
+
+device:		dheader attr_list
+;
+
+dheader:	dname devis devon
+;
+
+dname:		IDENT { newdev(yytext); }
+;
+
+devis:		IS devisid
+;
+
+devisid:	IDENT { devisid(yytext); }
+;
+
+devon:		ON devonid
+;
+
+devonid:	IDENT { devonid(yytext); }
+;
+
+%%
+
+#include "lex.yy.c"
+
+
+/************************************************************************/
+/*									*/
+/* main  -  main program: parse arguments, invoke the parser, and	*/
+/*		write the conf.h and conf.c files			*/
+/*									*/
+/************************************************************************/
+
+
+int main(int argc, char **argv) {
+	int n, i, j, l, fcount;
+	struct dev_ent *s;
+	int   verbose = 0;
+	char *p;
+	int  c;
+
+	if ( argc > 1 && (strncmp("-v", argv[1], 2) == 0) ) {
+		argc--;
+		argv++;
+		verbose++;
+	}
+
+	if ( argc > 4 ) {
+		fprintf(stderr, "use: config [-v] [input_file] [conf.c] [conf.h]\n");
+		exit(1);
+	}
+
+	if (verbose) { printf("Opening input file...\n"); }
+
+	if (argc >= 2) {
+		if (freopen(argv[1], "r", stdin) == NULL) {
+			fprintf(stderr, "Can't open %s\n", argv[1]);
+			exit(1);
+		}
+	}
+	else {	/* try to open Configuration file */
+		if (freopen(INFILE, "r", stdin) == NULL) {
+			fprintf(stderr, "Can't open %s\n", INFILE);
+			exit(1);
+		}
+	}
+
+	/****************************************************************/
+	/*								*/
+	/*		Parse the Configuration file			*/
+	/*								*/
+	/****************************************************************/
+
+
+	if (verbose) { printf("Parsing configuration specs...\n"); }
+
+	if ( (n = yyparse()) != 0 ) { exit(n); }
+
+	/* Open conf.h and conf.c for writing */
+
+	if (verbose) { printf("Opening output files...\n"); }
+
+	if (argc >= 3) {
+		if ( (confc = fopen(argv[2],"w") ) == NULL) {
+			fprintf(stderr, "Can't write on %s\n", argv[2]);
+			exit(1);
+		}
+	}
+	else { 	/* try to open conf.c file */
+		if ( (confc = fopen(CONFC,"w") ) == NULL) {
+			fprintf(stderr, "Can't write on %s\n", CONFC);
+			exit(1);
+		}
+	}
+
+	if (argc >= 4) {
+		if ( (confh = fopen(argv[3],"w") ) == NULL) {
+			fprintf(stderr, "Can't write on %s\n", argv[3]);
+			exit(1);
+		}
+	}
+	else { 	/* try to open conf.h file */
+		if ( (confh = fopen(CONFH,"w") ) == NULL) {
+			fprintf(stderr, "Can't write on %s\n", CONFH);
+			exit(1);
+		}
+	}
+
+	/****************************************************************/
+	/*								*/
+	/*			produce conf.h				*/
+	/*								*/
+	/****************************************************************/
+
+
+	fprintf(confh, "/* conf.h (GENERATED FILE; DO NOT EDIT) */\n\n");
+
+	if (verbose) { printf("Writing output...\n"); }
+
+	fprintf(confh, "/* Device switch table declarations */\n\n");
+
+	for (i = 0; (p = devstab[i]) != NULL; i++) {
+		fprintf(confh, "%s\n", p);
+	}
+
+	fprintf(confh, "\n");
+
+	/* write device declarations and definitions */
+
+	fprintf(confh, "/* Device name definitions */\n\n");
+	for (i = 0; i<ndevs; i++) {
+		s = &devs[i];
+		fprintf(confh, "#define %-20s%2d\t/* type %-8s */\n",
+			s->name, i, s->tname);
+	}
+	fprintf(confh, "\n");
+
+	/* write count of device types */
+
+	fprintf(confh, "/* Control block sizes */\n\n");
+	for (i = 0; i < ntypes;  i++) {
+		s = &dtypes[i];
+		if (s->minor > 0) {
+			fprintf(confh, "#define\tN%s\t%d\n",
+				s->tname, s->minor);
+		}
+	}
+
+	fprintf(confh, "\n");
+
+	if (ndevs > 0) { fprintf(confh, "#define NDEVS %d\n", ndevs); }
+
+	/* Copy definitions to output */
+
+	if (brkcount >= 4 && verbose) {
+		printf("Copying definitions to %s...\n", CONFH);
+	}
+
+	if (brkcount >= 2) {
+		while ( (c = input()) > 0) {	/* lex input function	*/
+			putc(c, confh);
+		}
+	}
+	fclose(confh);
+
+
+	/****************************************************************/
+	/*								*/
+	/*			produce conf.c				*/
+	/*								*/
+	/****************************************************************/
+
+
+	fprintf(confc, "/* conf.c (GENERATED FILE; DO NOT EDIT) */\n\n");
+	fprintf(confc, "#include <xinu.h>\n\n");
+	fprintf(confc, "\n");
+
+	fprintf(confc, "extern\tdevcall\tioerr(void);\n");
+	fprintf(confc, "extern\tdevcall\tionull(void);\n\n");
+
+	/* produce devtab (giant I/O switch table) */
+	fprintf(confc, "/* Device independent I/O switch */\n\n");
+	if (ndevs > 0)
+	{
+		// RAFA fprintf(confc, "const struct	dentry	devtab[NDEVS] =\n{\n");
+		fprintf(confc, "typedef unsigned int size_t;\n");
+		fprintf(confc, "#include <avr/pgmspace.h>\n");
+		fprintf(confc, "const struct	dentry	devtab[] PROGMEM =\n{\n");
+		// RAFA fprintf(confc, "const struct	dentry	devtab[] PROGMEM =\n{\n");
+		fprintf(confc, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n\n",
+			"/**",
+			" * Format of entries is:",
+			" * dev-number, minor-number, dev-name,",
+			" * init, open, close,",
+			" * read, write, seek,",
+			" * getc, putc, control,",
+			" * dev-csr-address, intr-handler, irq",
+			" */");
+	}
+
+	for (i=0; i<ndevs; i++) {
+		s = &devs[i];
+		fprintf(confc, "/* %s is %s */\n", s->name, s->tname);
+		fprintf(confc, "\t{ %d, %d, \"%s\",\n", i, s->minor, s->name);
+		fprintf(confc, "\t  (void *)%s, (void *)%s, (void *)%s,\n",
+			s->init, s->open, s->close);
+		fprintf(confc, "\t  (void *)%s, (void *)%s, (void *)%s,\n",
+			s->read, s->write, s->seek);
+		fprintf(confc, "\t  (void *)%s, (void *)%s, (void *)%s,\n",
+			s->getc, s->putc, s->control);
+		fprintf(confc, "\t  (void *)0x%x, (void *)%s, %d }",
+			s->csr, s->intr, s->irq);
+		if (i< ndevs-1) {
+			fprintf(confc, ",\n\n");
+		} else {
+			fprintf(confc, "\n};");
+		}
+	}
+
+	/* we must guarantee conf.c written later than conf.h for make */
+	fprintf(confc, "\n");
+	fclose(confc);
+
+	/* finish up and write report for user if requested */
+	if (verbose) {
+		printf("Configuration complete. Number of devs=%d:\n", ndevs);
+		for (i=0; i<ndevs; i++) {
+			s = &devs[i];
+			printf("Device %s (on %s)\n", s->name, s->ison);
+			printf("    csr=0x%04x, irq=0x%04x, minor=%d\n",
+				s->csr, s->irq, s->minor);
+		}
+	}
+}
+
+/************************************************************************/
+/*									*/
+/* addattr - add a new attribute spec to current type/device description*/
+/*		tok: token type (attribute type)			*/
+/*		val: symbol number of value				*/
+/*									*/
+/************************************************************************/
+
+void	addattr(int tok, int val) {
+	struct dev_ent *s;
+	char *c;
+
+	if (brkcount == 0) {
+		/* Doing types */
+		s = &dtypes[ntypes-1];
+	} else {
+		/* Doing devices */
+		s = &devs[ndevs-1];
+	}
+
+	switch (tok) {
+	case CSR:	s->csr = val;			break;
+	case IRQ:	s->irq = val;			break;
+	case INTR:	strcpy(s->intr, saveattrid);	break;
+	case READ:	strcpy(s->read, saveattrid);	break;
+	case WRITE:	strcpy(s->write,saveattrid);	break;
+	case GETC:	strcpy(s->getc, saveattrid);	break;
+	case PUTC:	strcpy(s->putc, saveattrid);	break;
+	case OPEN:	strcpy(s->open, saveattrid);	break;
+	case CLOSE:	strcpy(s->close,saveattrid);	break;
+	case INIT:	strcpy(s->init, saveattrid);	break;
+	case SEEK:	strcpy(s->seek, saveattrid);	break;
+	case CONTROL:	strcpy(s->control,saveattrid);	break;
+	default:	fprintf(stderr, "Internal error 1\n");
+	}
+}
+
+
+/************************************************************************/
+/*									*/
+/* addton -- add an "on XXX" to the current type			*/
+/*									*/
+/************************************************************************/
+
+int	addton(char *tonid) {
+	int	currtype;		/* The current type		*/
+
+	if (strlen(tonid) >= MAXNAME) {
+		fprintf(stderr,"string %s is too long on line %d\n",
+				tonid, linectr);
+		exit(1);
+	}
+	currtype = ntypes - 1;
+	strcpy(dtypes[currtype].ison, tonid);
+
+	return currtype;
+}
+
+
+/************************************************************************/
+/*									*/
+/* config_atoi - convert an ascii string of text to an integer,		*/
+/*			honoring octal, decimal, and hex		*/
+/*									*/
+/************************************************************************/
+
+int	config_atoi(char *p, int len) {
+	int base, rv;
+
+	if (*p == '0')
+	{
+		++p;
+		--len;
+		if (*p == 'x' || *p == 'X')
+		{
+			++p; --len; /* skip 'x' */
+			base = 16;
+		}
+		else
+		{
+			base = 8;
+		}
+	}
+	else
+	{
+		base = 10;
+	}
+
+	rv = 0;
+	for (; len > 0; ++p, --len)
+	{
+		rv *= base;
+		if      (isdigit(*p)) { rv += *p - '0'; }
+		else if (isupper(*p)) { rv += *p - 'A' + 10; }
+		else                  { rv += *p - 'a' + 10; }
+	}
+
+	return rv;
+}
+
+/************************************************************************/
+/*									*/
+/* devisid -- add an "is XXX" to the current device			*/
+/*									*/
+/************************************************************************/
+
+void	devisid(char *tname) {
+	int	currdev;		/* The current device		*/
+	int	i;
+
+	if (strlen(tname) >= MAXNAME) {
+		fprintf(stderr,"string %s is too long on line %d\n",
+				tname, linectr);
+		exit(1);
+	}
+	/* Verify the type exists */
+
+	for (i=0; i<ntypes; i++) {
+		if (strcmp(tname, dtypes[i].tname) == 0) {
+			break;
+		}
+	}
+	if (i >= ntypes) {
+		fprintf(stderr, "Illegal type name %s on line %d\n",
+				tname, linectr);
+		exit(1);
+	}
+	currdev = ndevs - 1;
+	strcpy(devs[currdev].tname, tname);
+
+	return;
+}
+
+
+/************************************************************************/
+/*									*/
+/* devonid -- add an "on XXX" to the current device, lookup the type,	*/
+/*		and copy attributes into the device from the type	*/
+/*									*/
+/************************************************************************/
+
+void	devonid(char *onname) {
+	int	currdev;		/* The current device		*/
+	int	i;
+	struct	dev_ent	*dptr;		/* Pointer to current device	*/
+	struct	dev_ent	*tptr;		/* Pointer to a type		*/
+	char	tmp[MAXNAME];		/* Holds the device name during	*/
+					/*   copy			*/
+
+	if (strlen(onname) >= MAXNAME) {
+		fprintf(stderr,"string %s is too long on line %d\n",
+				onname, linectr);
+		exit(1);
+	}
+	if (ndevs <=0) {
+		fprintf(stderr,"Internal error 3\n");
+		exit(1);
+	}
+	currdev = ndevs - 1;
+	dptr = &devs[currdev];
+
+	strcpy(dptr->ison, onname);
+
+	/* Lookup the device type */
+
+	for (i=0; i<ntypes; i++) {
+		tptr = &dtypes[i];
+		if ( (strcmp(dptr->tname,tptr->tname) == 0 ) &&
+		     (strcmp(dptr->ison, tptr->ison)  == 0 )  ){
+
+			/* The specified type matches the ith entry, so	*/
+			/*  set all attributes equal to the ones in the	*/
+			/*  type definition.				*/
+
+			strcpy(tmp, dptr->name);
+			bcopy (tptr, dptr, sizeof(struct dev_ent));
+			/* Increment the minor device number for the	*/
+			/*  next time the type is used			*/
+			tptr->minor++;
+			strcpy(dptr->name, tmp);
+			return;
+		}
+	}
+
+	fprintf(stderr, "Ileagal device specification on line %d\n", linectr);
+	exit(1);
+}
+
+
+/************************************************************************/
+/*									*/
+/* getattrid -- pick up and save the attribute string from an id	*/
+/*									*/
+/************************************************************************/
+
+void	getattrid(char *str) {
+
+	if (strlen(str) >= MAXNAME) {
+		fprintf(stderr,"atribute string %s is too long on line %d\n",
+				str, linectr);
+		exit(1);
+	}
+	strcpy(saveattrid, str);
+	return;
+}
+
+
+/************************************************************************/
+/*									*/
+/* newdev -- allocate an entry in devs, initialize, and fill in the name*/
+/*									*/
+/************************************************************************/
+
+void	newdev(char *name) {
+
+	struct	dev_ent	*dptr;		/* Ptr. to an entry in devs	*/
+	int	i;
+
+	if (ndevs >= NDEVS) {
+		fprintf(stderr,"Too many devices on line %d", linectr);
+		exit(1);
+	}
+	if (strlen(name) >= MAXNAME) {
+		fprintf(stderr,"Device name %s is too long on line %d\n",
+				name, linectr);
+		exit(1);
+	}
+
+	/* Verify that the device name is unique */
+
+	for (i=0; i<ndevs; i++) {
+		if (strcmp(name, devs[i].name) == 0) {
+			fprintf(stderr, "Duplicate device name %s on line %d\n",
+				name, linectr);
+			exit(1);
+		}
+	}
+
+	dptr = &devs[ndevs];
+
+	/* Initialize fields in the entry */
+
+	bzero((void *)dptr, sizeof(struct dev_ent));
+	strcpy(dptr->name,	 name);
+	ndevs++;
+	return;
+}
+
+
+/************************************************************************/
+/*									*/
+/* newtype -- allocate an entry in the type array and fill in the name	*/
+/*									*/
+/************************************************************************/
+
+int	newtype(char *name) {
+
+	struct	dev_ent	*dptr;		/* Ptr. to an entry in dtypes	*/
+	int	i;			/* Index into the type table	*/
+
+	if (ntypes >= NTYPES) {
+		fprintf(stderr,"Too many types on line %d", linectr);
+		exit(1);
+	}
+	if (strlen(name) >= MAXNAME) {
+		fprintf(stderr,"Type name %s is too long on line %d\n",
+				name, linectr);
+		exit(1);
+	}
+
+	/* Verify that the type name is unique */
+
+	for (i=0; i<ntypes; i++) {
+		if (strcmp(name, dtypes[i].tname) == 0) {
+			fprintf(stderr, "Duplicate type name %s on line %d\n",
+				name, linectr);
+			exit(1);
+		}
+	}
+
+	dptr = &dtypes[ntypes];
+
+	/* Initialize fields in the entry */
+
+	bzero((void *)dptr, sizeof(struct dev_ent));
+	strcpy(dptr->tname,	 name);
+	strncpy(dptr->intr,	"ioerr", 5);
+	strncpy(dptr->init,	"ioerr", 5);
+	strncpy(dptr->open,	"ioerr", 5);
+	strncpy(dptr->close,	"ioerr", 5);
+	strncpy(dptr->read,	"ioerr", 5);
+	strncpy(dptr->write,	"ioerr", 5);
+	strncpy(dptr->control,	"ioerr", 5);
+	strncpy(dptr->seek,	"ioerr", 5);
+	strncpy(dptr->getc,	"ioerr", 5);
+	strncpy(dptr->putc,	"ioerr", 5);
+
+	return ntypes++;
+}
+
+
+/************************************************************************/
+/*									*/
+/* yyerror - print an error message with the line number		*/
+/*									*/
+/************************************************************************/
+
+void yyerror(char *s) {
+
+	fprintf(stderr, "Syntax error in %s on line %d\n", doing, linectr);
+}
diff --git a/device/eth/ethcontrol.c b/device/eth/ethcontrol.c
new file mode 100644
index 0000000..2de1873
--- /dev/null
+++ b/device/eth/ethcontrol.c
@@ -0,0 +1,35 @@
+/* ethcontrol.c - ethcontrol */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * ethcontrol - implement control function for a quark ethernet device
+ *------------------------------------------------------------------------
+ */
+devcall	ethcontrol (
+	struct 	dentry *devptr, 	/* entry in device switch table */
+	int32	func,			/* control function		*/
+	int32	arg1,			/* argument 1, if needed	*/
+	int32	arg2			/* argument 2, if needed	*/
+	)
+{
+	struct	ethcblk *ethptr;	/* Ethertab entry pointer	*/
+	int32	retval = OK;		/* Return value of cntl function*/
+
+	ethptr = &ethertab[devptr->dvminor];
+
+	switch (func) {
+
+		/* Get MAC address */
+
+		case ETH_CTRL_GET_MAC:
+			memcpy((byte *)arg1, ethptr->devAddress,
+					ETH_ADDR_LEN);
+			break;
+
+		default:
+			return SYSERR;
+	}
+
+	return retval;
+}
diff --git a/device/eth/ethhandler.c b/device/eth/ethhandler.c
new file mode 100644
index 0000000..c0d521a
--- /dev/null
+++ b/device/eth/ethhandler.c
@@ -0,0 +1,123 @@
+/* ethhandler.c - ethhandler */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * ethhandler - TI AM335X Ethernet Interrupt Handler
+ *------------------------------------------------------------------------
+ */
+interrupt ethhandler (
+		uint32	xnum	/* IRQ number	*/
+	)
+{
+	struct	eth_a_csreg *csrptr;		/* Ethernet CSR pointer	*/
+	struct	eth_a_tx_desc *tdescptr;	/* Tx desc pointer	*/
+	struct	eth_a_rx_desc *rdescptr;	/* Rx desc pointer	*/
+	struct	ethcblk *ethptr = &ethertab[0];	/* Ethernet ctl blk ptr	*/
+
+	csrptr = (struct eth_a_csreg *)ethptr->csr;
+
+	if(xnum == ETH_AM335X_TXINT) {	/* Transmit interrupt */
+
+		/* Get pointer to first desc in queue	*/
+
+		tdescptr = (struct eth_a_tx_desc *)ethptr->txRing +
+							ethptr->txHead;
+
+		/* Defer scheduling until all descs are processed */
+
+		resched_cntl(DEFER_START);
+
+		while(semcount(ethptr->osem) < (int32)ethptr->txRingSize) {
+
+			/* If desc owned by DMA, check if we need to	*/
+			/* Restart the transmission			*/
+
+			if(tdescptr->stat & ETH_AM335X_TDS_OWN) {
+				if(csrptr->stateram->tx_hdp[0] == 0) {
+					csrptr->stateram->tx_hdp[0] =
+							(uint32)tdescptr;
+				}
+				break;
+			}
+
+			/* Acknowledge the interrupt	*/
+
+			csrptr->stateram->tx_cp[0] = (uint32)tdescptr;
+
+			/* Increment the head index of the queue	*/
+			/* And go to the next descriptor in queue	*/
+
+			ethptr->txHead++;
+			tdescptr++;
+			if(ethptr->txHead >= ethptr->txRingSize) {
+				ethptr->txHead = 0;
+				tdescptr = (struct eth_a_tx_desc *)
+							ethptr->txRing;
+			}
+
+			/* Signal the output semaphore */
+
+			signal(ethptr->osem);
+		}
+
+		/* Acknowledge the transmit interrupt */
+
+		csrptr->cpdma->eoi_vector = 0x2;
+
+		/* Resume rescheduling	*/
+
+		resched_cntl(DEFER_STOP);
+	}
+	else if(xnum == ETH_AM335X_RXINT) {	/* Receive interrupt */
+
+		/* Get the pointer to last desc in the queue	*/
+
+		rdescptr = (struct eth_a_rx_desc *)ethptr->rxRing +
+							ethptr->rxTail;
+
+		/* Defer scheduling until all descriptors are processed	*/
+
+		resched_cntl(DEFER_START);
+
+		while(semcount(ethptr->isem) < (int32)ethptr->rxRingSize) {
+
+			/* Check if we need to restart the DMA	*/
+
+			if(rdescptr->stat & ETH_AM335X_RDS_OWN) {
+				if(csrptr->stateram->rx_hdp[0] == 0) {
+					csrptr->stateram->rx_hdp[0] =
+							(uint32)rdescptr;
+				}
+				break;
+			}
+
+			/* Acknowledge the interrupt	*/
+
+			csrptr->stateram->rx_cp[0] = (uint32)rdescptr;
+
+			/* Increment the tail index of the queue	*/
+			/* And go to the next descriptor in the queue	*/
+
+			ethptr->rxTail++;
+			rdescptr++;
+			if(ethptr->rxTail >= ethptr->rxRingSize) {
+				ethptr->rxTail = 0;
+				rdescptr = (struct eth_a_rx_desc *)
+							ethptr->rxRing;
+			}
+
+			/* Signal the input semaphore	*/
+
+			signal(ethptr->isem);
+		}
+
+		/* Acknowledge the receive interrupt */
+
+		csrptr->cpdma->eoi_vector = 0x1;
+
+		/* Resume rescheduling	*/
+
+		resched_cntl(DEFER_STOP);
+	}
+}
diff --git a/device/eth/ethinit.c b/device/eth/ethinit.c
new file mode 100755
index 0000000..4f73750
--- /dev/null
+++ b/device/eth/ethinit.c
@@ -0,0 +1,403 @@
+/* ethinit.c - ethinit, eth_phy_read, eth_phy_write */
+
+#include <xinu.h>
+
+struct	eth_a_csreg eth_a_regs;
+
+struct	ethcblk ethertab[1];
+
+/*-----------------------------------------------------------------------
+ * eth_phy_read - read a PHY register
+ *-----------------------------------------------------------------------
+ */
+int32	eth_phy_read (
+		volatile struct	eth_a_mdio *mdio,/* MDIO CSR pointer	*/
+		byte	regadr,	/* PHY Register number	*/
+		byte	phyadr,	/* PHY address		*/
+		uint32	*value	/* Pointer to value 	*/
+	)
+{
+
+	/* Ethernet PHY has only 32 registers */
+
+	if(regadr > 31) {
+		return SYSERR;
+	}
+
+	/* Only 32 possible PHY addresses */
+
+	if(phyadr > 31) {
+		return SYSERR;
+	}
+
+	/* Wait for the previous access to complete */
+
+	while( (mdio->useraccess0 & ETH_AM335X_MDIOUA_GO) != 0 );
+
+	/* Start the access */
+
+	mdio->useraccess0 = (ETH_AM335X_MDIOUA_GO) |
+			    (regadr << 21) |
+			    (phyadr << 16);
+
+	/* Wait until the access is complete */
+
+	while( (mdio->useraccess0 & ETH_AM335X_MDIOUA_GO) != 0 );
+
+	/* Check if the access was successful */
+
+	if( (mdio->useraccess0 & ETH_AM335X_MDIOUA_ACK) == 0 ) {
+		return SYSERR;
+	}
+
+	/* Copy the value read */
+
+	(*value) = mdio->useraccess0 & ETH_AM335X_MDIOUA_DM;
+
+	return OK;
+}
+
+/*-----------------------------------------------------------------------
+ * eth_phy_write - write a PHY register
+ *-----------------------------------------------------------------------
+ */
+int32	eth_phy_write (
+		volatile struct	eth_a_mdio *mdio, /* MDIO CSR pointer	*/
+		byte	regadr,	/* PHY register number	*/
+		byte	phyadr,	/* PHY address		*/
+		uint32	value	/* Value to be written	*/
+	)
+{
+
+	/* There are only 32 PHY registers */
+
+	if(regadr > 31) {
+		return SYSERR;
+	}
+
+	/* There are only 32 possible PHY addresses */
+
+	if(phyadr > 31) {
+		return SYSERR;
+	}
+
+	/* Wait for the previous access to complete */
+
+	while( (mdio->useraccess0 & ETH_AM335X_MDIOUA_GO) != 0);
+
+	/* Start the access */
+
+	mdio->useraccess0 = ETH_AM335X_MDIOUA_GO |
+			    ETH_AM335X_MDIOUA_WR |
+			    (regadr << 21) |
+			    (phyadr << 16) |
+			    (value & 0xffff);
+
+	/* Wait for the access to complete */
+
+	while( (mdio->useraccess0 & ETH_AM335X_MDIOUA_GO) != 0);
+
+	return OK;
+}
+
+/*-----------------------------------------------------------------------
+ * eth_phy_reset - Reset an Ethernet PHY
+ *-----------------------------------------------------------------------
+ */
+int32	eth_phy_reset (
+		volatile struct	eth_a_mdio *mdio, /* MDIO CSR pointer	*/
+		byte	phyadr			  /* PHY Address	*/
+	)
+{
+	uint32	phyreg;	/* Variable to hold ETH PHY register value	*/
+	int32	retries;/* Number of retries				*/
+	int32	retval;	/* Return value of functions called here	*/
+
+	/* Read the PHY Control Register */
+
+	retval = eth_phy_read(mdio, ETH_PHY_CTLREG, phyadr, &phyreg);
+	if(retval == SYSERR) {
+		return SYSERR;
+	}
+
+	/* Set the Reset bit and write the register */
+
+	phyreg |= ETH_PHY_CTLREG_RESET;
+	eth_phy_write(mdio, ETH_PHY_CTLREG, phyadr, phyreg);
+
+	/* Check if Reset operation is complete */
+
+	for(retries = 0; retries < 10; retries++) {
+		if(eth_phy_read(mdio, ETH_PHY_CTLREG, phyadr, &phyreg) == SYSERR) {
+			return SYSERR;
+		}
+		if((phyreg & ETH_PHY_CTLREG_RESET) == 0) {
+			break;
+		}
+		else {
+			retries++;
+			DELAY(ETH_AM335X_INIT_DELAY);
+			continue;
+		}
+	}
+	if(retries >= 3) {
+		return SYSERR;
+	}
+
+	/* Check if the Link is established */
+
+	for(retries = 0; retries < 10; retries++) {
+		if(eth_phy_read(mdio, ETH_PHY_STATREG, phyadr, &phyreg) == SYSERR) {
+			return SYSERR;
+		}
+		if(phyreg & ETH_PHY_STATREG_LINK) {
+			break;
+		}
+		else {
+			retries++;
+			DELAY(ETH_AM335X_INIT_DELAY);
+			continue;
+		}
+	}
+	if(retries >= 3) {
+		return SYSERR;
+	}
+
+	return OK;
+}
+
+/*-----------------------------------------------------------------------
+ * ethinit - initialize the TI AM335X ethernet hardware
+ *-----------------------------------------------------------------------
+ */
+int32	ethinit	(
+		struct	dentry *devptr
+	)
+{
+	struct	ethcblk *ethptr;		/* Ethernet control blk pointer	*/
+	struct	eth_a_tx_desc *tdescptr;/* Tx descriptor pointer	*/
+	struct	eth_a_rx_desc *rdescptr;/* Rx descriptor pointer	*/
+	struct	netpacket *pktptr;	/* Packet pointer		*/
+	struct	eth_a_csreg *csrptr;	/* Ethernet CSR pointer		*/
+	uint32	phyreg;			/* Variable to store PHY reg val*/
+	int32	retval;			/* Return value			*/
+	int32	i;			/* Index variable		*/
+
+	/* Get the Ethernet control block address	*/
+	/* from the device table entry			*/
+
+	ethptr = &ethertab[devptr->dvminor];
+
+	/* Store the address of CSRs in the Ethernet control block	*/
+
+	csrptr = &eth_a_regs;
+	ethptr->csr = csrptr;
+
+	/* Initialize the addresses of all the submodules	*/
+
+	csrptr->ale = (struct eth_a_ale *)ETH_AM335X_ALE_ADDR;
+	csrptr->cpdma = (struct eth_a_cpdma *)ETH_AM335X_CPDMA_ADDR;
+	csrptr->sl = (struct eth_a_sl *)ETH_AM335X_SL1_ADDR;
+	csrptr->stateram = (struct eth_a_stateram *)
+					ETH_AM335X_STATERAM_ADDR;
+	csrptr->ss = (struct eth_a_ss *)ETH_AM335X_SS_ADDR;
+	csrptr->wr = (struct eth_a_wr *)ETH_AM335X_WR_ADDR;
+	csrptr->mdio = (struct eth_a_mdio *)ETH_AM335X_MDIO_ADDR;
+
+	/* Reset all the submodules */
+
+	csrptr->cpdma->reset = 1;
+	while(csrptr->cpdma->reset == 1);
+
+	csrptr->sl->reset = 1;
+	while(csrptr->sl->reset == 1);
+
+	csrptr->wr->reset = 1;
+	while(csrptr->wr->reset == 1) ;
+
+	csrptr->ss->reset = 1;
+	while(csrptr->ss->reset == 1) ;
+
+	/* Enable MDIO	*/
+
+	csrptr->mdio->ctrl |= ETH_AM335X_MDIOCTL_EN;
+
+	/* Reset the PHY */
+
+	retval = eth_phy_reset(csrptr->mdio, 0);
+	if(retval == SYSERR) {
+		kprintf("Cannot reset Ethernet PHY\n");
+		return SYSERR;
+	}
+
+	retval = eth_phy_read(csrptr->mdio, ETH_PHY_CTLREG, 0, &phyreg);
+	if(retval == SYSERR) {
+		return SYSERR;
+	}
+
+	if( (phyreg & ETH_PHY_CTLREG_SM) == ETH_PHY_10M ) {
+		kprintf("Ethernet Link is Up. Speed is 10Mbps\n");
+	}
+	else if( (phyreg & ETH_PHY_CTLREG_SM) == ETH_PHY_100M ) {
+		kprintf("Ethernet Link is Up. Speed is 100Mbps\n");
+	}
+	else if( (phyreg & ETH_PHY_CTLREG_SM) == ETH_PHY_1000M ) {
+		kprintf("Ethernet Link is Up. Speed is 1000Mbps\n");
+	}
+	else {
+		return SYSERR;
+	}
+
+	if(phyreg & ETH_PHY_CTLREG_FD) {
+		kprintf("Link is Full Duplex\n");
+		csrptr->sl->macctrl |= ETH_AM335X_SLCTL_FD;
+	}
+	else {
+		kprintf("Link is Half Duplex\n");
+	}
+
+	/* Read the device MAC address */
+	for(i = 0; i < 2; i++) {
+		ethptr->devAddress[4+i] = *((byte *)(0x44e10630+i));
+	}
+	for(i = 0; i < 4; i++) {
+		ethptr->devAddress[i] = *((byte *)(0x44e10634+i));
+	}
+
+	kprintf("MAC Address is: ");
+	for(i = 0; i < 5; i++) {
+		kprintf("%02X:", ethptr->devAddress[i]);
+	}
+	kprintf("%02X\n", ethptr->devAddress[5]);
+
+	/* Initialize the rx ring size field */
+	ethptr->rxRingSize = ETH_AM335X_RX_RING_SIZE;
+
+	/* Allocate memory for the rx ring */
+	ethptr->rxRing = (void*)getmem(sizeof(struct eth_a_rx_desc)*
+					ethptr->rxRingSize);
+	if((int32)ethptr->rxRing == SYSERR) {
+		return SYSERR;
+	}
+
+	/* Zero out the rx ring */
+	memset((char*)ethptr->rxRing, NULLCH,
+		sizeof(struct eth_a_rx_desc)*ethptr->rxRingSize);
+
+	/* Allocate memory for rx buffers */
+	ethptr->rxBufs = (void*)getmem(ETH_BUF_SIZE *
+					ethptr->rxRingSize);
+	if((int32)ethptr->rxBufs == SYSERR) {
+		return SYSERR;
+	}
+
+	/* Zero out the rx buffers */
+	memset((char *)ethptr->rxBufs, NULLCH, ETH_BUF_SIZE *
+						ethptr->rxRingSize);
+
+	/* Initialize the rx ring */
+
+	rdescptr = (struct eth_a_rx_desc *)ethptr->rxRing;
+	pktptr = (struct netpacket *)ethptr->rxBufs;
+
+	for(i = 0; i < ethptr->rxRingSize; i++) {
+		rdescptr->next = rdescptr + 1;
+		rdescptr->buffer = (uint32)pktptr->net_ethdst;
+		rdescptr->buflen = ETH_BUF_SIZE;
+		rdescptr->bufoff = 0;
+		rdescptr->stat = ETH_AM335X_RDS_OWN;
+		rdescptr++;
+		pktptr++;
+	}
+	(--rdescptr)->next = NULL;
+
+	ethptr->rxHead = 0;
+	ethptr->rxTail = 0;
+	ethptr->isem = semcreate(0);
+	if((int32)ethptr->isem == SYSERR) {
+		return SYSERR;
+	}
+
+	/* initialize the tx ring size */
+	ethptr->txRingSize = ETH_AM335X_TX_RING_SIZE;
+
+	/* Allocate memory for tx ring */
+	ethptr->txRing = (void*)getmem(sizeof(struct eth_a_tx_desc)*
+					ethptr->txRingSize);
+	if((int32)ethptr->txRing == SYSERR) {
+		return SYSERR;
+	}
+
+	/* Zero out the tx ring */
+	memset((char*)ethptr->txRing, NULLCH,
+		sizeof(struct eth_a_tx_desc)*ethptr->txRingSize);
+
+	/* Allocate memory for tx buffers */
+	ethptr->txBufs = (void*)getmem(ETH_BUF_SIZE *
+					ethptr->txRingSize);
+	if((int32)ethptr->txBufs == SYSERR) {
+		return SYSERR;
+	}
+
+	/* Zero out the tx buffers */
+	memset((char*)ethptr->txBufs, NULLCH, ETH_BUF_SIZE *
+						ethptr->txRingSize);
+
+	/* Initialize the tx ring */
+
+	tdescptr = (struct eth_a_tx_desc *)ethptr->txRing;
+	pktptr = (struct netpacket *)ethptr->txBufs;
+
+	for(i = 0; i < ethptr->txRingSize; i++) {
+		tdescptr->next = NULL;
+		tdescptr->buffer = (uint32)pktptr->net_ethdst;
+		tdescptr->buflen = ETH_BUF_SIZE;
+		tdescptr->bufoff = 0;
+		tdescptr->stat = (ETH_AM335X_TDS_SOP |
+				  ETH_AM335X_TDS_EOP |
+				  ETH_AM335X_TDS_DIR |
+				  ETH_AM335X_TDS_P1);
+		tdescptr++;
+		pktptr++;
+	}
+
+	ethptr->txHead = 0;
+	ethptr->txTail = 0;
+	ethptr->osem = semcreate(ethptr->txRingSize);
+	if((int32)ethptr->osem == SYSERR) {
+		return SYSERR;
+	}
+
+	/* Enable the ALE and put it into bypass mode */
+	csrptr->ale->ctrl = (ETH_AM335X_ALECTL_EN |
+			     ETH_AM335X_ALECTL_BY);
+
+	/* Put the ports 0, 1 in forwarding state */
+	csrptr->ale->portctl[0] = ETH_AM335X_ALEPCTL_FWD;
+	csrptr->ale->portctl[1] = ETH_AM335X_ALEPCTL_FWD;
+
+	/* Start the rx and tx processes in DMA */
+	csrptr->cpdma->tx_ctrl = 1;
+	csrptr->cpdma->rx_ctrl = 1;
+
+	/* Initialize the head desc pointers for tx and rx */
+	csrptr->stateram->tx_hdp[0] = 0;
+	csrptr->stateram->rx_hdp[0] = (uint32)ethptr->rxRing;
+
+	/* Enable Rx and Tx in MAC */
+	csrptr->sl->macctrl |= ETH_AM335X_SLCTL_EN;
+
+	/* Set interrupt vectors */
+	set_evec(ETH_AM335X_TXINT, (uint32)devptr->dvintr);
+	set_evec(ETH_AM335X_RXINT, (uint32)devptr->dvintr);
+
+	/* Enable the CPDMA interrupts */
+	csrptr->cpdma->tx_intmask_set = 0x1;
+	csrptr->cpdma->rx_intmask_set = 0x1;
+
+	/* Route the interrupts to core 0 */
+	csrptr->wr->c0_tx_en = 0x1;
+	csrptr->wr->c0_rx_en = 0x1;
+
+	return OK;
+}
diff --git a/device/eth/ethread.c b/device/eth/ethread.c
new file mode 100755
index 0000000..147ca17
--- /dev/null
+++ b/device/eth/ethread.c
@@ -0,0 +1,69 @@
+/* ethread.c - ethread */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * ethread - read an incoming packet on TI AM335X Ethernet
+ *------------------------------------------------------------------------
+ */
+int32	ethread	(
+		struct	dentry *devptr,
+		void	*buf,
+		uint32	count
+	)
+{
+	struct	ethcblk *ethptr;	/* Ethernet ctl blk ptr	*/
+	struct	eth_a_csreg *csrptr;	/* Ethernet CSR pointer	*/
+	struct	eth_a_rx_desc *rdescptr;/* Rx Desc. pointer	*/
+	struct	eth_a_rx_desc *prev;	/* Prev Rx desc pointer	*/
+	uint32	retval;			/* Num of bytes returned*/
+
+	ethptr = &ethertab[devptr->dvminor];
+
+	/* Get the pointer to Ethernet CSR */
+	csrptr = (struct eth_a_csreg *)ethptr->csr;
+
+	/* Wait for a packet */
+	wait(ethptr->isem);
+
+	/* Get pointer to the descriptor */
+	rdescptr = (struct eth_a_rx_desc *)ethptr->rxRing +
+						ethptr->rxHead;
+
+	/* Read the packet length */
+	retval = rdescptr->packlen;
+	if(retval > count) {
+		retval = count;
+	}
+
+	/* Copy the packet into user provided buffer */
+	memcpy((char *)buf, (char *)rdescptr->buffer, retval);
+
+	/* Initialize the descriptor for next packet */
+	rdescptr->stat = ETH_AM335X_RDS_OWN;
+	rdescptr->bufoff = 0;
+	rdescptr->buflen = ETH_BUF_SIZE;
+	rdescptr->packlen = 0;
+	rdescptr->next = NULL;
+
+	/* Insert the descriptor into Rx queue */
+	prev = (struct eth_a_rx_desc *)csrptr->stateram->rx_hdp[0];
+	if(prev == NULL) {
+		kprintf("hdp 0, adding %x\n", rdescptr);
+		csrptr->stateram->rx_hdp[0] = (uint32)rdescptr;
+	}
+	else {
+		while(prev->next != NULL) {
+			prev = prev->next;
+		}
+		prev->next = rdescptr;
+	}
+
+	/* Increment the head index of rx ring */
+	ethptr->rxHead++;
+	if(ethptr->rxHead >= ethptr->rxRingSize) {
+		ethptr->rxHead = 0;
+	}
+
+	return retval;
+}
diff --git a/device/eth/ethwrite.c b/device/eth/ethwrite.c
new file mode 100644
index 0000000..dbd5c3b
--- /dev/null
+++ b/device/eth/ethwrite.c
@@ -0,0 +1,84 @@
+/* ethwrite.c - ethwrite */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * ethwrite - enqueue a packet for transmission on TI AM335X Ethernet
+ *------------------------------------------------------------------------
+ */
+int32	ethwrite (
+		struct	dentry *devptr,
+		void	*buf,
+		uint32	count
+	)
+{
+	struct	ethcblk *ethptr;	/* Ether entry pointer	*/
+	struct	eth_a_csreg *csrptr;	/* Ethernet CSR pointer	*/
+	struct	eth_a_tx_desc *tdescptr;/* Tx Desc. pointer	*/
+	struct	eth_a_tx_desc *prev;	/* Prev. Desc. pointer	*/
+
+	ethptr = &ethertab[devptr->dvminor];
+
+	/* Get the pointer to the Ethernet CSR */
+	csrptr = (struct eth_a_csreg *)ethptr->csr;
+
+	/* Wait for an empty slot in the queue */
+	wait(ethptr->osem);
+
+	/* Get the pointer to the next descriptor */
+	tdescptr = (struct eth_a_tx_desc *)ethptr->txRing +
+							ethptr->txTail;
+
+	/* Adjust count if greater than max. possible packet size */
+	if(count > PACKLEN) {
+		count = PACKLEN;
+	}
+
+	/* Initialize the descriptor */
+	tdescptr->next = NULL;
+	tdescptr->buflen = count;
+	tdescptr->bufoff = 0;
+	tdescptr->packlen = count;
+	tdescptr->stat = (ETH_AM335X_TDS_SOP |	/* Start of packet	*/
+			  ETH_AM335X_TDS_EOP |	/* End of packet	*/
+			  ETH_AM335X_TDS_OWN |	/* Own flag set for DMA	*/
+			  ETH_AM335X_TDS_DIR |	/* Directed packet	*/
+			  ETH_AM335X_TDS_P1);	/* Output port is port1	*/
+
+	/* Copy the packet into the Tx buffer */
+	memcpy((char *)tdescptr->buffer, buf, count);
+
+	/* TODO Figure out why we need this hack	*/
+	/* This ethernet device does not send packets smaller than 60	*/
+	/* bytes; So pad a small packet to make it 60 bytes long	*/
+
+	if(count < 60) {
+		memset((char *)tdescptr->buffer+count, 0, 60-count);
+		tdescptr->buflen = 60;
+		tdescptr->packlen = 60;
+	}
+
+	/* Insert the descriptor into Tx queue */
+
+	if(csrptr->stateram->tx_hdp[0] == 0) {
+		/* Tx queue is empty, this desc. will be the first */
+		csrptr->stateram->tx_hdp[0] = (uint32)tdescptr;
+	}
+	else {
+		/* Tx queue not empty, insert at end */
+		prev = (struct eth_a_tx_desc *)
+				csrptr->stateram->tx_hdp[0];
+		while(prev->next != NULL) {
+			prev = prev->next;
+		}
+		prev->next = tdescptr;
+	}
+
+	/* Increment the tail index of the Tx ring */
+	ethptr->txTail++;
+	if(ethptr->txTail >= ethptr->txRingSize) {
+		ethptr->txTail = 0;
+	}
+
+	return count;
+}
diff --git a/device/lfs/lfdballoc.c b/device/lfs/lfdballoc.c
new file mode 100644
index 0000000..bafb418
--- /dev/null
+++ b/device/lfs/lfdballoc.c
@@ -0,0 +1,40 @@
+/* lfdballoc.c - lfdballoc */
+
+#include <xinu.h>
+
+#define  DFILL  '+'		/* character used to fill a disk block	*/
+
+/*------------------------------------------------------------------------
+ * lfdballoc  -  Allocate a new data block from free list on disk
+ *			(assumes directory mutex held)
+ *------------------------------------------------------------------------
+ */
+dbid32	lfdballoc (
+	  struct lfdbfree *dbuff /* Addr. of buffer to hold data block	*/
+	)
+{
+	dbid32	dnum;		/* ID of next d-block on the free list	*/
+	int32	retval;		/* Return value				*/
+
+	/* Get the ID of first data block on the free list */
+
+	dnum = Lf_data.lf_dir.lfd_dfree;
+	if (dnum == LF_DNULL) {	/* Ran out of free data blocks */
+		panic("out of data blocks");
+	}
+	retval = read(Lf_data.lf_dskdev, (char *)dbuff, dnum);
+	if (retval == SYSERR) {
+		panic("lfdballoc cannot read disk block\n\r");
+	}
+
+	/* Unlink d-block from in-memory directory */
+
+	Lf_data.lf_dir.lfd_dfree = dbuff->lf_nextdb;
+	write(Lf_data.lf_dskdev, (char *)&Lf_data.lf_dir, LF_AREA_DIR);
+	Lf_data.lf_dirdirty = FALSE;
+
+	/* Fill data block to erase old data */
+
+	memset((char *)dbuff, DFILL, LF_BLKSIZ);
+	return dnum;
+}
diff --git a/device/lfs/lfdbfree.c b/device/lfs/lfdbfree.c
new file mode 100644
index 0000000..d23eadc
--- /dev/null
+++ b/device/lfs/lfdbfree.c
@@ -0,0 +1,25 @@
+/* lfdbfree.c - lfdbfree */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  lfdbfree  -  Free a data block given its block number (assumes
+ *			directory mutex is held)
+ *------------------------------------------------------------------------
+ */
+status	lfdbfree(
+	  did32		diskdev,	/* ID of disk device to use	*/
+	  dbid32	dnum		/* ID of data block to free	*/
+	)
+{
+	struct	lfdir	*dirptr;	/* Pointer to directory		*/
+	struct	lfdbfree buf;		/* Buffer to hold data block	*/
+
+	dirptr = &Lf_data.lf_dir;
+	buf.lf_nextdb = dirptr->lfd_dfree;
+	dirptr->lfd_dfree = dnum;
+	write(diskdev, (char *)&buf,   dnum);
+	write(diskdev, (char *)dirptr, LF_AREA_DIR);
+
+	return OK;
+}
diff --git a/device/lfs/lfflush.c b/device/lfs/lfflush.c
new file mode 100644
index 0000000..89d1ff6
--- /dev/null
+++ b/device/lfs/lfflush.c
@@ -0,0 +1,42 @@
+/* lfflush.c - lfflush */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * lfflush  -  Flush directory, data block, and index block for an open
+ *			file (assumes file mutex is held)
+ *------------------------------------------------------------------------
+ */
+status	lfflush (
+	  struct lflcblk  *lfptr	/* Ptr to file pseudo device	*/
+	)
+{
+
+	if (lfptr->lfstate == LF_FREE) {
+		return SYSERR;
+	}
+
+	/* Write the directory if it has changed */
+
+	if (Lf_data.lf_dirdirty) {
+		write(Lf_data.lf_dskdev, (char *)&Lf_data.lf_dir,
+							LF_AREA_DIR);
+		Lf_data.lf_dirdirty = FALSE;
+	}
+
+	/* Write data block if it has changed */
+
+	if (lfptr->lfdbdirty) {
+		write(Lf_data.lf_dskdev, lfptr->lfdblock, lfptr->lfdnum);
+		lfptr->lfdbdirty = FALSE;
+	}
+
+	/* Write i-block if it has changed */
+
+	if (lfptr->lfibdirty) {
+		lfibput(Lf_data.lf_dskdev, lfptr->lfinum, &lfptr->lfiblock);
+		lfptr->lfibdirty = FALSE;
+	}
+	
+	return OK;
+}
diff --git a/device/lfs/lfgetmode.c b/device/lfs/lfgetmode.c
new file mode 100644
index 0000000..cf81090
--- /dev/null
+++ b/device/lfs/lfgetmode.c
@@ -0,0 +1,61 @@
+/* lfgetmode.c - lfgetmode */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * lfgetmode  -  Parse mode argument and generate integer of mode bits
+ *------------------------------------------------------------------------
+ */
+int32	lfgetmode (
+	 char	*mode			/* String of mode characters	*/
+	)
+{
+	int32	mbits;			/* Mode bits to return		*/
+	char	ch;			/* Next char in mode string	*/
+
+	mbits = 0;
+
+	/* Mode string specifies:					*/
+	/*	r - read						*/
+	/*	w - write						*/
+	/*	o - old (file must exist)				*/
+	/*	n - new (create a new file)				*/
+
+	while ( (ch = *mode++) != NULLCH) {
+		switch (ch) {
+
+		    case 'r':	if (mbits&LF_MODE_R) {
+					return SYSERR;
+				}
+				mbits |= LF_MODE_R;
+				continue;
+
+		    case 'w':	if (mbits&LF_MODE_W) {
+					return SYSERR;
+				}
+				mbits |= LF_MODE_W;
+				continue;
+
+		    case 'o':	if (mbits&LF_MODE_O || mbits&LF_MODE_N) {
+					return SYSERR;
+				}
+				mbits |= LF_MODE_O;
+				break;
+
+		    case 'n':	if (mbits&LF_MODE_O || mbits&LF_MODE_N) {
+					return SYSERR;
+				}
+				mbits |= LF_MODE_N;
+				break;
+
+		    default:	return SYSERR;
+		}
+	}
+
+	/* If neither read nor write specified, allow both */
+
+	if ( (mbits&LF_MODE_RW) == 0 ) {
+		mbits |= LF_MODE_RW;
+	}
+	return mbits;
+}
diff --git a/device/lfs/lfiballoc.c b/device/lfs/lfiballoc.c
new file mode 100644
index 0000000..16eb4c3
--- /dev/null
+++ b/device/lfs/lfiballoc.c
@@ -0,0 +1,33 @@
+/* lfiballoc.c - lfiballoc */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * lfiballoc  -  Allocate a new index block from free list on disk
+ *			(assumes directory mutex held)
+ *------------------------------------------------------------------------
+ */
+ibid32	lfiballoc (void)
+{
+	ibid32	ibnum;		/* ID of next block on the free list	*/
+	struct	lfiblk	iblock;	/* Buffer to hold an index block	*/
+
+	/* Get ID of first index block on free list */
+
+	ibnum = Lf_data.lf_dir.lfd_ifree;
+	if (ibnum == LF_INULL) {	/* Ran out of free index blocks */
+		panic("out of index blocks");
+	}
+	lfibget(Lf_data.lf_dskdev, ibnum, &iblock);
+
+	/* Unlink index block from the directory free list */
+
+	Lf_data.lf_dir.lfd_ifree = iblock.ib_next;
+
+	/* Write a copy of the directory to disk after the change */
+
+	write(Lf_data.lf_dskdev, (char *) &Lf_data.lf_dir, LF_AREA_DIR);
+	Lf_data.lf_dirdirty = FALSE;
+
+	return ibnum;
+}
diff --git a/device/lfs/lfibclear.c b/device/lfs/lfibclear.c
new file mode 100644
index 0000000..9d0cf3d
--- /dev/null
+++ b/device/lfs/lfibclear.c
@@ -0,0 +1,22 @@
+/* lfibclear.c - lfibclear */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  lfibclear  --  Clear an in-core copy of an index block
+ *------------------------------------------------------------------------
+ */
+void	lfibclear(
+	  struct lfiblk	*ibptr,		/* Address of i-block in memory	*/
+	  int32		offset		/* File offset for this i-block	*/
+	)
+{
+	int32	i;			/* Index for data block array 	*/
+
+	ibptr->ib_offset = offset;	/* Assign specified file offset	*/
+	for (i=0 ; i<LF_IBLEN ; i++) {	/* Clear each data block pointer*/
+		ibptr->ib_dba[i] = LF_DNULL;
+	}
+	ibptr->ib_next = LF_INULL;	/* Set next ptr to null		*/
+	return;
+}
diff --git a/device/lfs/lfibget.c b/device/lfs/lfibget.c
new file mode 100644
index 0000000..4e69f1d
--- /dev/null
+++ b/device/lfs/lfibget.c
@@ -0,0 +1,31 @@
+/* lfibget.c - lfibget */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  lfibget  -  Get an index block from disk given its number (assumes
+ *			mutex is held)
+ *------------------------------------------------------------------------
+ */
+void	lfibget(
+	  did32		diskdev,	/* Device ID of disk to use	*/
+	  ibid32	inum,		/* ID of index block to fetch	*/
+	  struct lfiblk	*ibuff		/* Buffer to hold index block	*/
+	)	
+{
+	char	*from, *to;		/* Pointers used in copying	*/
+	int32	i;			/* Loop index used during copy	*/
+	char	dbuff[LF_BLKSIZ];	/* Buffer to hold disk block	*/
+
+	/* Read disk block that contains the specified index block */
+
+	read(diskdev, dbuff, ib2sect(inum));
+
+	/* Copy specified index block to caller's ibuff */
+
+	from = dbuff + ib2disp(inum);
+	to = (char *)ibuff;
+	for (i=0 ; i<sizeof(struct lfiblk) ; i++)
+		*to++ = *from++;
+	return;
+}
diff --git a/device/lfs/lfibput.c b/device/lfs/lfibput.c
new file mode 100644
index 0000000..836328b
--- /dev/null
+++ b/device/lfs/lfibput.c
@@ -0,0 +1,43 @@
+/* lfibput.c - lfibput */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  lfibput  -  Write an index block to disk given its ID (assumes
+ *			mutex is held)
+ *------------------------------------------------------------------------
+ */
+status	lfibput(
+	  did32		diskdev,	/* ID of disk device		*/
+	  ibid32	inum,		/* ID of index block to write	*/
+	  struct lfiblk	*ibuff		/* Buffer holding the index blk	*/
+	)
+{
+	dbid32	diskblock;		/* ID of disk sector (block)	*/
+	char	*from, *to;		/* Pointers used in copying	*/
+	int32	i;			/* Loop index used during copy	*/
+	char	dbuff[LF_BLKSIZ];	/* Temp. buffer to hold d-block	*/
+
+	/* Compute disk block number and offset of index block */
+
+	diskblock = ib2sect(inum);
+	to = dbuff + ib2disp(inum);
+	from = (char *)ibuff;
+
+	/* Read disk block */
+
+	if (read(diskdev, dbuff, diskblock) == SYSERR) {
+		return SYSERR;
+	}
+
+	/* Copy index block into place */
+
+	for (i=0 ; i<sizeof(struct lfiblk) ; i++) {
+		*to++ = *from++;
+	}
+
+	/* Write the block back to disk */
+
+	write(diskdev, dbuff, diskblock);
+	return OK;
+}
diff --git a/device/lfs/lflclose.c b/device/lfs/lflclose.c
new file mode 100644
index 0000000..19ff9c4
--- /dev/null
+++ b/device/lfs/lflclose.c
@@ -0,0 +1,38 @@
+/* lflclose.c - lflclose.c */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * lflclose  -  Close a file by flushing output and freeing device entry
+ *------------------------------------------------------------------------
+ */
+devcall	lflclose (
+	  struct dentry *devptr		/* Entry in device switch table */
+	)
+{
+	struct	lflcblk	*lfptr;		/* Ptr to open file table entry	*/
+
+	/* Obtain exclusive use of the file */
+
+	lfptr = &lfltab[devptr->dvminor];
+	wait(lfptr->lfmutex);
+
+	/* If file is not open, return an error */
+
+	if (lfptr->lfstate != LF_USED) {
+		signal(lfptr->lfmutex);
+		return SYSERR;
+	}
+
+	/* Write index or data blocks to disk if they have changed */
+
+	if (Lf_data.lf_dirdirty || lfptr->lfdbdirty || lfptr->lfibdirty) {
+		lfflush(lfptr);
+	}
+
+	/* Set device state to FREE and return to caller */
+
+	lfptr->lfstate = LF_FREE;
+	signal(lfptr->lfmutex);
+	return OK;
+}
diff --git a/device/lfs/lflcontrol.c b/device/lfs/lflcontrol.c
new file mode 100644
index 0000000..a023098
--- /dev/null
+++ b/device/lfs/lflcontrol.c
@@ -0,0 +1,47 @@
+/* lflcontrol.c - lflcontrol */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * lflcontrol  -  Provide control functions for a local file pseudo-device
+ *------------------------------------------------------------------------
+ */
+devcall	lflcontrol (
+	 struct dentry	*devptr,	/* Entry in device switch table	*/
+	 int32	func,			/* A control function		*/
+	 int32	arg1,			/* Argument #1			*/
+	 int32	arg2			/* Argument #2			*/
+	)
+{
+	struct	lflcblk	*lfptr;		/* Ptr to open file table entry	*/
+	int32	retval;			/* Return value from func. call	*/
+
+	/* Obtain exclusive use of the file */
+
+	lfptr = &lfltab[devptr->dvminor];
+	wait(lfptr->lfmutex);
+
+	/* If file is not open, return an error */
+
+	if (lfptr->lfstate != LF_USED) {
+		signal(lfptr->lfmutex);
+		return SYSERR;
+	}
+
+	switch (func) {
+
+	/* Truncate a file */
+
+	case LF_CTL_TRUNC:
+		wait(Lf_data.lf_mutex);
+		retval = lftruncate(lfptr);
+		signal(Lf_data.lf_mutex);
+		signal(lfptr->lfmutex);
+		return retval;	
+
+	default:
+		kprintf("lfcontrol: function %d not valid\n\r", func);
+		signal(lfptr->lfmutex);
+		return SYSERR;
+	}
+}
diff --git a/device/lfs/lflgetc.c b/device/lfs/lflgetc.c
new file mode 100644
index 0000000..822d0c8
--- /dev/null
+++ b/device/lfs/lflgetc.c
@@ -0,0 +1,52 @@
+/* lflgetc.c - lfgetc */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * lflgetc  -  Read the next byte from an open local file
+ *------------------------------------------------------------------------
+ */
+devcall	lflgetc (
+	  struct dentry *devptr		/* Entry in device switch table */
+	)
+{
+	struct	lflcblk	*lfptr;		/* Ptr to open file table entry	*/
+	struct	ldentry	*ldptr;		/* Ptr to file's entry in the	*/
+					/*   in-memory directory	*/
+	int32	onebyte;		/* Next data byte in the file	*/
+
+	/* Obtain exclusive use of the file */
+
+	lfptr = &lfltab[devptr->dvminor];
+	wait(lfptr->lfmutex);
+
+	/* If file is not open, return an error */
+
+	if (lfptr->lfstate != LF_USED) {
+		signal(lfptr->lfmutex);
+		return SYSERR;
+	}
+
+	/* Return EOF for any attempt to read beyond the end-of-file */
+
+	ldptr = lfptr->lfdirptr;
+	if (lfptr->lfpos >= ldptr->ld_size) {
+		signal(lfptr->lfmutex);
+		return EOF;
+	}
+
+	/* If byte pointer is beyond the current data block, set up	*/
+	/*	a new data block					*/
+
+	if (lfptr->lfbyte >= &lfptr->lfdblock[LF_BLKSIZ]) {
+		lfsetup(lfptr);
+	}
+
+	/* Extract the next byte from block, update file position, and	*/
+	/*	return the byte to the caller				*/
+
+	onebyte = 0xff & *lfptr->lfbyte++;
+	lfptr->lfpos++;
+	signal(lfptr->lfmutex);
+	return onebyte;
+}
diff --git a/device/lfs/lflinit.c b/device/lfs/lflinit.c
new file mode 100644
index 0000000..c3f4e13
--- /dev/null
+++ b/device/lfs/lflinit.c
@@ -0,0 +1,46 @@
+/* lflinit.c - lflinit */
+
+#include <xinu.h>
+
+struct	lflcblk	lfltab[Nlfl];		/* Pseudo-device control blocks	*/
+
+/*------------------------------------------------------------------------
+ * lflinit  -  Initialize control blocks for local file pseudo-devices
+ *------------------------------------------------------------------------
+ */
+devcall	lflinit (
+	  struct dentry	*devptr		/* Entry in device switch table	*/
+	)
+{
+	struct	lflcblk	*lfptr;		/* Ptr. to control block entry	*/
+	int32	i;			/* Walks through name array	*/
+
+	lfptr = &lfltab[ devptr->dvminor ];
+
+	/* Initialize control block entry */
+
+	lfptr->lfstate = LF_FREE;	/* Device is currently unused	*/
+	lfptr->lfdev = devptr->dvnum;	/* Set device ID		*/
+	lfptr->lfmutex = semcreate(1);	/* Create the mutex semaphore	*/
+
+	/* Initialize the directory and file position */
+
+	lfptr->lfdirptr = (struct  ldentry *) NULL;
+	lfptr->lfpos = 0;
+	for (i=0; i<LF_NAME_LEN; i++) {
+		lfptr->lfname[i] = NULLCH;
+	}
+
+	/* Zero the in-memory index block and data block */
+
+	lfptr->lfinum = LF_INULL;
+	memset((char *) &lfptr->lfiblock, NULLCH, sizeof(struct lfiblk));
+	lfptr->lfdnum = 0;
+	memset((char *) &lfptr->lfdblock, NULLCH, LF_BLKSIZ);
+
+	/* Start with the byte beyond the current data block */
+
+	lfptr->lfbyte = &lfptr->lfdblock[LF_BLKSIZ];
+	lfptr->lfibdirty = lfptr->lfdbdirty = FALSE;
+	return OK;
+}
diff --git a/device/lfs/lflputc.c b/device/lfs/lflputc.c
new file mode 100644
index 0000000..8184c5d
--- /dev/null
+++ b/device/lfs/lflputc.c
@@ -0,0 +1,64 @@
+/* lflputc.c - lfputc */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * lflputc  -  Write a single byte to an open local file
+ *------------------------------------------------------------------------
+ */
+devcall	lflputc (
+	  struct dentry *devptr,	/* Entry in device switch table */
+	  char		ch		/* Character (byte) to write	*/
+	)
+{
+	struct	lflcblk	*lfptr;		/* Ptr to open file table entry	*/
+	struct	ldentry	*ldptr;		/* Ptr to file's entry in the	*/
+					/*  in-memory directory		*/
+
+	/* Obtain exclusive use of the file */
+
+	lfptr = &lfltab[devptr->dvminor];
+	wait(lfptr->lfmutex);
+
+	/* If file is not open, return an error */
+
+	if (lfptr->lfstate != LF_USED) {
+		signal(lfptr->lfmutex);
+		return SYSERR;
+	}
+
+	/* Return SYSERR for an attempt to skip bytes beyond the byte	*/
+	/* 	that is currently the end of the file		 	*/
+
+	ldptr = lfptr->lfdirptr;
+	if (lfptr->lfpos > ldptr->ld_size) {
+		signal(lfptr->lfmutex);
+		return SYSERR;
+	}
+
+	/* If pointer is outside current block, set up new block */
+
+	if (lfptr->lfbyte >= &lfptr->lfdblock[LF_BLKSIZ]) {
+
+		/* Set up block for current file position */
+
+		lfsetup(lfptr);
+	}
+
+	/* If appending a byte to the file, increment the file size.	*/
+	/*   Note: comparison might be equal, but should not be greater.*/
+
+	if (lfptr->lfpos >= ldptr->ld_size) {
+		ldptr->ld_size++;
+		Lf_data.lf_dirdirty = TRUE;
+	}
+
+	/* Place byte in buffer and mark buffer "dirty" */
+
+	*lfptr->lfbyte++ = ch;
+	lfptr->lfpos++;
+	lfptr->lfdbdirty = TRUE;
+
+	signal(lfptr->lfmutex);
+	return OK;
+}
diff --git a/device/lfs/lflread.c b/device/lfs/lflread.c
new file mode 100644
index 0000000..0b7cb12
--- /dev/null
+++ b/device/lfs/lflread.c
@@ -0,0 +1,39 @@
+/* lflread.c - lflread */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * lflread  -  Read from a previously opened local file
+ *------------------------------------------------------------------------
+ */
+devcall	lflread (
+	  struct dentry *devptr,	/* Entry in device switch table */
+	  char	*buff,			/* Buffer to hold bytes		*/
+	  int32	count			/* Max bytes to read		*/
+	)
+{
+	uint32	numread;		/* Number of bytes read		*/
+	int32	nxtbyte;		/* Character or SYSERR/EOF	*/
+
+	if (count < 0) {
+		return SYSERR;
+	}
+
+	/* Iterate and use lflgetc to read individual bytes */
+
+	for (numread=0 ; numread < count ; numread++) {
+		nxtbyte = lflgetc(devptr);
+		if (nxtbyte == SYSERR) {
+			return SYSERR;
+		} else if (nxtbyte == EOF) {	/* EOF before finished */
+		    if (numread == 0) {
+			return EOF;
+		    } else {
+			return numread;
+		    }
+		} else {
+			*buff++ = (char) (0xff & nxtbyte);
+		}
+	}
+	return numread;
+}
diff --git a/device/lfs/lflseek.c b/device/lfs/lflseek.c
new file mode 100644
index 0000000..e0076c2
--- /dev/null
+++ b/device/lfs/lflseek.c
@@ -0,0 +1,41 @@
+/* lflseek.c - lflseek */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * lflseek  -  Seek to a specified position in a file
+ *------------------------------------------------------------------------
+ */
+devcall	lflseek (
+	  struct dentry *devptr,	/* Entry in device switch table */
+	  uint32	offset		/* Byte position in the file	*/
+	)
+{
+	struct	lflcblk	*lfptr;		/* Ptr to open file table entry	*/
+
+	/* If file is not open, return an error */
+
+	lfptr = &lfltab[devptr->dvminor];
+	wait(lfptr->lfmutex);
+	if (lfptr->lfstate != LF_USED) {
+		signal(lfptr->lfmutex);
+		return SYSERR;
+	}
+
+	/* Verify offset is within current file size */
+
+	if (offset > lfptr->lfdirptr->ld_size) {
+		signal(lfptr->lfmutex);
+		return SYSERR;
+	}
+
+	/* Record new offset and invalidate byte pointer (i.e., force	*/
+	/*   the index and data blocks to be replaced if a successive	*/
+	/*   call is made to read or write)				*/
+
+	lfptr->lfpos = offset;
+	lfptr->lfbyte = &lfptr->lfdblock[LF_BLKSIZ];
+
+	signal(lfptr->lfmutex);
+	return OK;
+}
diff --git a/device/lfs/lflwrite.c b/device/lfs/lflwrite.c
new file mode 100644
index 0000000..ce924c4
--- /dev/null
+++ b/device/lfs/lflwrite.c
@@ -0,0 +1,29 @@
+/* lflwrite.c - lflwrite */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * lflwrite  --  Write data to a previously opened local disk file
+ *------------------------------------------------------------------------
+ */
+devcall	lflwrite (
+	  struct dentry *devptr,	/* Entry in device switch table */
+	  char	*buff,			/* Buffer holding data to write	*/
+	  int32	count			/* Number of bytes to write	*/
+	)
+{
+	int32		i;		/* Number of bytes written	*/
+
+	if (count < 0) {
+		return SYSERR;
+	}
+
+	/* Iteratate and write one byte at a time */
+
+	for (i=0; i<count; i++) {
+		if (lflputc(devptr, *buff++) == SYSERR) {
+			return SYSERR;
+		}
+	}
+	return count;
+}
diff --git a/device/lfs/lfscheck.c b/device/lfs/lfscheck.c
new file mode 100644
index 0000000..9f13dc9
--- /dev/null
+++ b/device/lfs/lfscheck.c
@@ -0,0 +1,40 @@
+/* lfscheck.c - lfscheck */
+
+#include <xinu.h>
+#include <ramdisk.h>
+
+/*------------------------------------------------------------------------
+ * lfscheck  -  Check a directory to verify it contains a Xinu file system
+ *------------------------------------------------------------------------
+ */
+status	lfscheck (
+	  struct lfdir	*dirptr		/* Ptr to an in-core directory	*/
+	)
+{
+	uint32	reverse;		/* LFS_ID in reverse byte order	*/
+
+	/* Verify the File System ID, all 0's and all 1's fields */
+
+	if ( (dirptr->lfd_fsysid != LFS_ID)       ||
+	     (dirptr->lfd_allzeros != 0x00000000) ||
+	     (dirptr->lfd_allones  != 0xffffffff) ) {
+		return SYSERR;
+	}
+
+	/* Check the reverse-order File System ID field */
+
+	reverse = ((LFS_ID>>24) & 0x000000ff) | 
+		  ((LFS_ID>> 8) & 0x0000ff00) |
+		  ((LFS_ID<< 8) & 0x00ff0000) |
+		  ((LFS_ID<<24) & 0xff000000) ;
+
+	if (dirptr->lfd_revid != reverse) {
+		return SYSERR;
+	}
+
+	/* Extra sanity check - verify file count is positive */
+	if (dirptr->lfd_nfiles < 0){
+		return SYSERR;
+	}
+	return OK;
+}
diff --git a/device/lfs/lfsckfmt.c b/device/lfs/lfsckfmt.c
new file mode 100644
index 0000000..f6e8da7
--- /dev/null
+++ b/device/lfs/lfsckfmt.c
@@ -0,0 +1,65 @@
+/* lfckfmt.c - lfckfmt */
+
+#include <xinu.h>
+#include <ramdisk.h>
+
+/*------------------------------------------------------------------------
+ * lfckfmt  -  Check the format of an initially-created disk
+ *------------------------------------------------------------------------
+ */
+status	lfsckfmt (
+	  did32		disk		/* ID of an open disk device	*/
+	)
+{
+	uint32	ibsectors;		/* Number of sectors of i-blocks*/
+	struct	lfdir	dir;		/* Buffer to hold the directory	*/
+	uint32	dblks;			/* Total free data blocks	*/
+	struct	lfiblk	iblock;		/* Space for one i-block	*/
+	struct	lfdbfree dblock;	/* Data block on the free list	*/
+	int32	lfiblks;		/* Total free index blocks	*/
+	int32	retval;
+	ibid32	nextib;
+	dbid32	nextdb;
+
+	/* Read directory */
+
+	retval = read(disk,(char *)&dir, LF_AREA_DIR);
+	if (retval == SYSERR) {
+		panic("cannot read directory");
+	}
+	kprintf("Have read directory from disk device %d\n\r",
+		disk);
+
+	/* Check to see if directory contains a Xinu file system */
+
+	if (lfscheck(&dir) == SYSERR) {
+		panic("directory does not contain a Xinu file system");
+	}
+	kprintf("Directory corresponds to a local Xinu file system\n");
+
+	/* Follow index block list */
+
+	lfiblks = 0;
+	nextib = dir.lfd_ifree;
+	kprintf("initial index block is %d\n\r", nextib);
+	while (nextib != LF_INULL) {
+		lfiblks++;
+		lfibget(disk, nextib, &iblock);
+		nextib = iblock.ib_next;
+	}
+	ibsectors = (lfiblks + 6) /7;
+	kprintf("Found %d index blocks (%d sectors)\n\r", lfiblks, ibsectors);
+
+	/* Follow data block list */
+
+	dblks = 0;
+	nextdb = dir.lfd_dfree;
+	kprintf("initial data block is %d\n\r", nextdb);
+	while (nextdb != LF_DNULL) {
+		dblks++;
+		read(disk, (char *)&dblock, nextdb);
+		nextdb = dblock.lf_nextdb;
+	}
+	kprintf("Found %d data blocks\n\r", dblks);
+	return OK;
+}
diff --git a/device/lfs/lfscreate.c b/device/lfs/lfscreate.c
new file mode 100644
index 0000000..68ba943
--- /dev/null
+++ b/device/lfs/lfscreate.c
@@ -0,0 +1,74 @@
+/* lfscreate.c - lfscreate */
+
+#include <xinu.h>
+#include <ramdisk.h>
+
+/*------------------------------------------------------------------------
+ * lfscreate  -  Create an initially-empty file system on a disk
+ *------------------------------------------------------------------------
+ */
+status	lfscreate (
+	  did32		disk,		/* ID of an open disk device	*/
+	  ibid32	lfiblks,	/* Num. of index blocks on disk	*/
+	  uint32	dsiz		/* Total size of disk in bytes	*/
+	)
+{
+	uint32	sectors;		/* Number of sectors to use	*/
+	uint32	ibsectors;		/* Number of sectors of i-blocks*/
+	uint32	ibpersector;		/* Number of i-blocks per sector*/
+	struct	lfdir	dir;		/* Buffer to hold the directory	*/
+	uint32	dblks;			/* Total free data blocks	*/
+	struct	lfiblk	iblock;		/* Space for one i-block	*/
+	struct	lfdbfree dblock;	/* Data block on the free list	*/
+	dbid32	dbindex;		/* Index for data blocks	*/
+	int32	retval;			/* Return value from func call	*/
+	int32	i;			/* Loop index			*/
+
+	/* Compute total sectors on disk */
+
+	sectors = dsiz	/ LF_BLKSIZ;	/* Truncate to full sector */
+
+	/* Compute number of sectors comprising i-blocks */
+
+	ibpersector = LF_BLKSIZ / sizeof(struct lfiblk);
+	ibsectors = (lfiblks+(ibpersector-1)) / ibpersector;/* Round up	*/
+	lfiblks = ibsectors * ibpersector;
+	if (ibsectors > sectors/2) {	/* Invalid arguments */
+		return SYSERR;
+	}
+
+	/* Create an initial directory */
+
+	memset((char *)&dir, NULLCH, sizeof(struct lfdir));
+	dir.lfd_nfiles = 0;
+	dbindex= (dbid32)(ibsectors + 1);
+	dir.lfd_dfree = dbindex;
+	dblks = sectors - ibsectors - 1;
+	retval = write(disk,(char *)&dir, LF_AREA_DIR);
+	if (retval == SYSERR) {
+		return SYSERR;
+	}
+
+	/* Create list of free i-blocks on disk */
+
+	lfibclear(&iblock, 0);
+	for (i=0; i<lfiblks-1; i++) {
+		iblock.ib_next = (ibid32)(i + 1);
+		lfibput(disk, i, &iblock);
+	}
+	iblock.ib_next = LF_INULL;
+	lfibput(disk, i, &iblock);
+
+	/* Create list of free data blocks on disk */
+
+	memset((char*)&dblock, NULLCH, LF_BLKSIZ);
+	for (i=0; i<dblks-1; i++) {
+		dblock.lf_nextdb = dbindex + 1;
+		write(disk, (char *)&dblock, dbindex);
+		dbindex++;
+	}
+	dblock.lf_nextdb = LF_DNULL;
+	write(disk, (char *)&dblock, dbindex);
+	close(disk);
+	return OK;
+}
diff --git a/device/lfs/lfsetup.c b/device/lfs/lfsetup.c
new file mode 100644
index 0000000..ff23be3
--- /dev/null
+++ b/device/lfs/lfsetup.c
@@ -0,0 +1,122 @@
+/* lfsetup.c - lfsetup */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * lfsetup  -  Set a file's index block and data block for the current
+ *		 file position (assumes file mutex held)
+ *------------------------------------------------------------------------
+ */
+status	lfsetup (
+	  struct lflcblk  *lfptr	/* Pointer to slave file device	*/
+	)
+{
+	dbid32	dnum;			/* Data block to fetch		*/
+	ibid32	ibnum;			/* I-block number during search	*/
+	struct	ldentry	*ldptr;		/* Ptr to file entry in dir.	*/
+	struct	lfiblk	*ibptr;		/* Ptr to in-memory index block	*/
+	uint32	newoffset;		/* Computed data offset for	*/
+					/*   next index block		*/
+	int32	dindex;			/* Index into array in an index	*/
+					/*   block			*/
+
+
+	/* Obtain exclusive access to the directory */
+
+	wait(Lf_data.lf_mutex);
+
+	/* Get pointers to in-memory directory, file's entry in the	*/
+	/*	directory, and the in-memory index block		*/
+
+	ldptr = lfptr->lfdirptr;
+	ibptr = &lfptr->lfiblock;
+
+	/* If existing index block or data block changed, write to disk	*/
+
+	if (lfptr->lfibdirty || lfptr->lfdbdirty) {
+		lfflush(lfptr);
+	}
+	ibnum = lfptr->lfinum;		/* Get ID of curr. index block	*/
+
+	/* If there is no index block in memory (e.g., because the file	*/
+	/*	was just opened), either load the first index block of	*/
+	/*	the file or allocate a new first index block		*/
+
+	if (ibnum == LF_INULL) {
+
+		/* Check directory entry to see if index block exists	*/
+
+		ibnum = ldptr->ld_ilist;
+		if (ibnum == LF_INULL) { /* Empty file - get new i-block*/
+			ibnum = lfiballoc();
+			lfibclear(ibptr, 0);
+			ldptr->ld_ilist = ibnum;
+			lfptr->lfibdirty = TRUE;
+		} else {		/* Nonempty - read first i-block*/
+	 		lfibget(Lf_data.lf_dskdev, ibnum, ibptr);
+		}
+		lfptr->lfinum = ibnum;
+
+	/* Otherwise, if current file position has been moved to an	*/
+	/*   offset before the current index block, start at the	*/
+	/*   beginning of the index list for the file			*/
+
+	} else if (lfptr->lfpos < ibptr->ib_offset) {
+
+		/* Load initial index block for the file (we know that	*/
+		/*	at least one index block exists)		*/
+	
+		ibnum = ldptr->ld_ilist;
+		lfibget(Lf_data.lf_dskdev, ibnum, ibptr);
+		lfptr->lfinum = ibnum;
+	}
+
+	/* At this point, an index block is in memory, but may cover	*/
+	/*  an offset less than the current file position.  Loop until	*/
+	/*  the index block covers the current file position.		*/
+
+	while ((lfptr->lfpos & ~LF_IMASK) > ibptr->ib_offset ) {
+		ibnum = ibptr->ib_next;
+		if (ibnum == LF_INULL) {
+			/* Allocate new index block to extend file */
+			ibnum = lfiballoc();
+			ibptr->ib_next = ibnum;
+			lfibput(Lf_data.lf_dskdev, lfptr->lfinum, ibptr);
+			lfptr->lfinum = ibnum;
+			newoffset = ibptr->ib_offset + LF_IDATA;
+			lfibclear(ibptr, newoffset);
+			lfptr->lfibdirty = TRUE;
+		} else {
+			lfibget(Lf_data.lf_dskdev, ibnum, ibptr);
+			lfptr->lfinum = ibnum;
+		}
+		lfptr->lfdnum = LF_DNULL; /* Invalidate old data block */
+	}
+
+	/* At this point, the index block in lfiblock covers the	*/
+	/*  current file position (i.e., position lfptr->lfpos).  The	*/
+	/*  next step consists of loading the correct data block.	*/
+
+	dindex = (lfptr->lfpos & LF_IMASK) >> 9;
+
+	/* If data block index does not match current data block, read	*/
+	/*   the correct data block from disk				*/
+
+	dnum = lfptr->lfiblock.ib_dba[dindex];
+	if (dnum == LF_DNULL) {		/* Allocate new data block */
+		dnum = lfdballoc((struct lfdbfree *)&lfptr->lfdblock);
+		lfptr->lfiblock.ib_dba[dindex] = dnum;
+		lfptr->lfibdirty = TRUE;
+	} else if ( dnum != lfptr->lfdnum) {
+		read(Lf_data.lf_dskdev, (char *)lfptr->lfdblock, dnum);
+		lfptr->lfdbdirty = FALSE;
+	}
+	lfptr->lfdnum = dnum;
+
+	/* Use current file offset to set the pointer to the next byte	*/
+	/*   within the data block					*/
+
+	lfptr->lfbyte = &lfptr->lfdblock[lfptr->lfpos & LF_DMASK];
+	signal(Lf_data.lf_mutex);
+	return OK;
+}
diff --git a/device/lfs/lfsinit.c b/device/lfs/lfsinit.c
new file mode 100644
index 0000000..d9ab814
--- /dev/null
+++ b/device/lfs/lfsinit.c
@@ -0,0 +1,32 @@
+/* lfsinit.c - lfsinit */
+
+#include <xinu.h>
+
+struct	lfdata	Lf_data;
+
+/*------------------------------------------------------------------------
+ * lfsinit  -  Initialize the local file system master device
+ *------------------------------------------------------------------------
+ */
+devcall	lfsinit (
+	  struct dentry *devptr		/* Entry in device switch table */
+	)
+{
+	/* Assign ID of disk device that will be used */
+
+	Lf_data.lf_dskdev = LF_DISK_DEV;
+
+	/* Create a mutual exclusion semaphore */
+
+	Lf_data.lf_mutex = semcreate(1);
+
+	/* Zero directory area (for debugging) */
+
+	memset((char *)&Lf_data.lf_dir, NULLCH, sizeof(struct lfdir));
+
+	/* Initialize directory to "not present" in memory */
+
+	Lf_data.lf_dirpresent = Lf_data.lf_dirdirty = FALSE;
+
+	return OK;
+}
diff --git a/device/lfs/lfsopen.c b/device/lfs/lfsopen.c
new file mode 100644
index 0000000..6ed5590
--- /dev/null
+++ b/device/lfs/lfsopen.c
@@ -0,0 +1,185 @@
+/* lfsopen.c - lfsopen */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * lfsopen - Open a file and allocate a local file pseudo-device
+ *------------------------------------------------------------------------
+ */
+devcall	lfsopen (
+	 struct	dentry	*devptr,	/* Entry in device switch table	*/
+	 char	*name,			/* Name of file to open		*/
+	 char	*mode			/* Mode chars: 'r' 'w' 'o' 'n'	*/
+	)
+{
+	struct	lfdir	*dirptr;	/* Ptr to in-memory directory	*/
+	char		*from, *to;	/* Ptrs used during copy	*/
+	char		*nam, *cmp;	/* Ptrs used during comparison	*/
+	int32		i;		/* General loop index		*/
+	did32		lfnext;		/* Minor number of an unused	*/
+					/*    file pseudo-device	*/
+	struct	ldentry	*ldptr;		/* Ptr to an entry in directory	*/
+	struct	lflcblk	*lfptr;		/* Ptr to open file table entry	*/
+	bool8		found;		/* Was the name found?		*/
+	int32	retval;			/* Value returned from function	*/
+	int32	mbits;			/* Mode bits			*/
+
+	/* Check length of name file (leaving space for NULLCH */
+
+	from = name;
+	for (i=0; i< LF_NAME_LEN; i++) {
+		if (*from++ == NULLCH) {
+			break;
+		}
+	}
+	if (i >= LF_NAME_LEN) {		/* Name is too long */
+		return SYSERR;
+	}
+
+	/* Parse mode argument and convert to binary */
+
+	mbits = lfgetmode(mode);
+	if (mbits == SYSERR) {
+		return SYSERR;
+	}
+
+	/* If named file is already open, return SYSERR */
+
+	lfnext = SYSERR;
+	for (i=0; i<Nlfl; i++) {	/* Search file pseudo-devices	*/
+		lfptr = &lfltab[i];
+		if (lfptr->lfstate == LF_FREE) {
+			if (lfnext == SYSERR) {
+				lfnext = i; /* Record index */
+			}
+			continue;
+		}
+
+		/* Compare requested name to name of open file */
+
+		nam = name;
+		cmp = lfptr->lfname;
+		while(*nam != NULLCH) {
+			if (*nam != *cmp) {
+				break;
+			}
+			nam++;
+			cmp++;
+		}
+
+		/* See if comparison succeeded */
+
+		if ( (*nam==NULLCH) && (*cmp == NULLCH) ) {
+			return SYSERR;
+		}
+	}
+	if (lfnext == SYSERR) {	/* No slave file devices are available	*/
+		return SYSERR;
+	}
+
+	/* Obtain copy of directory if not already present in memory	*/
+
+	dirptr = &Lf_data.lf_dir;
+	wait(Lf_data.lf_mutex);
+	if (! Lf_data.lf_dirpresent) {
+	    retval = read(Lf_data.lf_dskdev,(char *)dirptr,LF_AREA_DIR);
+	    if (retval == SYSERR ) {
+		signal(Lf_data.lf_mutex);
+		return SYSERR;
+	    }
+	    if (lfscheck(dirptr) == SYSERR ) {
+		kprintf("Disk does not contain a Xinu file system\n");
+		signal(Lf_data.lf_mutex);
+		return SYSERR;
+	    }
+	    Lf_data.lf_dirpresent = TRUE;
+	}
+
+	/* Search directory to see if file exists */
+
+	found = FALSE;
+	for (i=0; i<dirptr->lfd_nfiles; i++) {
+		ldptr = &dirptr->lfd_files[i];
+		nam = name;
+		cmp = ldptr->ld_name;
+		while(*nam != NULLCH) {
+			if (*nam != *cmp) {
+				break;
+			}
+			nam++;
+			cmp++;
+		}
+		if ( (*nam==NULLCH) && (*cmp==NULLCH) ) { /* Name found	*/
+			found = TRUE;
+			break;
+		}
+	}
+
+	/* Case #1 - file is not in directory (i.e., does not exist)	*/
+
+	if (! found) {
+		if (mbits & LF_MODE_O) {	/* File *must* exist	*/
+			signal(Lf_data.lf_mutex);
+			return SYSERR;
+		}
+
+		/* Take steps to create new file and add to directory	*/
+
+		/* Verify that space remains in the directory */
+
+		if (dirptr->lfd_nfiles >= LF_NUM_DIR_ENT) {
+			signal(Lf_data.lf_mutex);
+			return SYSERR;
+		}
+
+		/* Allocate next dir. entry & initialize to empty file	*/
+
+		ldptr = &dirptr->lfd_files[dirptr->lfd_nfiles++];
+		ldptr->ld_size = 0;
+		from = name;
+		to = ldptr->ld_name;
+		while ( (*to++ = *from++) != NULLCH ) {
+			;
+		}
+		ldptr->ld_ilist = LF_INULL;
+
+	/* Case #2 - file is in directory (i.e., already exists)	*/
+
+	} else if (mbits & LF_MODE_N) {		/* File must not exist	*/
+			signal(Lf_data.lf_mutex);
+			return SYSERR;
+	}
+
+	/* Initialize the local file pseudo-device */
+
+	lfptr = &lfltab[lfnext];
+	lfptr->lfstate = LF_USED;
+	lfptr->lfdirptr = ldptr;	/* Point to directory entry	*/
+	lfptr->lfmode = mbits & LF_MODE_RW;
+
+	/* File starts at position 0 */
+
+	lfptr->lfpos     = 0;
+
+	to = lfptr->lfname;
+	from = name;
+	while ( (*to++ = *from++) != NULLCH ) {
+		;
+	}
+
+	/* Neither index block nor data block are initially valid	*/
+
+	lfptr->lfinum    = LF_INULL;
+	lfptr->lfdnum    = LF_DNULL;
+
+	/* Initialize byte pointer to address beyond the end of the	*/
+	/*	buffer (i.e., invalid pointer triggers setup)		*/
+
+	lfptr->lfbyte = &lfptr->lfdblock[LF_BLKSIZ];
+	lfptr->lfibdirty = FALSE;
+	lfptr->lfdbdirty = FALSE;
+
+	signal(Lf_data.lf_mutex);
+
+	return lfptr->lfdev;
+}
diff --git a/device/lfs/lftruncate.c b/device/lfs/lftruncate.c
new file mode 100644
index 0000000..519ad71
--- /dev/null
+++ b/device/lfs/lftruncate.c
@@ -0,0 +1,104 @@
+/* lftruncate.c - lftruncate */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * lftruncate  -  Truncate a file by freeing its index and data blocks
+ *			(assumes directory mutex held)
+ *------------------------------------------------------------------------
+ */
+status	lftruncate (
+	  struct lflcblk *lfptr		/* Ptr to file's cntl blk entry	*/
+	)
+{
+	struct	ldentry	*ldptr;		/* Pointer to file's dir. entry	*/
+	struct	lfiblk	iblock;		/* Buffer for one index block	*/
+	ibid32	ifree;			/* Start of index blk free list	*/
+	ibid32	firstib;		/* First index blk of the file	*/
+	ibid32	nextib;			/* Walks down list of the	*/
+					/*   file's index blocks	*/
+	dbid32	nextdb;			/* Next data block to free	*/
+	int32	i;			/* Moves through data blocks in	*/
+					/*   a given index block	*/
+
+	ldptr = lfptr->lfdirptr;	/* Get pointer to dir. entry	*/
+	if (ldptr->ld_size == 0) {	/* File is already empty */
+		return OK;
+	}
+
+	/* Clean up the open local file first */
+
+	if ( (lfptr->lfibdirty) || (lfptr->lfdbdirty) ) {
+		lfflush(lfptr);
+	}
+	lfptr->lfpos = 0;
+	lfptr->lfinum = LF_INULL;
+	lfptr->lfdnum = LF_DNULL;
+	lfptr->lfbyte = &lfptr->lfdblock[LF_BLKSIZ];
+
+	/* Obtain ID of first index block on free list */
+
+	ifree = Lf_data.lf_dir.lfd_ifree;
+
+	/* Record file's first i-block and clear directory entry */
+
+	firstib = ldptr->ld_ilist;
+	ldptr->ld_ilist = LF_INULL;
+	ldptr->ld_size = 0;
+	Lf_data.lf_dirdirty = TRUE;
+
+	/* Walk along index block list, disposing of each data block	*/
+	/*   and clearing the corresponding pointer.  A note on loop	*/
+	/*   termination: last pointer is set to ifree below.		*/
+
+	for (nextib=firstib; nextib!=ifree; nextib=iblock.ib_next) {
+
+		/* Obtain a copy of current index block from disk	*/
+
+		lfibget(Lf_data.lf_dskdev, nextib, &iblock);
+
+		/* Free each data block in the index block		*/
+
+		for (i=0; i<LF_IBLEN; i++) {	/* For each d-block	*/
+
+			/* Free the data block */
+
+			nextdb = iblock.ib_dba[i];
+			if (nextdb != LF_DNULL) {
+				lfdbfree(Lf_data.lf_dskdev, nextdb);
+			}
+
+			/* Clear entry in i-block for this d-block	*/
+
+				iblock.ib_dba[i] = LF_DNULL;
+		}
+
+		/* Clear offset (just to make debugging easier)		*/
+
+		iblock.ib_offset = 0;
+
+		/* For the last index block on the list, make it point	*/
+		/*	to the current free list			*/
+
+		if (iblock.ib_next == LF_INULL) {
+			iblock.ib_next = ifree;
+		}
+
+		/* Write cleared i-block back to disk */
+
+		lfibput(Lf_data.lf_dskdev, nextib, &iblock);
+	}
+
+	/* Last index block on the file list now points to first node	*/
+	/*   on the current free list.  Once we make the free list	*/
+	/*   point to the first index block on the file list, the	*/
+	/*   entire set of index blocks will be on the free list	*/
+
+	Lf_data.lf_dir.lfd_ifree = firstib;
+
+	/* Indicate that directory has changed and return */
+
+	Lf_data.lf_dirdirty = TRUE;
+	
+	return OK;
+}
diff --git a/device/movidos/gpio/gpiocontrol.c b/device/movidos/gpio/gpiocontrol.c
new file mode 100644
index 0000000..4d26eee
--- /dev/null
+++ b/device/movidos/gpio/gpiocontrol.c
@@ -0,0 +1,64 @@
+/* gpiocontrol.c - gpiocontrol */
+
+#include <xinu.h>
+
+#define OFFSETMODE(x)	(x * 4)
+#define OFFSETCFG(x) 	((x * 4) + 2)
+#define OFFSETMODE2(x)	((x - 8) * 4) 
+#define OFFSETCFG2(x) 	(((x - 8) * 4) + 2)
+
+static int setmode(struct dentry * devptr, uint32 mode, uint32 pin) 
+{	
+	struct gpio_csreg * csrptr;
+	csrptr = (struct gpio_csreg *)(devptr->dvcsr);
+
+	if (pin < 8) {
+	csrptr->crl &= ~(0x3 << OFFSETMODE(pin)); // clear
+	csrptr->crl |= (mode << OFFSETMODE(pin)); 
+	}
+
+	else {
+	csrptr->crh &= ~(0x3 << OFFSETMODE2(pin)); // clear
+	csrptr->crh |= (mode << OFFSETMODE2(pin)); 
+	}
+	return 0;
+}
+
+static int setcnf(struct dentry * devptr, uint32 mode, uint32 pin) 
+{
+	struct gpio_csreg * csrptr;
+	csrptr = (struct gpio_csreg *)(devptr->dvcsr);
+
+	if (pin < 8) {
+	csrptr->crl &= ~(0x3 << OFFSETCFG(pin)); // clear
+	csrptr->crl |= (mode << OFFSETCFG(pin)); 
+	}
+	else {
+	csrptr->crh &= ~(0x3 << OFFSETCFG2(pin)); // clear
+	csrptr->crh |= (mode << OFFSETCFG2(pin)); 
+	}
+	return 0;
+}
+
+/*------------------------------------------------------------------------
+ *  gpiocontrol  -  Control a gpio device pin settings
+ *------------------------------------------------------------------------
+ */
+devcall gpiocontrol(struct dentry * devptr, int32 func, int32 mode, int32 pin) {
+
+	switch(func) {
+
+		case SETMODE: 
+			setmode(devptr, mode, pin);
+			break;
+		case SETCFG:
+			setcnf(devptr, mode, pin);
+			break;
+
+		default:
+			break;
+
+	}
+	return OK;
+
+}
diff --git a/device/movidos/gpio/gpiohandler.c b/device/movidos/gpio/gpiohandler.c
new file mode 100644
index 0000000..f0adf9a
--- /dev/null
+++ b/device/movidos/gpio/gpiohandler.c
@@ -0,0 +1,85 @@
+/* gpiohandler.c - gpiohandler */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  gpiohandler  -  Handle an interrupt for a gpio device
+ *------------------------------------------------------------------------
+ */
+void gpiohandler(
+		uint32	xnum	/* IRQ number	*/
+	)
+{
+	struct gpio_csreg *csrptr;	/* GPIO CSR pointer		*/
+	gpiointhook gphookfn;		/* The inerrupt function	*/
+
+	/* Clear all interrupts */
+
+//	if(xnum == GPIO0_INT_A)	{
+//		csrptr = (struct gpio_csreg *)(GPIO0_BASE);
+//		gphookfn = gpiotab[0].gphookfn;
+//		if(gphookfn != NULL)
+//			gphookfn(xnum, csrptr->irqstatus0);
+//		csrptr->irqstatus0 = 0xFFFFFFFF;
+//		return;
+//	}
+//	if(xnum == GPIO0_INT_B)	{
+//		csrptr = (struct gpio_csreg *)(GPIO0_BASE);
+//		gphookfn = gpiotab[0].gphookfn;
+//		if(gphookfn != NULL)
+//			gphookfn(xnum, csrptr->irqstatus1);
+//		csrptr->irqstatus1 = 0xFFFFFFFF;
+//		return;
+//	}
+//
+//	if(xnum == GPIO1_INT_A)	{
+//		csrptr = (struct gpio_csreg *)(GPIO1_BASE);
+//		gphookfn = gpiotab[1].gphookfn;
+//		if(gphookfn != NULL)
+//			gphookfn(xnum, csrptr->irqstatus0);
+//		csrptr->irqstatus0 = 0xFFFFFFFF;
+//		return;
+//	}
+//	if(xnum == GPIO1_INT_B)	{
+//		csrptr = (struct gpio_csreg *)(GPIO1_BASE);
+//		gphookfn = gpiotab[1].gphookfn;
+//		if(gphookfn != NULL)
+//			gphookfn(xnum, csrptr->irqstatus1);
+//		csrptr->irqstatus1 = 0xFFFFFFFF;
+//		return;
+//	}
+//
+//	if(xnum == GPIO2_INT_A)	{
+//		csrptr = (struct gpio_csreg *)(GPIO2_BASE);
+//		gphookfn = gpiotab[2].gphookfn;
+//		if(gphookfn != NULL)
+//			gphookfn(xnum, csrptr->irqstatus0);
+//		csrptr->irqstatus0 = 0xFFFFFFFF;
+//		return;
+//	}
+//	if(xnum == GPIO2_INT_B)	{
+//		csrptr = (struct gpio_csreg *)(GPIO2_BASE);
+//		gphookfn = gpiotab[2].gphookfn;
+//		if(gphookfn != NULL)
+//			gphookfn(xnum, csrptr->irqstatus1);
+//		csrptr->irqstatus1 = 0xFFFFFFFF;
+//		return;
+//	}
+//
+//	if(xnum == GPIO3_INT_A)	{
+//		csrptr = (struct gpio_csreg *)(GPIO3_BASE);
+//		gphookfn = gpiotab[3].gphookfn;
+//		if(gphookfn != NULL)
+//			gphookfn(xnum, csrptr->irqstatus0);
+//		csrptr->irqstatus0 = 0xFFFFFFFF;
+//		return;
+//	}
+//	if(xnum == GPIO3_INT_B)	{
+//		csrptr = (struct gpio_csreg *)(GPIO3_BASE);
+//		gphookfn = gpiotab[3].gphookfn;
+//		if(gphookfn != NULL)
+//			gphookfn(xnum, csrptr->irqstatus1);
+//		csrptr->irqstatus1 = 0xFFFFFFFF;
+//		return;
+//	}
+}
diff --git a/device/movidos/gpio/gpioinit.c b/device/movidos/gpio/gpioinit.c
new file mode 100644
index 0000000..8b3bfae
--- /dev/null
+++ b/device/movidos/gpio/gpioinit.c
@@ -0,0 +1,42 @@
+/* gpioinit.c - gpioinit */
+
+#include <xinu.h>
+
+struct	gpiocblk	gpiotab[NGPIO];
+
+/*------------------------------------------------------------------------
+ *  gpioinit  -  Initialize settings for a gpio device
+ *------------------------------------------------------------------------
+ */
+devcall	gpioinit(
+	  struct dentry	*devptr		/* Entry in device switch table	*/
+	)
+{
+	//struct gpio_csreg * csrptr;
+	struct clock_csreg * clockptr;
+	//struct gpiocblk * gpioptr;
+	//csrptr = (struct gpio_csreg *)(devptr->dvcsr);
+	clockptr = (struct clock_csreg *)CLOCK_BASE;
+	//gpioptr = &gpiotab[devptr->dvminor];
+
+	/* Enable clock on GPIO */
+	switch (devptr->dvminor) {
+		case 0:
+			clockptr->apb2enr |= (1 << IOPAEN);
+			break;
+		case 1:
+			clockptr->apb2enr |= (1 << IOPBEN);
+			break;
+		case 2:
+			clockptr->apb2enr |= (1 << IOPCEN);
+			break;
+		case 3:
+			clockptr->apb2enr |= (1 << IOPDEN);
+			break;
+		default:
+			kprintf("Failed to recognize GPIO device");
+			return SYSERR;
+	}	
+
+	return OK;
+}
diff --git a/device/movidos/gpio/gpioread.c b/device/movidos/gpio/gpioread.c
new file mode 100644
index 0000000..3d39389
--- /dev/null
+++ b/device/movidos/gpio/gpioread.c
@@ -0,0 +1,27 @@
+/* gpioread.c - gpioread */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  gpioread  -  Read aspecified set of GPIO pins
+ *------------------------------------------------------------------------
+ */
+devcall	gpioread(
+	  struct dentry	*devptr,	/* Entry in device switch table	*/
+	  char *value,			/* Pointer to a 32bit buffer	*/
+	  int32 pinmask			/* Pins from which to read	*/
+	)
+{
+//	struct gpio_csreg *csrptr;	/* Pointer to GPIO CSRs		*/
+//
+//	/* Obtain the address of the CSR from the device switch table	*/
+//
+//	csrptr = (struct gpio_csreg *)(devptr->dvcsr);
+//	
+//	/* Access the GPIO pins, use the mask to select a subset, and	*/
+//	/*	store the result in the specified buffer		*/
+//
+//	*((uint32 *)value) = csrptr->datain & pinmask;
+
+	return OK;
+}
diff --git a/device/movidos/gpio/gpioselect.c b/device/movidos/gpio/gpioselect.c
new file mode 100644
index 0000000..5d32eb8
--- /dev/null
+++ b/device/movidos/gpio/gpioselect.c
@@ -0,0 +1,25 @@
+/* gpioselect.h - pin multiplexing and control for the BBB ZCZ package */
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  gpioselect  -  Configure modes for GPIO pins
+ *------------------------------------------------------------------------
+ */
+devcall gpioselect( 	
+		uint32 pinreg,		/* Pin to be affected		*/
+		uint32 pinmode,		/* Multiplexed pin function	*/ 
+		uint32 pinsettings	/* Settings for the pin 	*/
+)	
+{
+//	volatile uint32* confreg; /* Pin configuration register */
+//
+//	/* Pick up the pin configuration register address */
+//
+//	confreg = &(((uint32*)PINMUXBASE)[pinreg]);
+//
+//	/* Apply the specified settings to the pin */
+//
+//	*confreg = pinmode|pinsettings;
+//
+	return OK;
+}
diff --git a/device/movidos/gpio/gpiowrite.c b/device/movidos/gpio/gpiowrite.c
new file mode 100644
index 0000000..047f2cc
--- /dev/null
+++ b/device/movidos/gpio/gpiowrite.c
@@ -0,0 +1,31 @@
+/* gpiowrite.c - gpiowrite */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  gpiowrite  -  Write value of gpio pins
+ *------------------------------------------------------------------------
+ */
+devcall	gpiowrite(
+	  struct dentry	*devptr,	/* Entry in device switch table	*/
+	  char *value,			/* Pointer to 32-bit buffer	*/
+	  int32 pin			/* Pins to be written written	*/
+	)
+{
+	struct gpio_csreg * csrptr;
+	uint8 val;
+	
+	csrptr = (struct gpio_csreg *)(devptr->dvcsr);
+	val = (uint8)value;
+
+	if (val == 0) {
+		csrptr->odr &= ~(1 << pin);
+		return 0;
+	}
+	else  if (val == 1) {
+		csrptr->odr |= (1 << pin);
+		return 0;
+	}
+	
+	return OK;
+}
diff --git a/device/movidos/ram/ramclose.c b/device/movidos/ram/ramclose.c
new file mode 100644
index 0000000..0580c07
--- /dev/null
+++ b/device/movidos/ram/ramclose.c
@@ -0,0 +1,14 @@
+/* ramclose.c  -  ramclose */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * Ramclose  -  Close a ram disk
+ *------------------------------------------------------------------------
+ */
+devcall	ramclose (
+	  struct dentry	*devptr		/* Entry in device switch table	*/
+	)
+{
+	return OK;
+}
diff --git a/device/movidos/ram/raminit.c b/device/movidos/ram/raminit.c
new file mode 100644
index 0000000..866140e
--- /dev/null
+++ b/device/movidos/ram/raminit.c
@@ -0,0 +1,19 @@
+/* raminit.c  -  raminit */
+
+#include <xinu.h>
+#include <ramdisk.h>
+
+struct	ramdisk	Ram;
+
+/*------------------------------------------------------------------------
+ *  raminit  -  Initialize the remote disk system device
+ *------------------------------------------------------------------------
+ */
+devcall	raminit (
+	  struct dentry	*devptr		/* Entry in device switch table	*/
+	)
+{
+	memcpy(Ram.disk, "hopeless", 8);
+	memcpy( &Ram.disk[8], Ram.disk, RM_BLKSIZ * RM_BLKS - 8);
+	return OK;
+}
diff --git a/device/movidos/ram/ramopen.c b/device/movidos/ram/ramopen.c
new file mode 100644
index 0000000..07ba1ba
--- /dev/null
+++ b/device/movidos/ram/ramopen.c
@@ -0,0 +1,19 @@
+/* ramopen.c  -  ramopen */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * ramopen  -  Open a ram disk
+ *------------------------------------------------------------------------
+ */
+
+devcall	ramopen (
+	 struct	dentry	*devptr,	/* Entry in device switch table	*/
+	 char	*name,			/* Unused for a ram disk	*/
+	 char	*mode			/* Unused for a ram disk	*/
+	)
+{
+	/* No action -- just return the device descriptor */
+
+	return devptr->dvnum;
+}
diff --git a/device/movidos/ram/ramread.c b/device/movidos/ram/ramread.c
new file mode 100644
index 0000000..07b8fbf
--- /dev/null
+++ b/device/movidos/ram/ramread.c
@@ -0,0 +1,21 @@
+/* ramread.c  -  ramread */
+
+#include <xinu.h>
+#include <ramdisk.h>
+
+/*------------------------------------------------------------------------
+ * ramread  -  Read a block from a ram disk
+ *------------------------------------------------------------------------
+ */
+devcall	ramread (
+	  struct dentry	*devptr,	/* Entry in device switch table	*/
+	  char	*buff,			/* Buffer to hold disk block	*/
+	  int32	blk			/* Block number of block to read*/
+	)
+{
+	int32	bpos;			/* Byte position of blk		*/
+
+	bpos = RM_BLKSIZ * blk;
+	memcpy(buff, &Ram.disk[bpos], RM_BLKSIZ);
+	return OK;
+}
diff --git a/device/movidos/ram/ramwrite.c b/device/movidos/ram/ramwrite.c
new file mode 100644
index 0000000..3b5f19a
--- /dev/null
+++ b/device/movidos/ram/ramwrite.c
@@ -0,0 +1,21 @@
+/* ramwrite.c  -  ramwrite */
+
+#include <xinu.h>
+#include <ramdisk.h>
+
+/*------------------------------------------------------------------------
+ * ramwrite  -  Write a block to a ram disk
+ *------------------------------------------------------------------------
+ */
+devcall	ramwrite (
+	  struct dentry	*devptr,	/* Entry in device switch table	*/
+	  char	*buff,			/* Buffer containing a block	*/
+	  int32	blk			/* Block number to write	*/
+	)
+{
+	int32	bpos;			/* Byte position of blk		*/
+
+	bpos = RM_BLKSIZ * blk;
+	memcpy(&Ram.disk[bpos], buff, RM_BLKSIZ);
+	return OK;
+}
diff --git a/device/movidos/tty/ttycontrol.c b/device/movidos/tty/ttycontrol.c
new file mode 100644
index 0000000..eeeb5e2
--- /dev/null
+++ b/device/movidos/tty/ttycontrol.c
@@ -0,0 +1,58 @@
+/* ttycontrol.c - ttycontrol */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ttycontrol  -  Control a tty device by setting modes
+ *------------------------------------------------------------------------
+ */
+devcall	ttycontrol(
+	  struct dentry	*devptr,	/* Entry in device switch table	*/
+	  int32	 func,			/* Function to perform		*/
+	  int32	 arg1,			/* Argument 1 for request	*/
+	  int32	 arg2			/* Argument 2 for request	*/
+	)
+{
+	struct	ttycblk	*typtr;		/* Pointer to tty control block	*/
+	char	ch;			/* Character for lookahead	*/
+
+	typtr = &ttytab[devptr->dvminor];
+
+	/* Process the request */
+
+	switch ( func )	{
+
+	case TC_NEXTC:
+		wait(typtr->tyisem);
+		ch = *typtr->tyitail;
+		signal(typtr->tyisem);
+		return (devcall)ch;
+
+	case TC_MODER:
+		typtr->tyimode = TY_IMRAW;
+		return (devcall)OK;
+
+	case TC_MODEC:
+		typtr->tyimode = TY_IMCOOKED;
+		return (devcall)OK;
+
+	case TC_MODEK:
+		typtr->tyimode = TY_IMCBREAK;
+		return (devcall)OK;
+
+	case TC_ICHARS:
+		return(semcount(typtr->tyisem));
+
+	case TC_ECHO:
+		typtr->tyiecho = TRUE;
+		return (devcall)OK;
+
+	case TC_NOECHO:
+		typtr->tyiecho = FALSE;
+		return (devcall)OK;
+
+	default:
+		return (devcall)SYSERR;
+	}
+
+}
diff --git a/device/movidos/tty/ttygetc.c b/device/movidos/tty/ttygetc.c
new file mode 100644
index 0000000..8388a50
--- /dev/null
+++ b/device/movidos/tty/ttygetc.c
@@ -0,0 +1,41 @@
+/* ttygetc.c - ttygetc */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ttygetc  -  Read one character from a tty device (interrupts disabled)
+ *------------------------------------------------------------------------
+ */
+devcall	ttygetc(
+	  struct dentry	*devptr		/* Entry in device switch table	*/
+	)
+{
+	char	ch;			/* Character to return		*/
+	struct	ttycblk	*typtr;		/* Pointer to ttytab entry	*/
+
+	typtr = &ttytab[devptr->dvminor];
+
+	/* Wait for a character in the buffer and extract one character	*/
+
+
+//	struct sentry * semptr;
+//	semptr = &semtab[typtr->tyisem];
+//	while(--(semptr->scount) < 0);  
+	wait(typtr->tyisem);
+	ch = *typtr->tyihead++;
+
+	/* Wrap around to beginning of buffer, if needed */
+
+	if (typtr->tyihead >= &typtr->tyibuff[TY_IBUFLEN]) {
+		typtr->tyihead = typtr->tyibuff;
+	}
+
+	/* In cooked mode, check for the EOF character */
+
+	if ( (typtr->tyimode == TY_IMCOOKED) && (typtr->tyeof) &&
+	     (ch == typtr->tyeofch) ) {
+		return (devcall)EOF;
+	}
+
+	return (devcall)ch;
+}
diff --git a/device/movidos/tty/ttyhandle_in.c b/device/movidos/tty/ttyhandle_in.c
new file mode 100644
index 0000000..1a972c7
--- /dev/null
+++ b/device/movidos/tty/ttyhandle_in.c
@@ -0,0 +1,267 @@
+/* ttyhandle_in.c - ttyhandle_in, erase1, eputc, echoch */
+
+#include <xinu.h>
+
+local	void	erase1(struct ttycblk *, struct uart_csreg *);
+local	void	echoch(char, struct ttycblk *, struct uart_csreg *);
+local	void	eputc(char, struct ttycblk *, struct uart_csreg *);
+
+/*------------------------------------------------------------------------
+ *  ttyhandle_in  -  Handle one arriving char (interrupts disabled)
+ *------------------------------------------------------------------------
+ */
+void	ttyhandle_in (
+	  struct ttycblk *typtr,	/* Pointer to ttytab entry	*/
+	  struct uart_csreg *csrptr	/* Address of UART's CSR	*/
+	)
+{
+	char	ch;			/* Next char from device	*/
+	int32	avail;			/* Chars available in buffer	*/
+
+	ch = csrptr->dr;
+
+	/* Compute chars available */
+
+	avail = semcount(typtr->tyisem);
+	if (avail < 0) {		/* One or more processes waiting*/
+		avail = 0;
+	}
+
+	/* Handle raw mode */
+
+	if (typtr->tyimode == TY_IMRAW) {
+		if (avail >= TY_IBUFLEN) { /* No space => ignore input	*/
+			return;
+		}
+
+		/* Place char in buffer with no editing */
+
+		*typtr->tyitail++ = ch;
+
+		/* Wrap buffer pointer	*/
+
+		if (typtr->tyitail >= &typtr->tyibuff[TY_IBUFLEN]) {
+			typtr->tyitail = typtr->tyibuff;
+		}
+
+		/* Signal input semaphore and return */
+		signal(typtr->tyisem);
+		return;
+	}
+
+	/* Handle cooked and cbreak modes (common part) */
+
+	if ( (ch == TY_RETURN) && typtr->tyicrlf ) {
+		ch = TY_NEWLINE;
+	}
+
+	/* If flow control is in effect, handle ^S and ^Q */
+
+	if (typtr->tyoflow) {
+		if (ch == typtr->tyostart) {	    /* ^Q starts output	*/
+			typtr->tyoheld = FALSE;
+			ttykickout(csrptr);
+			return;
+		} else if (ch == typtr->tyostop) {  /* ^S stops	output	*/
+			typtr->tyoheld = TRUE;
+			return;
+		}
+	}
+
+	typtr->tyoheld = FALSE;		/* Any other char starts output */
+
+	if (typtr->tyimode == TY_IMCBREAK) {	   /* Just cbreak mode	*/
+
+		/* If input buffer is full, send bell to user */
+
+		if (avail >= TY_IBUFLEN) {
+			eputc(typtr->tyifullc, typtr, csrptr);
+		} else {	/* Input buffer has space for this char */
+			*typtr->tyitail++ = ch;
+
+			/* Wrap around buffer */
+
+			if (typtr->tyitail>=&typtr->tyibuff[TY_IBUFLEN]) {
+				typtr->tyitail = typtr->tyibuff;
+			}
+			if (typtr->tyiecho) {	/* Are we echoing chars?*/
+				echoch(ch, typtr, csrptr);
+			}
+			signal(typtr->tyisem);
+		}
+		return;
+
+	} else {	/* Just cooked mode (see common code above) */
+
+		/* Line kill character arrives - kill entire line */
+
+		if (ch == typtr->tyikillc && typtr->tyikill) {
+			typtr->tyitail -= typtr->tyicursor;
+			if (typtr->tyitail < typtr->tyibuff) {
+				typtr->tyitail += TY_IBUFLEN;
+			}
+			typtr->tyicursor = 0;
+			eputc(TY_RETURN, typtr, csrptr);
+			eputc(TY_NEWLINE, typtr, csrptr);
+			return;
+		}
+
+		/* Erase (backspace) character */
+
+		if ( ((ch==typtr->tyierasec) || (ch==typtr->tyierasec2))
+					     && typtr->tyierase) {
+			if (typtr->tyicursor > 0) {
+				typtr->tyicursor--;
+				erase1(typtr, csrptr);
+			}
+			return;
+		}
+
+		/* End of line */
+
+		if ( (ch == TY_NEWLINE) || (ch == TY_RETURN) ) {
+			if (typtr->tyiecho) {
+				echoch(ch, typtr, csrptr);
+			}
+			*typtr->tyitail++ = ch;
+			if (typtr->tyitail>=&typtr->tyibuff[TY_IBUFLEN]) {
+				typtr->tyitail = typtr->tyibuff;
+			}
+			/* Make entire line (plus \n or \r) available */
+			signaln(typtr->tyisem, typtr->tyicursor + 1);
+			typtr->tyicursor = 0; 	/* Reset for next line	*/
+			return;
+		}
+
+		/* Character to be placed in buffer - send bell if	*/
+		/*	buffer has overflowed				*/
+
+		avail = semcount(typtr->tyisem);
+		if (avail < 0) {
+			avail = 0;
+		}
+		if ((avail + typtr->tyicursor) >= TY_IBUFLEN-1) {
+			eputc(typtr->tyifullc, typtr, csrptr);
+			return;
+		}
+
+		/* EOF character: recognize at beginning of line, but	*/
+		/*	print and ignore otherwise.			*/
+
+		if (ch == typtr->tyeofch && typtr->tyeof) {
+			if (typtr->tyiecho) {
+				echoch(ch, typtr, csrptr);
+			}
+			if (typtr->tyicursor != 0) {
+				return;
+			}
+			*typtr->tyitail++ = ch;
+			signal(typtr->tyisem);
+			return;
+		}
+
+
+		/* Echo the character */
+
+		if (typtr->tyiecho) {
+			echoch(ch, typtr, csrptr);
+		}
+
+		/* Insert in the input buffer */
+
+		typtr->tyicursor++;
+		*typtr->tyitail++ = ch;
+
+		/* Wrap around if needed */
+
+		if (typtr->tyitail >= &typtr->tyibuff[TY_IBUFLEN]) {
+			typtr->tyitail = typtr->tyibuff;
+		}
+		return;
+	}
+}
+
+/*------------------------------------------------------------------------
+ *  erase1  -  Erase one character honoring erasing backspace
+ *------------------------------------------------------------------------
+ */
+local	void	erase1(
+	  struct ttycblk	*typtr,	/* Ptr to ttytab entry		*/
+	  struct uart_csreg	*csrptr	/* Address of UART's CSRs	*/
+	)
+{
+	char	ch;			/* Character to erase		*/
+
+	if ( (--typtr->tyitail) < typtr->tyibuff) {
+		typtr->tyitail += TY_IBUFLEN;
+	}
+
+	/* Pick up char to erase */
+
+	ch = *typtr->tyitail;
+	if (typtr->tyiecho) {			   /* Are we echoing?	*/
+		if (ch < TY_BLANK || ch == 0177) { /* Nonprintable	*/
+			if (typtr->tyevis) {	/* Visual cntl chars */
+				eputc(TY_BACKSP, typtr, csrptr);
+				if (typtr->tyieback) { /* Erase char	*/
+					eputc(TY_BLANK, typtr, csrptr);
+					eputc(TY_BACKSP, typtr, csrptr);
+				}
+			}
+			eputc(TY_BACKSP, typtr, csrptr);/* Bypass up arr*/
+			if (typtr->tyieback) {
+				eputc(TY_BLANK, typtr, csrptr);
+				eputc(TY_BACKSP, typtr, csrptr);
+			}
+		} else {  /* A normal character that is printable	*/
+			eputc(TY_BACKSP, typtr, csrptr);
+			if (typtr->tyieback) {	/* erase the character	*/
+				eputc(TY_BLANK, typtr, csrptr);
+				eputc(TY_BACKSP, typtr, csrptr);
+			}
+		}
+	}
+	return;
+}
+
+/*------------------------------------------------------------------------
+ *  echoch  -  Echo a character with visual and output crlf options
+ *------------------------------------------------------------------------
+ */
+local	void	echoch(
+	  char	ch,			/* Character to	echo		*/
+	  struct ttycblk *typtr,	/* Ptr to ttytab entry		*/
+	  struct uart_csreg *csrptr	/* Address of UART's CSRs	*/
+	)
+{
+	if ((ch==TY_NEWLINE || ch==TY_RETURN) && typtr->tyecrlf) {
+		eputc(TY_RETURN, typtr, csrptr);
+		eputc(TY_NEWLINE, typtr, csrptr);
+	} else if ( (ch<TY_BLANK||ch==0177) && typtr->tyevis) {
+		eputc(TY_UPARROW, typtr, csrptr);/* print ^x		*/
+		eputc(ch+0100, typtr, csrptr);	/* Make it printable	*/
+	} else {
+		eputc(ch, typtr, csrptr);
+	}
+}
+
+/*------------------------------------------------------------------------
+ *  eputc  -  Put one character in the echo queue
+ *------------------------------------------------------------------------
+ */
+local	void	eputc(
+	  char	ch,			/* Character to	echo		*/
+	  struct ttycblk *typtr,	/* Ptr to ttytab entry		*/
+	  struct uart_csreg *csrptr	/* Address of UART's CSRs	*/
+	)
+{
+	*typtr->tyetail++ = ch;
+
+	/* Wrap around buffer, if needed */
+
+	if (typtr->tyetail >= &typtr->tyebuff[TY_EBUFLEN]) {
+		typtr->tyetail = typtr->tyebuff;
+	}
+	ttykickout(csrptr);
+	return;
+}
diff --git a/device/movidos/tty/ttyhandle_out.c b/device/movidos/tty/ttyhandle_out.c
new file mode 100644
index 0000000..a8afe35
--- /dev/null
+++ b/device/movidos/tty/ttyhandle_out.c
@@ -0,0 +1,83 @@
+/* ttyhandle_out.c - ttyhandle_out */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ttyhandle_out  -  Handle an output on a tty device by sending more
+ *		     characters to the device FIFO (interrupts disabled)
+ *------------------------------------------------------------------------
+ */
+void	ttyhandle_out(
+	 struct	ttycblk	*typtr,		/* Ptr to ttytab entry		*/
+	 struct	uart_csreg *csrptr	/* Address of UART's CSRs	*/
+	)
+{
+
+	int32	ochars;			/* Number of output chars sent	*/
+					/*   to the UART		*/
+	int32	avail;			/* Available chars in output buf*/
+	int32	uspace;			/* Space left in onboard UART	*/
+					/*   output FIFO		*/
+	//uint32 	ier = 0;
+
+	/* If output is currently held, simply ignore the call */
+
+	if (typtr->tyoheld) {
+		return;
+	}
+
+	/* If echo and output queues empty, turn off interrupts */
+
+	if ( (typtr->tyehead == typtr->tyetail) &&
+	     (semcount(typtr->tyosem) >= TY_OBUFLEN) ) {
+		csrptr->cr1 &= ~(1 << UART_INTR_TX);
+		//ier = csrptr->ier;
+		//csrptr->ier = ier & ~UART_IER_ETBEI;
+		return;
+	}
+	
+	/* Initialize uspace to the available space in the Tx FIFO */
+
+	//uspace = UART_FIFO_SIZE - csrptr->txfifo_lvl;
+	uspace = UART_FIFO_SIZE;
+
+	
+	/* While onboard FIFO is not full and the echo queue is	*/
+	/*   nonempty, xmit chars from the echo queue		*/
+
+	while ( (uspace>0) &&  typtr->tyehead != typtr->tyetail) {
+		csrptr->dr = *typtr->tyehead++;
+		if (typtr->tyehead >= &typtr->tyebuff[TY_EBUFLEN]) {
+			typtr->tyehead = typtr->tyebuff;
+		}
+		uspace--;
+	}
+
+	/* While onboard FIFO is not full and the output queue is	*/
+	/*   nonempty, transmit chars from the output queue		*/
+
+	ochars = 0;
+	avail = TY_OBUFLEN - semcount(typtr->tyosem);
+	while ( (uspace>0) &&  (avail > 0) ) {
+		//while(!(csrptr->sr & UART_TC));
+		//while(csrptr->sr &= ~(1 << UART_TEST));
+		csrptr->dr = *typtr->tyohead++;
+		if (typtr->tyohead >= &typtr->tyobuff[TY_OBUFLEN]) {
+			typtr->tyohead = typtr->tyobuff;
+		}
+		avail--;
+		uspace--;
+		ochars++;
+	}
+	if (ochars > 0) {
+		signaln(typtr->tyosem, ochars);
+	}
+
+	if ( (typtr->tyehead == typtr->tyetail) &&
+	     (semcount(typtr->tyosem) >= TY_OBUFLEN) ) {
+		csrptr->cr1 &= ~(1 << UART_INTR_TX);
+		//ier = csrptr->ier;
+		//csrptr->ier = (ier & ~UART_IER_ETBEI);
+	}
+	return;
+}
diff --git a/device/movidos/tty/ttyhandler.c b/device/movidos/tty/ttyhandler.c
new file mode 100644
index 0000000..6aa2a54
--- /dev/null
+++ b/device/movidos/tty/ttyhandler.c
@@ -0,0 +1,114 @@
+/* ttyhandler.c - ttyhandler */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ttyhandler  -  Handle an interrupt for a tty (serial) device
+ *------------------------------------------------------------------------
+ */
+void ttyhandler(uint32 xnum) {
+	struct	dentry	*devptr;	/* Address of device control blk*/
+	struct	ttycblk	*typtr;		/* Pointer to ttytab entry	*/	
+	struct	uart_csreg *csrptr;	/* Address of UART's CSR	*/
+//	uint32	iir = 0;		/* Interrupt identification	*/
+//	uint32	lsr = 0;		/* Line status			*/
+//
+//
+	/* Get CSR address of the device (assume console for now) */
+
+	devptr = (struct dentry *) &devtab[CONSOLE];
+	csrptr = (struct uart_csreg *) devptr->dvcsr;
+
+	/* Obtain a pointer to the tty control block */
+
+	typtr = &ttytab[devptr->dvminor];
+
+	/* Test type of UART interrupt */
+
+	uint8 flags = csrptr->sr & 0xFF;
+	//kprintf("%x", flags);	
+	if (flags & UART_RXNE) {
+		ttyhandle_in(typtr, csrptr);
+		return;
+	}
+	
+	else if (flags & UART_TC)  {
+		ttyhandle_out(typtr, csrptr);
+		return;
+		
+	}
+	
+//	switch(flags) {
+//
+//		case UART_TC_TXE:
+//		case UART_TC:
+//			ttyhandle_out(typtr, csrptr);
+//			return;
+//		case UART_RXNE:
+//			ttyhandle_in(typtr, csrptr);
+//			return;
+//
+//		default:
+//			kprintf("Unknown status\n");
+//			return;
+//	}
+
+//	/* Decode hardware interrupt request from UART device */
+//
+//        /* Check interrupt identification register */
+//	iir = csrptr->iir;
+//        if (iir & UART_IIR_IRQ) {
+//		return;
+//        }
+//
+//	/* Decode the interrupt cause based upon the value extracted	*/
+//	/* from the UART interrupt identification register.  Clear	*/
+//	/* the interrupt source and perform the appropriate handling	*/
+//	/* to coordinate with the upper half of the driver		*/
+//
+//        /* Decode the interrupt cause */
+//
+//	iir &= UART_IIR_IDMASK;		/* Mask off the interrupt ID */
+//        switch (iir) {
+//
+//	    /* Receiver line status interrupt (error) */
+//
+//	    case UART_IIR_RLSI:
+//		lsr = csrptr->lsr;
+//		if(lsr & UART_LSR_BI) { /* Break Interrupt */
+//
+//			/* Read the RHR register to acknowledge */
+//
+//			lsr = csrptr->buffer;
+//		}
+//		return;
+//
+//	    /* Receiver data available or timed out */
+//
+//	    case UART_IIR_RDA:
+//	    case UART_IIR_RTO:
+//
+//		resched_cntl(DEFER_START);
+//
+//		/* While chars avail. in UART buffer, call ttyhandle_in	*/
+//
+//		while ( (csrptr->lsr & UART_LSR_DR) != 0) {
+//			ttyhandle_in(typtr, csrptr);
+//                }
+//
+//		resched_cntl(DEFER_STOP);
+//
+//		return;
+//
+//            /* Transmitter output FIFO is empty (i.e., ready for more)	*/
+//
+//	    case UART_IIR_THRE:
+//		ttyhandle_out(typtr, csrptr);
+//		return;
+//
+//	    /* Modem status change (simply ignore) */
+//
+//	    case UART_IIR_MSC:
+//		return;
+//	    }
+}
diff --git a/device/movidos/tty/ttyinit.c b/device/movidos/tty/ttyinit.c
new file mode 100644
index 0000000..1706780
--- /dev/null
+++ b/device/movidos/tty/ttyinit.c
@@ -0,0 +1,83 @@
+/* ttyinit.c - ttyinit */
+
+#include <xinu.h>
+
+struct	ttycblk	ttytab[Ntty];
+
+/*------------------------------------------------------------------------
+ *  ttyinit  -  Initialize buffers and modes for a tty line
+ *------------------------------------------------------------------------
+ */
+devcall	ttyinit(
+	  struct dentry	*devptr		/* Entry in device switch table	*/
+	)
+{
+	struct	ttycblk	*typtr;		/* Pointer to ttytab entry	*/
+	struct	uart_csreg *uptr;	/* Address of UART's CSRs	*/
+
+	typtr = &ttytab[ devptr->dvminor ];
+
+	/* Initialize values in the tty control block */
+
+	typtr->tyihead = typtr->tyitail = 	/* Set up input queue	*/
+		&typtr->tyibuff[0];		/*    as empty		*/
+	typtr->tyisem = semcreate(0);		/* Input semaphore	*/
+	typtr->tyohead = typtr->tyotail = 	/* Set up output queue	*/
+		&typtr->tyobuff[0];		/*    as empty		*/
+	typtr->tyosem = semcreate(TY_OBUFLEN);	/* Output semaphore	*/
+	typtr->tyehead = typtr->tyetail = 	/* Set up echo queue	*/
+		&typtr->tyebuff[0];		/*    as empty		*/
+	typtr->tyimode = TY_IMCOOKED;		/* Start in cooked mode	*/
+	typtr->tyiecho = TRUE;			/* Echo console input	*/
+	typtr->tyieback = TRUE;			/* Honor erasing bksp	*/
+	typtr->tyevis = TRUE;			/* Visual control chars	*/
+	typtr->tyecrlf = TRUE;			/* Echo CRLF for NEWLINE*/
+	typtr->tyicrlf = TRUE;			/* Map CR to NEWLINE	*/
+	typtr->tyierase = TRUE;			/* Do erasing backspace	*/
+	typtr->tyierasec = TY_BACKSP;		/* Primary erase char	*/
+	typtr->tyierasec2= TY_BACKSP2;		/* Alternate erase char	*/
+	typtr->tyeof = TRUE;			/* Honor eof on input	*/
+	typtr->tyeofch = TY_EOFCH;		/* End-of-file character*/
+	typtr->tyikill = TRUE;			/* Allow line kill	*/
+	typtr->tyikillc = TY_KILLCH;		/* Set line kill to ^U	*/
+	typtr->tyicursor = 0;			/* Start of input line	*/
+	typtr->tyoflow = TRUE;			/* Handle flow control	*/
+	typtr->tyoheld = FALSE;			/* Output not held	*/
+	typtr->tyostop = TY_STOPCH;		/* Stop char is ^S	*/
+	typtr->tyostart = TY_STRTCH;		/* Start char is ^Q	*/
+	typtr->tyocrlf = TRUE;			/* Send CRLF for NEWLINE*/
+	typtr->tyifullc = TY_FULLCH;		/* Send ^G when buffer	*/
+						/*   is full		*/
+
+	/* Initialize UART */
+	struct 	gpio_csreg *gptr;	
+	struct 	clock_csreg *cptr;
+
+	/* Enable 'clock' on peripherals */
+	cptr = (struct clock_csreg *)CLOCK_BASE;
+	cptr->apb2enr |= (1 << IOPAEN) | (1 << USART1EN);
+
+	/* Set in and output mode */
+	gptr = (struct gpio_csreg *)(0x40010800);
+	gptr->crh = 0x44444894;
+
+	/* Enable peripheral */
+	uptr = (struct uart_csreg *)(0x40013800);
+	uptr->cr1 &= ~(1 << UART_EN);
+	
+	/* Set baudrate 115200 */
+	uptr->brr = 0x00000045;
+	
+	uptr->cr1 |= (1 << UART_TX_EN) | (1 << UART_RX_EN); /* Enable lines */
+	uptr->cr1 |= (1 << UART_INTR_RX) | (1 << UART_INTR_TX); /* Enable interrupts */ 
+
+	/* Set and enable interrupt vector */
+	set_evec(devptr->dvirq, (uint32)devptr->dvintr);
+	*NVIC_ISER1 |= (1 << 5);
+
+	/* Start the device */
+	uptr->cr1 |= (1 << UART_EN);
+
+//	ttykickout(uptr);
+	return OK;
+}
diff --git a/device/movidos/tty/ttykickout.c b/device/movidos/tty/ttykickout.c
new file mode 100644
index 0000000..c36e655
--- /dev/null
+++ b/device/movidos/tty/ttykickout.c
@@ -0,0 +1,19 @@
+/* ttykickout.c - ttykickout */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ttykickout  -  "Kick" the hardware for a tty device, causing it to
+ *		     generate an output interrupt (interrupts disabled)
+ *------------------------------------------------------------------------
+ */
+void	ttykickout(
+	 struct uart_csreg *csrptr	/* Address of UART's CSRs	*/
+	)
+{
+	/* Force the UART hardware generate an output interrupt */
+	csrptr->cr1 |= (1 << UART_INTR_TX);
+	*NVIC_STIR = 0x25; /* Generate general UART interrupt */
+
+	return;
+}
diff --git a/device/movidos/tty/ttyputc.c b/device/movidos/tty/ttyputc.c
new file mode 100644
index 0000000..fbdac51
--- /dev/null
+++ b/device/movidos/tty/ttyputc.c
@@ -0,0 +1,44 @@
+/* ttyputc.c - ttyputc */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ttyputc  -  Write one character to a tty device (interrupts disabled)
+ *------------------------------------------------------------------------
+ */
+devcall	ttyputc(
+	struct	dentry	*devptr,	/* Entry in device switch table	*/
+	char	ch			/* Character to write		*/
+	)
+{
+	//struct uart_csreg * uptr;
+	struct	ttycblk	*typtr;		/* Pointer to tty control block	*/
+
+	//uptr = (struct uart_csreg *)devptr->csreg;
+	typtr = &ttytab[devptr->dvminor];
+
+	/* Handle output CRLF by sending CR first */
+
+        if ( ch==TY_NEWLINE && typtr->tyocrlf ) {
+                ttyputc(devptr, TY_RETURN);
+	}
+
+
+	wait(typtr->tyosem);		/* Wait	for space in queue */
+	*typtr->tyotail++ = ch;
+
+	/* Wrap around to beginning of buffer, if needed */
+
+	if (typtr->tyotail >= &typtr->tyobuff[TY_OBUFLEN]) {
+		typtr->tyotail = typtr->tyobuff;
+	}
+
+	/* Start output in case device is idle */
+	//while () {
+	//	
+	//	uptr->dr =
+	//}
+	ttykickout((struct uart_csreg *)devptr->dvcsr);
+
+	return OK;
+}
diff --git a/device/movidos/tty/ttyread.c b/device/movidos/tty/ttyread.c
new file mode 100644
index 0000000..b9b4f57
--- /dev/null
+++ b/device/movidos/tty/ttyread.c
@@ -0,0 +1,68 @@
+/* ttyread.c - ttyread */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ttyread  -  Read character(s) from a tty device (interrupts disabled)
+ *------------------------------------------------------------------------
+ */
+devcall	ttyread(
+	  struct dentry	*devptr,	/* Entry in device switch table	*/
+	  char	*buff,			/* Buffer of characters		*/
+	  int32	count 			/* Count of character to read	*/
+	)
+{
+	struct	ttycblk	*typtr;		/* Pointer to tty control block	*/
+	int32	avail;			/* Characters available in buff.*/
+	int32	nread;			/* Number of characters read	*/
+	int32	firstch;		/* First input character on line*/
+	char	ch;			/* Next input character		*/
+
+	if (count < 0) {
+		return SYSERR;
+	}
+	typtr= &ttytab[devptr->dvminor];
+
+	if (typtr->tyimode != TY_IMCOOKED) {
+
+		/* For count of zero, return all available characters */
+
+		if (count == 0) {
+			avail = semcount(typtr->tyisem);
+			if (avail == 0) {
+				return 0;
+			} else {
+				count = avail;
+			}
+		}
+		for (nread = 0; nread < count; nread++) {
+			*buff++ = (char) ttygetc(devptr);
+		}
+		return nread;
+	}
+
+	/* Block until input arrives */
+
+	firstch = ttygetc(devptr);
+
+	/* Check for End-Of-File */
+
+	if (firstch == EOF) {
+		return EOF;
+	}
+
+	/* Read up to a line */
+
+	ch = (char) firstch;
+	*buff++ = ch;
+	nread = 1;
+	while ( (nread < count) && (ch != TY_NEWLINE) &&
+			(ch != TY_RETURN) ) {
+		ch = ttygetc(devptr);
+		*buff++ = ch;
+		nread++;
+	}
+	return nread;
+
+	return OK;
+}
diff --git a/device/movidos/tty/ttywrite.c b/device/movidos/tty/ttywrite.c
new file mode 100644
index 0000000..f9f4ada
--- /dev/null
+++ b/device/movidos/tty/ttywrite.c
@@ -0,0 +1,29 @@
+/* ttywrite.c - ttywrite */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ttywrite  -  Write character(s) to a tty device (interrupts disabled)
+ *------------------------------------------------------------------------
+ */
+devcall	ttywrite(
+	  struct dentry	*devptr,	/* Entry in device switch table	*/
+	  char	*buff,			/* Buffer of characters		*/
+	  int32	count 			/* Count of character to write	*/
+	)
+{
+	/* Handle negative and zero counts */
+
+	if (count < 0) {
+		return SYSERR;
+	} else if (count == 0){
+		return OK;
+	}
+
+	/* Write count characters one at a time */
+
+	for (; count>0 ; count--) {
+		ttyputc(devptr, *buff++);
+	}
+	return OK;
+}
diff --git a/device/nam/mount.c b/device/nam/mount.c
new file mode 100644
index 0000000..90ac46f
--- /dev/null
+++ b/device/nam/mount.c
@@ -0,0 +1,76 @@
+/* mount.c - mount, namlen */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  mount  -  Add a prefix mapping to the name space
+ *------------------------------------------------------------------------
+ */
+syscall	mount(
+	  char		*prefix,	/* Prefix to add		*/
+	  char		*replace,	/* Replacement string		*/
+	  did32		device		/* Device ID to use		*/
+)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	nmentry	*namptr;	/* Pointer to unused table entry*/
+	int32	psiz, rsiz;		/* Sizes of prefix & replacement*/
+	int32	i;			/* Counter for copy loop	*/
+
+        mask = disable();
+
+	psiz = namlen(prefix, NM_PRELEN);
+	rsiz = namlen(replace, NM_REPLLEN);
+
+	/* If arguments are invalid or table is full, return error */
+
+	if ( (psiz == SYSERR)   || (rsiz == SYSERR) ||
+	     (isbaddev(device)) || (nnames >= NNAMES) ) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	/* Allocate a slot in the table */
+
+	namptr = &nametab[nnames];	/* Next unused entry in table	*/
+
+	/* copy prefix and replacement strings and record device ID */
+	
+	for (i=0; i<psiz; i++) {	/* Copy prefix into table entry	*/
+		namptr->nprefix[i] = *prefix++;
+	}
+
+	for (i=0; i<rsiz; i++) {	/* Copy replacement into entry	*/
+		namptr->nreplace[i] = *replace++;
+	}
+
+	namptr->ndevice = device;	/* Record the device ID		*/
+
+        nnames++;			/* Increment number of names	*/
+
+	restore(mask);
+	return OK;
+}
+
+
+/*------------------------------------------------------------------------
+ *  namlen  -  Compute the length of a string stopping at maxlen
+ *------------------------------------------------------------------------
+ */
+int32	namlen(
+	  char		*name,		/* Name to use			*/
+	  int32		maxlen		/* Maximum length (including a	*/
+					/*   NULLCH)			*/
+)
+{
+	int32	i;			/* Count of characters found	*/
+
+	/* Search until a null terminator or length reaches max */
+
+	for (i=0; i < maxlen; i++) {
+		if (*name++ == NULLCH) {
+			return i+1;	/* Include NULLCH in length */
+		}
+	}
+	return SYSERR;
+}
diff --git a/device/nam/naminit.c b/device/nam/naminit.c
new file mode 100644
index 0000000..35b479b
--- /dev/null
+++ b/device/nam/naminit.c
@@ -0,0 +1,93 @@
+/* naminit.c - naminit */
+
+#include <xinu.h>
+
+#ifndef	RFILESYS
+#define	RFILESYS	SYSERR
+#endif
+
+#ifndef	FILESYS
+#define	FILESYS		SYSERR
+#endif
+
+#ifndef	LFILESYS
+#define	LFILESYS	SYSERR
+#endif
+
+struct	nmentry	nametab[NNAMES];	/* Table of name mappings	*/
+int32	nnames;				/* Number of entries allocated	*/
+
+/*------------------------------------------------------------------------
+ *  naminit  -  Initialize the syntactic namespace
+ *------------------------------------------------------------------------
+ */
+status	naminit(void)
+{
+	did32	i;			/* Index into devtab		*/
+	struct	dentry *devptr;		/* Pointer to device table entry*/
+	char	tmpstr[NM_MAXLEN];	/* String to hold a name	*/
+	status	retval;			/* Return value			*/
+	char	*tptr;			/* Pointer into tempstring	*/
+	char	*nptr;			/* Pointer to device name	*/
+	char	devprefix[] = "/dev/";	/* Prefix to use for devices	*/
+	int32	len;			/* Length of created name	*/
+	char	ch;			/* Storage for a character	*/
+
+	/* Set prefix table to empty */
+
+	nnames = 0;
+
+	for (i=0; i<NDEVS ; i++) {
+		tptr = tmpstr;
+		nptr = devprefix;
+
+		/* Copy prefix into tmpstr */
+
+		len = 0;
+		while ((*tptr++ = *nptr++) != NULLCH) {
+			len++;
+	        }
+                tptr--; /* Move pointer to position before NULLCH */
+		devptr = &devtab[i];
+		nptr = devptr->dvname;	/* Move to device name */
+
+		/* Map device name to lower case and append */
+
+		while(++len < NM_MAXLEN) {
+			ch = *nptr++;
+			if ( (ch >= 'A') && (ch <= 'Z')) {
+				ch += 'a' - 'A';
+			}
+			if ( (*tptr++ = ch) == NULLCH) {
+				break;
+			}
+		}
+
+		if (len > NM_MAXLEN) {
+			// RAFA kprintf("namespace: device name %s too long\r\n",
+			kprintf(&m5[0],
+					devptr->dvname);
+			continue;
+		}
+
+		retval = mount(tmpstr, NULLSTR, devptr->dvnum);
+                if (retval == SYSERR) {
+			// RAFA kprintf("namespace: cannot mount device %d\r\n",
+			kprintf(&m4[0],
+					devptr->dvname);
+			continue;
+		}
+	}
+
+	/* Add other prefixes (longest prefix first) */
+
+        mount("/dev/null",	"",        NULLDEV);
+//	mount("/remote/",	"remote:", RFILESYS);
+//	mount("/local/",	NULLSTR,   LFILESYS);
+	mount("/dev/",		NULLSTR,   SYSERR);
+ //       mount("~/",		NULLSTR,   LFILESYS);
+//	mount("/",		"root:",   RFILESYS);
+//	mount("",		"",        LFILESYS);
+
+	return OK;
+}
diff --git a/device/nam/nammap.c b/device/nam/nammap.c
new file mode 100644
index 0000000..1aa23e7
--- /dev/null
+++ b/device/nam/nammap.c
@@ -0,0 +1,135 @@
+/* nammap.c - nammap, namrepl, namcpy */
+
+#include <xinu.h>
+
+status	namcpy(char *, char *, int32);
+did32	namrepl(char *, char[]);
+
+/*------------------------------------------------------------------------
+ *  nammap  -  Using namespace, map name to new name and new device
+ *------------------------------------------------------------------------
+ */
+devcall	nammap(
+	 char	*name,			/* The name to map		*/
+	 char	newname[NM_MAXLEN],	/* Buffer for mapped name	*/
+	 did32 namdev			/* ID of the namespace device	*/
+	)
+{
+	did32	newdev;			/* Device descriptor to return	*/
+	char	tmpname[NM_MAXLEN];	/* Temporary buffer for name	*/
+	int32	iter;			/* Number of iterations		*/
+
+	/* Place original name in temporary buffer and null terminate */
+
+	if (namcpy(tmpname, name, NM_MAXLEN) == SYSERR) {
+		return SYSERR;
+	}
+
+	/* Repeatedly substitute the name prefix until a non-namespace	*/
+	/*   device is reached or an iteration limit is exceeded	*/
+
+	for (iter=0; iter<nnames ; iter++) {
+		newdev = namrepl(tmpname, newname);
+		if (newdev != namdev) {
+			return newdev;	/* Either valid ID or SYSERR	*/
+		}
+		namcpy(tmpname, newname, NM_MAXLEN);
+	}
+	return SYSERR;
+}
+
+/*------------------------------------------------------------------------
+ *  namrepl  -  Use the name table to perform prefix substitution
+ *------------------------------------------------------------------------
+ */
+did32	namrepl(
+	 char	*name,			/* Original name		*/
+	 char	newname[NM_MAXLEN]	/* Buffer for mapped name	*/
+	)
+{
+	int32	i;			/* Iterate through name table	*/
+	char	*pptr;			/* Walks through a prefix	*/
+	char	*rptr;			/* Walks through a replacement	*/
+	char	*optr;			/* Walks through original name	*/
+        char    *nptr;                  /* Walks through new name       */
+	char	olen;			/* Length of original name	*/
+					/*   including the NULL byte	*/
+	int32	plen;			/* Length of a prefix string	*/
+					/*   *not* including NULL byte	*/
+	int32	rlen;			/* Length of replacment string	*/
+	int32	remain;			/* Bytes in name beyond prefix	*/
+	struct	nmentry	*namptr;	/* Pointer to a table entry	*/
+
+	/* Search name table for first prefix that matches */
+
+	for (i=0; i<nnames; i++) {
+		namptr = &nametab[i];
+		optr = name;		/* Start at beginning of name	*/
+		pptr = namptr->nprefix;	/* Start at beginning of prefix	*/
+		
+		/* Compare prefix to string and count prefix size */
+
+		for (plen=0; *pptr != NULLCH ; plen++) {
+			if (*pptr != *optr) {
+				break;
+			}
+			pptr++;
+			optr++;
+		}
+		if (*pptr != NULLCH) {	/* Prefix does not match */
+			continue;
+		}
+
+		/* Found a match - check that replacement string plus	*/
+		/* bytes remaining at the end of the original name will	*/
+		/* fit into new name buffer.  Ignore null on replacement*/
+		/* string, but keep null on remainder of name.		*/
+
+		olen = namlen(name ,NM_MAXLEN);
+		rlen = namlen(namptr->nreplace,NM_MAXLEN) - 1;
+		remain = olen - plen;
+		if ( (rlen + remain) > NM_MAXLEN) {
+			return (did32)SYSERR;
+		}
+
+		/* Place replacement string followed by remainder of	*/
+		/*   original name (and null) into the new name buffer	*/
+
+		
+                nptr = newname;
+                rptr = namptr->nreplace;
+		for (; rlen>0 ; rlen--) {
+			*nptr++ = *rptr++;
+		}
+		for (; remain>0 ; remain--) {
+			*nptr++ = *optr++;
+		}
+		return namptr->ndevice;
+	}
+	return (did32)SYSERR;
+}
+
+/*------------------------------------------------------------------------
+ *  namcpy  -  Copy a name from one buffer to another, checking length
+ *------------------------------------------------------------------------
+ */
+status	namcpy(
+	 char		*newname,	/* Buffer to hold copy		*/
+	 char		*oldname,	/* Buffer containing name	*/
+    	 int32		buflen		/* Size of buffer for copy	*/
+	)
+{
+        char    *nptr;                  /* Point to new name            */
+        char    *optr;                  /* Point to old name            */
+	int32	cnt;			/* Count of characters copied	*/
+
+        nptr = newname;
+        optr = oldname;
+
+	for (cnt=0; cnt<buflen; cnt++) {
+		if ( (*nptr++ = *optr++) == NULLCH) {
+			return OK;
+		}
+	}
+	return SYSERR;		/* Buffer filled before copy completed	*/
+}
diff --git a/device/nam/namopen.c b/device/nam/namopen.c
new file mode 100644
index 0000000..1a83254
--- /dev/null
+++ b/device/nam/namopen.c
@@ -0,0 +1,29 @@
+/* namopen.c - namopen */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  namopen  -  Open a file or device based on the name
+ *------------------------------------------------------------------------
+ */
+devcall	namopen(
+	  struct dentry *devptr,	/* Entry in device switch table */
+	  char	*name,			/* Name to open			*/
+	  char	*mode			/* Mode argument		*/
+	)
+{
+	char	newname[NM_MAXLEN];	/* Name with prefix replaced	*/
+	did32	newdev;			/* Device ID after mapping	*/
+
+	/* Use namespace to map name to a new name and new descriptor */
+
+	newdev = nammap(name, newname, devptr->dvnum);
+	
+	if (newdev == SYSERR) {
+		return SYSERR;
+	}
+
+	/* Open underlying device and return status */
+
+	return  open(newdev, newname, mode);
+}
diff --git a/device/rds/rdsbufalloc.c b/device/rds/rdsbufalloc.c
new file mode 100644
index 0000000..b872e07
--- /dev/null
+++ b/device/rds/rdsbufalloc.c
@@ -0,0 +1,50 @@
+/* rdsbufalloc.c - rdsbufalloc */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rdsbufalloc  -  Allocate a buffer from the free list or the cache
+ *------------------------------------------------------------------------
+ */
+struct rdbuff *rdsbufalloc (
+	  struct rdscblk *rdptr		/* Ptr to device control block	*/
+	)
+{
+	struct	rdbuff	*bptr;		/* Pointer to a buffer		*/
+	struct	rdbuff	*pptr;		/* Pointer to previous buffer	*/
+	struct	rdbuff	*nptr;		/* Pointer to next buffer	*/
+
+	/* Wait for an available buffer */
+
+	wait(rdptr->rd_availsem);
+
+	/* If free list contains a buffer, extract it */
+
+	bptr = rdptr->rd_free;
+
+	if ( bptr != (struct rdbuff *)NULL ) {
+		rdptr->rd_free = bptr->rd_next;
+		return bptr;
+	}
+
+	/* Extract oldest item in cache that has ref count zero (at	*/
+	/*   least one such entry must exist because the semaphore	*/
+	/*   had a nonzero count)					*/
+
+	bptr = rdptr->rd_ctprev;
+	while (bptr != (struct rdbuff *) &rdptr->rd_chnext) {
+		if (bptr->rd_refcnt <= 0) {
+
+			/* Remove from cache and return to caller */
+
+			pptr = bptr->rd_prev;
+			nptr = bptr->rd_next;
+			pptr->rd_next = nptr;
+			nptr->rd_prev = pptr;
+			return bptr;
+		}
+		bptr = bptr->rd_prev;
+	}
+	panic("Remote disk cannot find an available buffer");
+	return (struct rdbuff *)SYSERR;
+}
diff --git a/device/rds/rdsclose.c b/device/rds/rdsclose.c
new file mode 100644
index 0000000..eeac7e5
--- /dev/null
+++ b/device/rds/rdsclose.c
@@ -0,0 +1,60 @@
+/* rdsclose.c - rdsclose */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rdsclose  -  Close a remote disk device
+ *------------------------------------------------------------------------
+ */
+devcall	rdsclose (
+	  struct dentry	*devptr		/* Entry in device switch table	*/
+	)
+{
+	struct	rdscblk	*rdptr;		/* Ptr to control block entry	*/
+	struct	rdbuff	*bptr;		/* Ptr to buffer on a list	*/
+	struct	rdbuff	*nptr;		/* Ptr to next buff on the list	*/
+	int32	nmoved;			/* Number of buffers moved	*/
+
+	/* Device must be open */
+
+	rdptr = &rdstab[devptr->dvminor];
+	if (rdptr->rd_state != RD_OPEN) {
+		return SYSERR;
+	}
+
+	/* Request queue must be empty */
+
+	if (rdptr->rd_rhnext != (struct rdbuff *)&rdptr->rd_rtnext) {
+		return SYSERR;
+	}
+
+	/* Move all buffers from the cache to the free list */
+
+	bptr = rdptr->rd_chnext;
+	nmoved = 0;
+	while (bptr != (struct rdbuff *)&rdptr->rd_ctnext) {
+		nmoved++;
+
+		/* Unlink buffer from cache */
+
+		nptr = bptr->rd_next;
+		(bptr->rd_prev)->rd_next = nptr;
+		nptr->rd_prev = bptr->rd_prev;
+
+		/* Insert buffer into free list */
+
+		bptr->rd_next = rdptr->rd_free;
+	
+		rdptr->rd_free = bptr;
+		bptr->rd_status = RD_INVALID;
+
+		/* Move to next buffer in the cache */
+
+		bptr = nptr;
+	}
+
+	/* Set the state to indicate the device is closed */
+
+	rdptr->rd_state = RD_FREE;
+	return OK;
+}
diff --git a/device/rds/rdscomm.c b/device/rds/rdscomm.c
new file mode 100644
index 0000000..d6d6484
--- /dev/null
+++ b/device/rds/rdscomm.c
@@ -0,0 +1,124 @@
+/* rdscomm.c - rdscomm */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rdscomm  -  handle communication with a remote disk server (send a
+ *		 request and receive a reply, including sequencing and
+ *		 retries)
+ *------------------------------------------------------------------------
+ */
+status	rdscomm (
+	  struct rd_msg_hdr *msg,	/* Message to send		*/
+	  int32		    mlen,	/* Message length		*/
+	  struct rd_msg_hdr *reply,	/* Buffer for reply		*/
+	  int32		    rlen,	/* Size of reply buffer		*/
+	  struct rdscblk    *rdptr	/* Ptr to device control block	*/
+	)
+{
+	intmask		mask;		/* Saved interrupt mask		*/
+	int32		i;		/* Counts retries		*/
+	int32		retval;		/* Return value			*/
+	int32		seq;		/* Sequence for this exchange	*/
+	uint32		localip;	/* Local IP address		*/
+	int16		rtype;		/* Reply type in host byte order*/
+	bool8		xmit;		/* Should we transmit again?	*/
+	int32		slot;		/* UDP slot			*/
+
+	/* Disable interrupts while testing status */
+
+	mask = disable();
+
+	/* Register the server port, if not registered */
+
+	if ( ! rdptr->rd_registered ) {
+		slot = udp_register(0, rdptr->rd_ser_port,
+						rdptr->rd_loc_port);
+		if(slot == SYSERR) {
+			restore(mask);
+			return SYSERR;
+		}
+		rdptr->rd_udpslot = slot;
+		rdptr->rd_registered = TRUE;
+	}
+
+	/* Get the local IP address */
+
+	if ( NetData.ipvalid == FALSE ) {
+		localip = getlocalip();
+		if((int32)localip == SYSERR) {
+			restore(mask);
+			return SYSERR;
+		}
+	}
+	restore(mask);
+
+	/* Retrieve the saved UDP slot number  */
+
+	slot = rdptr->rd_udpslot;
+
+	/* Assign message next sequence number */
+
+	seq = rdptr->rd_seq++;
+	msg->rd_seq = htonl(seq);
+
+	/* Repeat RD_RETRIES times: send message and receive reply */
+
+	xmit = TRUE;
+	for (i=0; i<RD_RETRIES; i++) {
+	    if (xmit) {
+
+		/* Send a copy of the message */
+
+		retval = udp_sendto(slot, rdptr->rd_ser_ip, rdptr->rd_ser_port,
+					(char *)msg, mlen);
+		if (retval == SYSERR) {
+			kprintf("Cannot send to remote disk server\n\r");
+			return SYSERR;
+		}
+	    } else {
+		xmit = TRUE;
+	    }
+
+	    /* Receive a reply */
+
+	    retval = udp_recv(slot, (char *)reply, rlen,
+						RD_TIMEOUT);
+
+	    if (retval == TIMEOUT) {
+		continue;
+	    } else if (retval == SYSERR) {
+		kprintf("Error reading remote disk reply\n\r");
+		return SYSERR;
+	    }
+
+	    /* Verify that sequence in reply matches request */
+
+		
+	    if (ntohl(reply->rd_seq) < seq) {
+		xmit = FALSE;
+	    } else if (ntohl(reply->rd_seq) != seq) {
+			continue;
+	    }
+
+	    /* Verify the type in the reply matches the request */
+
+	    rtype = ntohs(reply->rd_type);
+	    if (rtype != ( ntohs(msg->rd_type) | RD_MSG_RESPONSE) ) {
+		continue;
+	    }
+
+	    /* Check the status */
+
+	    if (ntohs(reply->rd_status) != 0) {
+		return SYSERR;
+	    }
+
+	    return OK;
+	}
+
+	/* Retries exhausted without success */
+
+	kprintf("Timeout on exchange with remote disk server\n\r");
+	return TIMEOUT;
+}
diff --git a/device/rds/rdscontrol.c b/device/rds/rdscontrol.c
new file mode 100644
index 0000000..7482394
--- /dev/null
+++ b/device/rds/rdscontrol.c
@@ -0,0 +1,131 @@
+/* rdscontrol.c - rdscontrol */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rdscontrol  -  Provide control functions for the remote disk
+ *------------------------------------------------------------------------
+ */
+devcall	rdscontrol (
+	 struct dentry	*devptr,	/* Entry in device switch table	*/
+	 int32	func,			/* The control function to use	*/
+	 int32	arg1,			/* Argument #1			*/
+	 int32	arg2			/* Argument #2			*/
+	)
+{
+	struct	rdscblk	*rdptr;		/* Pointer to control block	*/
+	struct	rdbuff	*bptr;		/* Ptr to buffer that will be	*/
+					/*   placed on the req. queue	*/
+	struct	rdbuff	*pptr;		/* Ptr to "previous" node on	*/
+					/*   a list			*/
+	struct	rd_msg_dreq msg;	/* Buffer for delete request	*/
+	struct	rd_msg_dres resp;	/* Buffer for delete response	*/
+	char	*to, *from;		/* Used during name copy	*/
+	int32	retval;			/* Return value			*/
+
+	/* Verify that device is currently open */
+
+	rdptr = &rdstab[devptr->dvminor];
+	if (rdptr->rd_state != RD_OPEN) {
+		return SYSERR;
+	}
+
+	/* Ensure rdsprocess is runnning */
+
+	if ( ! rdptr->rd_comruns ) {
+		rdptr->rd_comruns = TRUE;
+		resume(rdptr->rd_comproc);
+	}
+
+	switch (func) {
+
+	/* Synchronize writes */
+
+	case RDS_CTL_SYNC:
+
+		/* Allocate a buffer to use for the request list */
+
+		bptr = rdsbufalloc(rdptr);
+		if (bptr == (struct rdbuff *)SYSERR) {
+			return SYSERR;
+		}
+
+		/* Form a sync request */
+
+		bptr->rd_op = RD_OP_SYNC;
+		bptr->rd_refcnt = 1;
+		bptr->rd_blknum = 0;		/* Unused */
+		bptr->rd_status = RD_INVALID;
+		bptr->rd_pid = getpid();
+
+		/* Insert new request into list just before tail */
+
+		pptr = rdptr->rd_rtprev;
+		rdptr->rd_rtprev = bptr;
+		bptr->rd_next = pptr->rd_next;
+		bptr->rd_prev = pptr;
+		pptr->rd_next = bptr;
+
+		/* Prepare to wait until item is processed */
+
+		recvclr();
+
+		/* Signal then semaphore to start communication */
+
+		signal(rdptr->rd_reqsem);
+
+		/* Block to wait for a message */
+
+		bptr = (struct rdbuff *)receive();
+		if (bptr == (struct rdbuff *)SYSERR) {	
+			return SYSERR;
+		}
+		break;
+
+	/* Delete the remote disk (entirely remove it) */
+
+	case RDS_CTL_DEL:
+
+		/* Handcraft a message for the server that requests	*/
+		/*	deleting the disk with the specified ID		*/
+
+		msg.rd_type = htons(RD_MSG_DREQ);/* Request deletion	*/
+		msg.rd_status = htons(0);
+		msg.rd_seq = 0;	/* rdscomm will insert sequence # later	*/
+		to = msg.rd_id;
+		memset(to, NULLCH, RD_IDLEN);	/* Initialize to zeroes	*/
+		from = rdptr->rd_id;
+		while ( (*to++ = *from++) != NULLCH ) {	/* copy ID	*/
+			;
+		}
+
+		/* Send message and receive response */
+
+		retval = rdscomm((struct rd_msg_hdr *)&msg,
+					sizeof(struct rd_msg_dreq),
+			 (struct rd_msg_hdr *)&resp,
+					sizeof(struct rd_msg_dres),
+					rdptr);
+
+		/* Check response */
+
+		if (retval == SYSERR) {
+			return SYSERR;
+		} else if (retval == TIMEOUT) {
+			kprintf("Timeout during remote file delete\n\r");
+			return SYSERR;
+		} else if (ntohs(resp.rd_status) != 0) {
+			return SYSERR;
+		}
+
+		/* Close local device */
+
+		return rdsclose(devptr);
+
+	default:
+		kprintf("rfsControl: function %d not valid\n\r", func);
+		return SYSERR;
+	}
+
+	return OK;
+}
diff --git a/device/rds/rdsinit.c b/device/rds/rdsinit.c
new file mode 100644
index 0000000..8c39f7f
--- /dev/null
+++ b/device/rds/rdsinit.c
@@ -0,0 +1,108 @@
+/* rdsinit.c - rdsinit */
+
+#include <xinu.h>
+
+struct	rdscblk	rdstab[Nrds];
+
+/*------------------------------------------------------------------------
+ *  rdsinit  -  Initialize the remote disk system device
+ *------------------------------------------------------------------------
+ */
+devcall	rdsinit (
+	  struct dentry	*devptr		/* Entry in device switch table	*/
+	)
+{
+	struct	rdscblk	*rdptr;		/* Ptr to device contol block	*/
+	struct	rdbuff	*bptr;		/* Ptr to buffer in memory	*/
+					/*   used to form linked list	*/
+	struct	rdbuff	*pptr;		/* Ptr to previous buff on list	*/
+	struct	rdbuff	*buffend;	/* Last address in buffer memory*/
+	uint32	size;			/* Total size of memory needed	*/
+					/*   buffers			*/
+
+	/* Obtain address of control block */
+
+	rdptr = &rdstab[devptr->dvminor];
+
+	/* Set control block to unused */
+
+	rdptr->rd_state = RD_FREE;
+
+	/* Create the resprocess and leave it suspended.	*/
+	/*	Note: the process cannot be resumed because	*/
+	/*	device initialization occurs before interrupts	*/
+	/*	are enabled.					*/
+
+	rdptr->rd_comproc = create(rdsprocess, RD_STACK, RD_PRIO,
+						"rdsproc", 1, rdptr);
+	if (rdptr->rd_comproc == SYSERR) {
+		panic("Cannot create remote disk process");
+	}
+	rdptr->rd_comruns = FALSE;
+
+	rdptr->rd_id[0] = NULLCH;
+	
+	/* Set initial message sequence number */
+
+	rdptr->rd_seq = 1;
+
+	/* Initialize request queue and cache to empty */
+
+	rdptr->rd_rhnext = (struct rdbuff *) &rdptr->rd_rtnext;
+	rdptr->rd_rhprev = (struct rdbuff *)NULL;
+
+	rdptr->rd_rtnext = (struct rdbuff *)NULL;
+	rdptr->rd_rtprev = (struct rdbuff *) &rdptr->rd_rhnext;
+
+
+	rdptr->rd_chnext = (struct rdbuff *) &rdptr->rd_ctnext;
+	rdptr->rd_chprev = (struct rdbuff *)NULL;
+
+	rdptr->rd_ctnext = (struct rdbuff *)NULL;
+	rdptr->rd_ctprev = (struct rdbuff *) &rdptr->rd_chnext;
+
+	/* Allocate memory for a set of buffers (actually request	*/
+	/*    blocks and link them to form the initial free list	*/
+
+	size = sizeof(struct rdbuff) * RD_BUFFS;
+
+	bptr = (struct rdbuff *)getmem(size);
+	rdptr->rd_free = bptr;
+
+	if ((int32)bptr == SYSERR) {
+		panic("Cannot allocate memory for remote disk buffers");
+	}
+
+	pptr = (struct rdbuff *) NULL;	/* To avoid a compiler warning	*/
+	buffend = (struct rdbuff *) ((char *)bptr + size);
+	while (bptr < buffend) {	/* walk through memory */
+		pptr = bptr;
+		bptr = (struct rdbuff *)
+				(sizeof(struct rdbuff)+ (char *)bptr);
+		pptr->rd_status = RD_INVALID;	/* Buffer is empty	*/
+		pptr->rd_next = bptr;		/* Point to next buffer */
+	}
+	pptr->rd_next = (struct rdbuff *) NULL;	/* Last buffer on list	*/
+
+	/* Create the request list and available buffer semaphores */
+
+	rdptr->rd_availsem = semcreate(RD_BUFFS);
+	rdptr->rd_reqsem   = semcreate(0);
+
+	/* Set the server IP address, server port, and local port */
+
+	if ( dot2ip(RD_SERVER_IP, &rdptr->rd_ser_ip) == SYSERR ) {
+		panic("invalid IP address for remote disk server");
+	}
+
+	/* Set the port numbers */
+
+	rdptr->rd_ser_port = RD_SERVER_PORT;
+	rdptr->rd_loc_port = RD_LOC_PORT + devptr->dvminor;
+
+	/* Specify that the server port is not yet registered */
+
+	rdptr->rd_registered = FALSE;
+
+	return OK;
+}
diff --git a/device/rds/rdsopen.c b/device/rds/rdsopen.c
new file mode 100644
index 0000000..67ee955
--- /dev/null
+++ b/device/rds/rdsopen.c
@@ -0,0 +1,93 @@
+/* rdsopen.c - rdsopen */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rdsopen  -  Open a remote disk device and specify an ID to use
+ *------------------------------------------------------------------------
+ */
+
+devcall	rdsopen (
+	 struct	dentry	*devptr,	/* Entry in device switch table	*/
+	 char	*diskid,		/* Disk ID to use		*/
+	 char	*mode			/* Unused for a remote disk	*/
+	)
+{
+	struct	rdscblk	*rdptr;		/* Ptr to control block entry	*/
+	struct	rd_msg_oreq msg;	/* Message to be sent		*/
+	struct	rd_msg_ores resp;	/* Buffer to hold response	*/
+	int32	retval;			/* Return value from rdscomm	*/
+	int32	len;			/* Counts chars in diskid	*/
+	char	*idto;			/* Ptr to ID string copy	*/
+	char	*idfrom;		/* Pointer into ID string	*/
+
+	rdptr = &rdstab[devptr->dvminor];
+
+	/* Reject if device is already open */
+
+	if (rdptr->rd_state != RD_FREE) {
+		return SYSERR;
+	}
+	rdptr->rd_state = RD_PEND;
+
+	/* Copy disk ID into free table slot */
+
+	idto = rdptr->rd_id;
+	idfrom = diskid;
+	len = 0;
+	while ( (*idto++ = *idfrom++) != NULLCH) {
+		len++;
+		if (len >= RD_IDLEN) {	/* ID string is too long */
+			return SYSERR;
+		}
+	}
+
+	/* Verify that name is non-null */
+
+	if (len == 0) {
+		return SYSERR;
+	}
+
+	/* Hand-craft an open request message to be sent to the server */
+
+	msg.rd_type = htons(RD_MSG_OREQ);/* Request an open		*/
+	msg.rd_status = htons(0);
+	msg.rd_seq = 0;			/* Rdscomm fills in an entry	*/
+	idto = msg.rd_id;
+	memset(idto, NULLCH, RD_IDLEN);/* initialize ID to zero bytes	*/
+
+	idfrom = diskid;
+	while ( (*idto++ = *idfrom++) != NULLCH ) { /* Copy ID to req.	*/
+		;
+	}
+
+	/* Send message and receive response */
+
+	retval = rdscomm((struct rd_msg_hdr *)&msg,
+					sizeof(struct rd_msg_oreq),
+			 (struct rd_msg_hdr *)&resp,
+					sizeof(struct rd_msg_ores),
+				rdptr );
+
+	/* Check response */
+
+	if (retval == SYSERR) {
+		rdptr->rd_state = RD_FREE;
+		return SYSERR;
+	} else if (retval == TIMEOUT) {
+		kprintf("Timeout during remote file open\n\r");
+		rdptr->rd_state = RD_FREE;
+		return SYSERR;
+	} else if (ntohs(resp.rd_status) != 0) {
+		rdptr->rd_state = RD_FREE;
+		return SYSERR;
+	}
+
+	/* Change state of device to indicate currently open */
+
+	rdptr->rd_state = RD_OPEN;
+
+	/* Return device descriptor */
+
+	return devptr->dvnum;
+}
diff --git a/device/rds/rdsprocess.c b/device/rds/rdsprocess.c
new file mode 100644
index 0000000..a01ebab
--- /dev/null
+++ b/device/rds/rdsprocess.c
@@ -0,0 +1,212 @@
+/* rdsprocess.c - rdsprocess */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rdsprocess  -  High-priority background process that repeatedly
+ *		  extracts an item from the request queue, sends the
+ *		  request to the remote disk server, and handles the
+ *		  response, including caching responses blocks
+ *------------------------------------------------------------------------
+ */
+void	rdsprocess (
+	  struct rdscblk    *rdptr	/* Ptr to device control block	*/
+	)
+{
+	struct	rd_msg_wreq msg;	/* Message to be sent		*/
+					/*   (includes data area)	*/
+	struct	rd_msg_rres resp;	/* Buffer to hold response	*/
+					/*   (includes data area)	*/
+	int32	retval;			/* Return value from rdscomm	*/
+	char	*idto;			/* Ptr to ID string copy	*/
+	char	*idfrom;		/* Ptr into ID string		*/
+	struct	rdbuff	*bptr;		/* Ptr to buffer at the head of	*/
+					/*   the request queue		*/
+	struct	rdbuff	*nptr;		/* Ptr to next buffer on the	*/
+					/*   request queue		*/
+	struct	rdbuff	*pptr;		/* Ptr to previous buffer	*/
+	struct	rdbuff	*qptr;		/* Ptr that runs along the	*/
+					/*   request queue		*/
+	int32	i;			/* Loop index			*/
+
+	while (TRUE) {			/* Do forever */
+
+	    /* Wait until the request queue contains a node */
+	    wait(rdptr->rd_reqsem);
+	    bptr = rdptr->rd_rhnext;
+
+	    /* Use operation in request to determine action */
+
+	   switch (bptr->rd_op) {
+
+	   case RD_OP_READ:
+
+		/* Build a read request message for the server */
+
+		msg.rd_type = htons(RD_MSG_RREQ);	/* Read request	*/
+		msg.rd_status = htons(0);
+		msg.rd_seq = 0;		/* Rdscomm fills in an entry	*/
+		idto = msg.rd_id;
+		memset(idto, NULLCH, RD_IDLEN);/* Initialize ID to zero	*/
+		idfrom = rdptr->rd_id;
+		while ( (*idto++ = *idfrom++) != NULLCH ) { /* Copy ID	*/
+			;
+		}
+
+		/* Send the message and receive a response */
+
+		retval = rdscomm((struct rd_msg_hdr *)&msg,
+					sizeof(struct rd_msg_rreq),
+				 (struct rd_msg_hdr *)&resp,
+					sizeof(struct rd_msg_rres),
+				  rdptr );
+
+		/* Check response */
+
+		if ( (retval == SYSERR) || (retval == TIMEOUT) ||
+				(ntohs(resp.rd_status) != 0) ) {
+			panic("Failed to contact remote disk server");
+		}
+
+		/* Copy data from the reply into the buffer */
+
+		for (i=0; i<RD_BLKSIZ; i++) {
+			bptr->rd_block[i] = resp.rd_data[i];
+		}
+
+		/* Unlink buffer from the request queue */
+
+		nptr = bptr->rd_next;
+		pptr = bptr->rd_prev;
+		nptr->rd_prev = bptr->rd_prev;
+		pptr->rd_next = bptr->rd_next;
+
+		/* Insert buffer in the cache */
+
+		pptr = (struct rdbuff *) &rdptr->rd_chnext;
+		nptr = pptr->rd_next;
+		bptr->rd_next = nptr;
+		bptr->rd_prev = pptr;
+		pptr->rd_next = bptr;
+		nptr->rd_prev = bptr;
+
+		/* Initialize reference count */
+
+		bptr->rd_refcnt = 1;
+
+		/* Signal the available semaphore */
+
+		signal(rdptr->rd_availsem);
+
+		/* Send a message to waiting process */
+
+		send(bptr->rd_pid, (uint32)bptr);
+
+		/* If other processes are waiting to read the  */
+		/*   block, notify them and remove the request */
+
+		qptr = rdptr->rd_rhnext;
+		while (qptr != (struct rdbuff *)&rdptr->rd_rtnext) {
+			if (qptr->rd_blknum == bptr->rd_blknum) {
+				bptr->rd_refcnt++;
+				send(qptr->rd_pid,(uint32)bptr);
+
+				/* Unlink request from queue	*/
+
+				pptr = qptr->rd_prev;
+				nptr = qptr->rd_next;
+				pptr->rd_next = bptr->rd_next;
+				nptr->rd_prev = bptr->rd_prev;
+
+				/* Move buffer to the free list	*/
+
+				qptr->rd_next = rdptr->rd_free;
+				rdptr->rd_free = qptr;
+				signal(rdptr->rd_availsem);
+				break;
+			}
+			qptr = qptr->rd_next;
+		}
+		break;
+
+	    case RD_OP_WRITE:
+
+		/* Build a write request message for the server */
+
+		msg.rd_type = htons(RD_MSG_WREQ);	/* Write request*/
+		msg.rd_blk = bptr->rd_blknum;
+		msg.rd_status = htons(0);
+		msg.rd_seq = 0;		/* Rdscomb fills in an entry	*/
+		idto = msg.rd_id;
+		memset(idto, NULLCH, RD_IDLEN);/* Initialize ID to zero	*/
+		idfrom = rdptr->rd_id;
+		while ( (*idto++ = *idfrom++) != NULLCH ) { /* Copy ID	*/
+			;
+		}
+		for (i=0; i<RD_BLKSIZ; i++) {
+			msg.rd_data[i] = bptr->rd_block[i];
+		}
+
+		/* Unlink buffer from request queue */
+
+		nptr = bptr->rd_next;
+		pptr = bptr->rd_prev;
+		pptr->rd_next = nptr;
+		nptr->rd_prev = pptr;
+
+		/* Insert buffer in the cache */
+
+		pptr = (struct rdbuff *) &rdptr->rd_chnext;
+		nptr = pptr->rd_next;
+		bptr->rd_next = nptr;
+		bptr->rd_prev = pptr;
+		pptr->rd_next = bptr;
+		nptr->rd_prev = bptr;
+
+		/* Declare that buffer is eligible for reuse */
+
+		bptr->rd_refcnt = 0;
+		signal(rdptr->rd_availsem);
+
+		/* Send the message and receive a response */
+
+		retval = rdscomm((struct rd_msg_hdr *)&msg,
+					sizeof(struct rd_msg_wreq),
+				 (struct rd_msg_hdr *)&resp,
+					sizeof(struct rd_msg_wres),
+				  rdptr );
+
+		/* Check response */
+
+		if ( (retval == SYSERR) || (retval == TIMEOUT) ||
+				(ntohs(resp.rd_status) != 0) ) {
+			panic("failed to contact remote disk server");
+		}
+		break;
+
+	    case RD_OP_SYNC:
+
+		/* Send a message to the waiting process */
+
+		send(bptr->rd_pid, OK);
+
+		/* Unlink buffer from the request queue */
+
+		nptr = bptr->rd_next;
+		pptr = bptr->rd_prev;
+		nptr->rd_prev = bptr->rd_prev;
+		pptr->rd_next = bptr->rd_next;
+
+		/* Insert buffer into the free list */
+
+		bptr->rd_next = rdptr->rd_free;
+		rdptr->rd_free = bptr;
+		signal(rdptr->rd_availsem);
+		break;
+	   }
+	}
+}
+
+
+
+
diff --git a/device/rds/rdsread.c b/device/rds/rdsread.c
new file mode 100644
index 0000000..be99f01
--- /dev/null
+++ b/device/rds/rdsread.c
@@ -0,0 +1,130 @@
+/* rdsread.c - rdsread */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rdsread  -  Read a block from a remote disk
+ *------------------------------------------------------------------------
+ */
+devcall	rdsread (
+	  struct dentry	*devptr,	/* Entry in device switch table	*/
+	  char	*buff,			/* Buffer to hold disk block	*/
+	  int32	blk			/* Block number of block to read*/
+	)
+{
+	struct	rdscblk	*rdptr;		/* Pointer to control block	*/
+	struct	rdbuff	*bptr;		/* Pointer to buffer possibly	*/
+					/*   in the request list	*/
+	struct	rdbuff	*nptr;		/* Pointer to "next" node on a	*/
+					/*   list			*/
+	struct	rdbuff	*pptr;		/* Pointer to "previous" node	*/
+					/*   on a list			*/
+	struct	rdbuff	*cptr;		/* Pointer that walks the cache	*/
+
+	/* If device not currently in use, report an error */
+
+	rdptr = &rdstab[devptr->dvminor];
+	if (rdptr->rd_state != RD_OPEN) {
+		return SYSERR;
+	}
+
+	/* Ensure rdsprocess is runnning */
+
+	if ( ! rdptr->rd_comruns ) {
+		rdptr->rd_comruns = TRUE;
+		resume(rdptr->rd_comproc);
+	}
+
+	/* Search the cache for specified block */
+
+	bptr = rdptr->rd_chnext;
+	while (bptr != (struct rdbuff *)&rdptr->rd_ctnext) {
+		if (bptr->rd_blknum == blk) {
+			if (bptr->rd_status == RD_INVALID) {
+				break;
+			}
+			memcpy(buff, bptr->rd_block, RD_BLKSIZ);
+			return OK;
+		}
+		bptr = bptr->rd_next;
+	}
+
+	/* Search the request list for most recent occurrence of block */
+
+	bptr = rdptr->rd_rtprev;  /* Start at tail of list */
+
+	while (bptr != (struct rdbuff *)&rdptr->rd_rhnext) {
+	    if (bptr->rd_blknum == blk)  {
+
+		/* If most recent request for block is write, copy data */
+
+		if (bptr->rd_op == RD_OP_WRITE) {
+			memcpy(buff, bptr->rd_block, RD_BLKSIZ);
+			return OK;
+		}
+		break;
+	    }
+	    bptr = bptr->rd_prev;
+	}
+
+	/* Allocate a buffer and add read request to tail of req. queue */
+
+	bptr = rdsbufalloc(rdptr);	
+	bptr->rd_op = RD_OP_READ;
+	bptr->rd_refcnt = 1;
+	bptr->rd_blknum = blk;
+	bptr->rd_status = RD_INVALID;
+	bptr->rd_pid = getpid();
+
+	/* Insert new request into list just before tail */
+
+	pptr = rdptr->rd_rtprev;
+	rdptr->rd_rtprev = bptr;
+	bptr->rd_next = pptr->rd_next;
+	bptr->rd_prev = pptr;
+	pptr->rd_next = bptr;
+
+	/* Prepare to receive message when read completes */
+
+	recvclr();
+
+	/* Signal the semaphore to start communication */
+
+	signal(rdptr->rd_reqsem);
+
+	/* Block to wait for a message */
+
+	bptr = (struct rdbuff *)receive();
+	if (bptr == (struct rdbuff *)SYSERR) {	
+		return SYSERR;
+	}
+	memcpy(buff, bptr->rd_block, RD_BLKSIZ);
+	bptr->rd_refcnt--;
+	if (bptr->rd_refcnt <= 0) {
+
+		/* Look for previous item in cache with the same block	*/
+		/*    number to see if this item was only being kept	*/
+		/*    until pending read completed			*/
+				
+		cptr = rdptr->rd_chnext;
+		while (cptr != bptr) {
+			if (cptr->rd_blknum == blk) {
+
+				/* Unlink from cache */
+
+				pptr = bptr->rd_prev;
+				nptr = bptr->rd_next;
+				pptr->rd_next = nptr;
+				nptr->rd_prev = pptr;
+
+				/* Add to the free list */
+
+				bptr->rd_next = rdptr->rd_free;
+				rdptr->rd_free = bptr;
+				break;
+			}
+			cptr = cptr->rd_next;
+		}
+	}
+	return OK;
+}
diff --git a/device/rds/rdswrite.c b/device/rds/rdswrite.c
new file mode 100644
index 0000000..e9eed2a
--- /dev/null
+++ b/device/rds/rdswrite.c
@@ -0,0 +1,97 @@
+/* rdswrite.c - rdswrite */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rdswrite  -  Write a block to a remote disk
+ *------------------------------------------------------------------------
+ */
+devcall	rdswrite (
+	  struct dentry	*devptr,	/* Entry in device switch table	*/
+	  char	*buff,			/* Buffer that holds a disk blk	*/
+	  int32	blk			/* Block number to write	*/
+	)
+{
+	struct	rdscblk	*rdptr;		/* Pointer to control block	*/
+	struct	rdbuff	*bptr;		/* Pointer to buffer on a list	*/
+	struct	rdbuff	*pptr;		/* Ptr to previous buff on list	*/
+	struct	rdbuff	*nptr;		/* Ptr to next buffer on list	*/
+	bool8	found;			/* Was buff found during search?*/
+
+	/* If device not currently in use, report an error */
+
+	rdptr = &rdstab[devptr->dvminor];
+	if (rdptr->rd_state != RD_OPEN) {
+		return SYSERR;
+	}
+
+	/* Ensure rdsprocess is runnning */
+
+	if ( ! rdptr->rd_comruns ) {
+		rdptr->rd_comruns = TRUE;
+		resume(rdptr->rd_comproc);
+	}
+
+	/* If request queue already contains a write request */
+	/*    for the block, replace the contents	     */
+
+	bptr = rdptr->rd_rhnext;
+	while (bptr != (struct rdbuff *)&rdptr->rd_rtnext) {
+		if ( (bptr->rd_blknum == blk) &&
+			(bptr->rd_op == RD_OP_WRITE) ) {
+			memcpy(bptr->rd_block, buff, RD_BLKSIZ);
+			return OK;
+		}
+		bptr = bptr->rd_next;
+	}
+
+	/* Search cache for cached copy of block */
+
+	bptr = rdptr->rd_chnext;
+	found = FALSE;
+	while (bptr != (struct rdbuff *)&rdptr->rd_ctnext) {
+		if (bptr->rd_blknum == blk) {
+			if (bptr->rd_refcnt <= 0) {
+				pptr = bptr->rd_prev;
+				nptr = bptr->rd_next;
+
+				/* Unlink node from cache list and reset*/
+				/*   the available semaphore accordingly*/
+
+				pptr->rd_next = bptr->rd_next;
+				nptr->rd_prev = bptr->rd_prev;
+				semreset(rdptr->rd_availsem,
+					semcount(rdptr->rd_availsem) - 1);
+				found = TRUE;
+			}
+			break;
+		}
+		bptr = bptr->rd_next;
+	}
+
+	if ( !found ) {
+		bptr = rdsbufalloc(rdptr);
+	}
+
+	/* Create a write request */
+
+	memcpy(bptr->rd_block, buff, RD_BLKSIZ);
+	bptr->rd_op = RD_OP_WRITE;
+	bptr->rd_refcnt = 0;
+	bptr->rd_blknum = blk;
+	bptr->rd_status = RD_VALID;
+	bptr->rd_pid = getpid();
+
+	/* Insert new request into list just before tail */
+
+	pptr = rdptr->rd_rtprev;
+	rdptr->rd_rtprev = bptr;
+	bptr->rd_next = pptr->rd_next;
+	bptr->rd_prev = pptr;
+	pptr->rd_next = bptr;
+
+	/* Signal semaphore to start communication process */
+
+	signal(rdptr->rd_reqsem);
+	return OK;
+}
diff --git a/device/rfs/rflclose.c b/device/rfs/rflclose.c
new file mode 100644
index 0000000..f1f0d87
--- /dev/null
+++ b/device/rfs/rflclose.c
@@ -0,0 +1,32 @@
+/* rflclose.c - rflclose */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rflclose  -  Close a remote file device
+ *------------------------------------------------------------------------
+ */
+devcall	rflclose (
+	  struct dentry	*devptr		/* Entry in device switch table	*/
+	)
+{
+	struct	rflcblk	*rfptr;		/* Pointer to control block	*/
+
+	/* Wait for exclusive access */
+
+	wait(Rf_data.rf_mutex);
+
+	/* Verify remote file device is open */
+
+	rfptr = &rfltab[devptr->dvminor];
+	if (rfptr->rfstate == RF_FREE) {
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	}
+
+	/* Mark device closed */
+
+	rfptr->rfstate = RF_FREE;
+	signal(Rf_data.rf_mutex);
+	return OK;
+}
diff --git a/device/rfs/rflgetc.c b/device/rfs/rflgetc.c
new file mode 100644
index 0000000..3db46c1
--- /dev/null
+++ b/device/rfs/rflgetc.c
@@ -0,0 +1,23 @@
+/* rflgetc.c - rflgetc */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  rflgetc  -  Read one character from a remote file
+ *------------------------------------------------------------------------
+ */
+devcall	rflgetc(
+	struct	dentry	*devptr		/* Entry in device switch table	*/
+	)
+{
+	char	ch;			/* Character to read		*/
+	int32	retval;			/* Return value			*/
+
+	retval = rflread(devptr, &ch, 1);
+
+	if (retval != 1) {
+		return SYSERR;
+	}
+
+	return (devcall)ch;
+}
diff --git a/device/rfs/rflinit.c b/device/rfs/rflinit.c
new file mode 100644
index 0000000..79e43c8
--- /dev/null
+++ b/device/rfs/rflinit.c
@@ -0,0 +1,29 @@
+/* rflinit.c - rflinit */
+
+#include <xinu.h>
+
+struct	rflcblk	rfltab[Nrfl];		/* Remote file control blocks	*/
+
+/*------------------------------------------------------------------------
+ *  rflinit  -  Initialize a remote file device
+ *------------------------------------------------------------------------
+ */
+devcall	rflinit(
+	  struct dentry	*devptr		/* Entry in device switch table	*/
+	)
+{
+	struct	rflcblk	*rflptr;	/* Ptr. to control block entry	*/
+	int32	i;			/* Walks through name arrary	*/
+
+	rflptr = &rfltab[ devptr->dvminor ];
+
+	/* Initialize entry to unused */
+
+	rflptr->rfstate = RF_FREE;
+	rflptr->rfdev = devptr->dvnum;
+	for (i=0; i<RF_NAMLEN; i++) {
+		rflptr->rfname[i] = NULLCH;
+	}
+	rflptr->rfpos = rflptr->rfmode = 0;
+	return OK;
+}
diff --git a/device/rfs/rflputc.c b/device/rfs/rflputc.c
new file mode 100644
index 0000000..d7e06e3
--- /dev/null
+++ b/device/rfs/rflputc.c
@@ -0,0 +1,19 @@
+/* rflputc.c - rflputc */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  rflputc  -  Write one character to a remote file
+ *------------------------------------------------------------------------
+ */
+devcall	rflputc(
+	struct	dentry	*devptr,	/* Entry in device switch table	*/
+	char	ch			/* Character to write		*/
+	)
+{
+	if (rflwrite(devptr, &ch, 1) != 1) {
+		return SYSERR;
+	}
+
+	return OK;
+}
diff --git a/device/rfs/rflread.c b/device/rfs/rflread.c
new file mode 100644
index 0000000..5d8979b
--- /dev/null
+++ b/device/rfs/rflread.c
@@ -0,0 +1,100 @@
+/* rflread.c - rflread */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rflread  -  Read data from a remote file
+ *------------------------------------------------------------------------
+ */
+devcall	rflread (
+	  struct dentry	*devptr,	/* Entry in device switch table	*/
+	  char	*buff,			/* Buffer of bytes		*/
+	  int32	count 			/* Count of bytes to read	*/
+	)
+{
+	struct	rflcblk	*rfptr;		/* Pointer to control block	*/
+	int32	retval;			/* Return value			*/
+	struct	rf_msg_rreq  msg;	/* Request message to send	*/
+	struct	rf_msg_rres resp;	/* Buffer for response		*/
+	int32	i;			/* Counts bytes copied		*/
+	char	*from, *to;		/* Used during name copy	*/
+	int32	len;			/* Length of name		*/
+
+	/* Wait for exclusive access */
+
+	wait(Rf_data.rf_mutex);
+
+	/* Verify count is legitimate */
+
+	if ( (count <= 0) || (count > RF_DATALEN) ) {
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	}
+
+	/* Verify pseudo-device is in use */
+
+	rfptr = &rfltab[devptr->dvminor];
+
+	/* If device not currently in use, report an error */
+
+	if (rfptr->rfstate == RF_FREE) {
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	}
+
+	/* Verify pseudo-device allows reading */
+
+	if ((rfptr->rfmode & RF_MODE_R) == 0) {
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	}
+
+	/* Form read request */
+
+	msg.rf_type = htons(RF_MSG_RREQ);
+	msg.rf_status = htons(0);
+	msg.rf_seq = 0;			/* Rfscomm will set sequence	*/
+	from = rfptr->rfname;
+	to = msg.rf_name;
+	memset(to, NULLCH, RF_NAMLEN);	/* Start name as all zero bytes	*/
+	len = 0;
+	while ( (*to++ = *from++) ) {	/* Copy name to request		*/
+		if (++len >= RF_NAMLEN) {
+			signal(Rf_data.rf_mutex);
+			return SYSERR;
+		}
+	}
+	msg.rf_pos = htonl(rfptr->rfpos);/* Set file position		*/
+	msg.rf_len = htonl(count);	/* Set count of bytes to read	*/
+
+	/* Send message and receive response */
+
+	retval = rfscomm((struct rf_msg_hdr *)&msg,
+					sizeof(struct rf_msg_rreq),
+			 (struct rf_msg_hdr *)&resp,
+					sizeof(struct rf_msg_rres) );
+
+	/* Check response */
+
+	if (retval == SYSERR) {
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	} else if (retval == TIMEOUT) {
+		kprintf("Timeout during remote file read\n");
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	} else if (ntohs(resp.rf_status) != 0) {
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	}
+
+	/* Copy data to application buffer and update file position */
+
+	for (i=0; i<ntohl(resp.rf_len); i++) {
+		*buff++ = resp.rf_data[i];
+	}
+	rfptr->rfpos += ntohl(resp.rf_len);
+
+	signal(Rf_data.rf_mutex);
+	return ntohl(resp.rf_len);
+}
diff --git a/device/rfs/rflseek.c b/device/rfs/rflseek.c
new file mode 100644
index 0000000..4a84788
--- /dev/null
+++ b/device/rfs/rflseek.c
@@ -0,0 +1,33 @@
+/* rflseek.c - rflseek */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rflseek  -  Change the current position in an open file
+ *------------------------------------------------------------------------
+ */
+devcall	rflseek (
+	  struct dentry	*devptr,	/* Entry in device switch table	*/
+	  uint32 pos			/* New file position		*/
+	)
+{
+	struct	rflcblk	*rfptr;		/* Pointer to control block	*/
+
+	/* Wait for exclusive access */
+
+	wait(Rf_data.rf_mutex);
+
+	/* Verify remote file device is open */
+
+	rfptr = &rfltab[devptr->dvminor];
+	if (rfptr->rfstate == RF_FREE) {
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	}
+
+	/* Set the new position */
+
+	rfptr->rfpos = pos;
+	signal(Rf_data.rf_mutex);
+	return OK;
+}
diff --git a/device/rfs/rflwrite.c b/device/rfs/rflwrite.c
new file mode 100644
index 0000000..ec3c2b9
--- /dev/null
+++ b/device/rfs/rflwrite.c
@@ -0,0 +1,97 @@
+/* rflwrite.c - rflwrite */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rflwrite  -  Write data to a remote file
+ *------------------------------------------------------------------------
+ */
+devcall	rflwrite (
+	  struct dentry	*devptr,	/* Entry in device switch table	*/
+	  char	*buff,			/* Buffer of bytes		*/
+	  int32	count 			/* Count of bytes to write	*/
+	)
+{
+	struct	rflcblk	*rfptr;		/* Pointer to control block	*/
+	int32	retval;			/* Return value			*/
+	struct	rf_msg_wreq  msg;	/* Request message to send	*/
+	struct	rf_msg_wres resp;	/* Buffer for response		*/
+	char	*from, *to;		/* Used to copy name		*/
+	int	i;			/* Counts bytes copied into req	*/
+	int32	len;			/* Length of name		*/
+
+	/* Wait for exclusive access */
+
+	wait(Rf_data.rf_mutex);
+
+	/* Verify count is legitimate */
+
+	if ( (count <= 0) || (count > RF_DATALEN) ) {
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	}
+
+	/* Verify pseudo-device is in use and mode allows writing */
+
+	rfptr = &rfltab[devptr->dvminor];
+	if ( (rfptr->rfstate == RF_FREE) ||
+	     ! (rfptr->rfmode & RF_MODE_W) ) {
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	}
+
+	/* Form write request */
+
+	msg.rf_type = htons(RF_MSG_WREQ);
+	msg.rf_status = htons(0);
+	msg.rf_seq = 0;			/* Rfscomm will set sequence	*/
+	from = rfptr->rfname;
+	to = msg.rf_name;
+	memset(to, NULLCH, RF_NAMLEN);	/* Start name as all zero bytes	*/
+	len = 0;
+	while ( (*to++ = *from++) ) {	/* Copy name to request		*/
+		if (++len >= RF_NAMLEN) {
+			signal(Rf_data.rf_mutex);
+			return SYSERR;
+		}
+	}
+	while ( (*to++ = *from++) ) {	/* Copy name into request	*/
+		;
+	}
+	msg.rf_pos = htonl(rfptr->rfpos);/* Set file position		*/
+	msg.rf_len = htonl(count);	/* Set count of bytes to write	*/
+	for (i=0; i<count; i++) {	/* Copy data into message	*/
+		msg.rf_data[i] = *buff++;
+	}
+	while (i < RF_DATALEN) {
+		msg.rf_data[i++] = NULLCH;
+	}
+
+	/* Send message and receive response */
+
+	retval = rfscomm((struct rf_msg_hdr *)&msg,
+					sizeof(struct rf_msg_wreq),
+			 (struct rf_msg_hdr *)&resp,
+				sizeof(struct rf_msg_wres) );
+
+	/* Check response */
+
+	if (retval == SYSERR) {
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	} else if (retval == TIMEOUT) {
+		kprintf("Timeout during remote file read\n");
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	} else if (ntohs(resp.rf_status) != 0) {
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	}
+
+	/* Report results to caller */
+
+	rfptr->rfpos += ntohl(resp.rf_len);
+
+	signal(Rf_data.rf_mutex);
+	return ntohl(resp.rf_len);
+}
diff --git a/device/rfs/rfscomm.c b/device/rfs/rfscomm.c
new file mode 100644
index 0000000..cea00b8
--- /dev/null
+++ b/device/rfs/rfscomm.c
@@ -0,0 +1,85 @@
+/* rfscomm.c - rfscomm */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rfscomm  -  Handle communication with RFS server (send request and
+ *		receive a reply, including sequencing and retries)
+ *------------------------------------------------------------------------
+ */
+int32	rfscomm (
+	 struct	rf_msg_hdr *msg,	/* Message to send		*/
+	 int32	mlen,			/* Message length		*/
+	 struct	rf_msg_hdr *reply,	/* Buffer for reply		*/
+	 int32	rlen			/* Size of reply buffer		*/
+	)
+{
+	int32	i;			/* Counts retries		*/
+	int32	retval;			/* Return value			*/
+	int32	seq;			/* Sequence for this exchange	*/
+	int16	rtype;			/* Reply type in host byte order*/
+	int32	slot;			/* UDP slot			*/
+
+	/* For the first time after reboot, register the server port */
+
+	if ( ! Rf_data.rf_registered ) {
+		if ( (slot = udp_register(Rf_data.rf_ser_ip,
+				Rf_data.rf_ser_port,
+				Rf_data.rf_loc_port)) == SYSERR) {
+			return SYSERR;
+		}
+		Rf_data.rf_udp_slot = slot;
+		Rf_data.rf_registered = TRUE;
+	}
+
+	/* Assign message next sequence number */
+
+	seq = Rf_data.rf_seq++;
+	msg->rf_seq = htonl(seq);
+
+	/* Repeat RF_RETRIES times: send message and receive reply */
+
+	for (i=0; i<RF_RETRIES; i++) {
+
+		/* Send a copy of the message */
+
+		retval = udp_send(Rf_data.rf_udp_slot, (char *)msg,
+			mlen);
+		if (retval == SYSERR) {
+			kprintf("Cannot send to remote file server\n");
+			return SYSERR;
+		}
+
+		/* Receive a reply */
+
+		retval = udp_recv(Rf_data.rf_udp_slot, (char *)reply,
+			rlen, RF_TIMEOUT);
+
+		if (retval == TIMEOUT) {
+			continue;
+		} else if (retval == SYSERR) {
+			kprintf("Error reading remote file reply\n");
+			return SYSERR;
+		}
+
+		/* Verify that sequence in reply matches request */
+
+		if (ntohl(reply->rf_seq) != seq) {
+			continue;
+		}
+
+		/* Verify the type in the reply matches the request */
+
+		rtype = ntohs(reply->rf_type);
+		if (rtype != ( ntohs(msg->rf_type) | RF_MSG_RESPONSE) ) {
+			continue;
+		}
+
+		return retval;		/* Return length to caller */
+	}
+
+	/* Retries exhausted without success */
+
+	kprintf("Timeout on exchange with remote file server\n");
+	return TIMEOUT;
+}
diff --git a/device/rfs/rfscontrol.c b/device/rfs/rfscontrol.c
new file mode 100644
index 0000000..f10cbb9
--- /dev/null
+++ b/device/rfs/rfscontrol.c
@@ -0,0 +1,114 @@
+/* rfscontrol.c - rfscontrol */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rfscontrol  -  Provide control functions for the remote file system
+ *------------------------------------------------------------------------
+ */
+devcall	rfscontrol (
+	 struct dentry	*devptr,	/* Entry in device switch table	*/
+	 int32	func,			/* A control function		*/
+	 int32	arg1,			/* Argument #1			*/
+	 int32	arg2			/* Argument #2			*/
+	)
+{
+	int32	len;			/* Length of name		*/
+	struct	rf_msg_sreq msg;	/* Buffer for size request	*/
+	struct	rf_msg_sres resp;	/* Buffer for size response	*/
+	char	*to, *from;		/* Used during name copy	*/
+	int32	retval;			/* Return value			*/
+
+	/* Wait for exclusive access */
+
+	wait(Rf_data.rf_mutex);
+
+	/* Check length of name (copy during the check even though the	*/
+	/*	copy is only used for a size request)			*/
+
+	from = (char *)arg1;
+	to = msg.rf_name;
+	len = 0;
+	memset(to, NULLCH, RF_NAMLEN);	/* Start name as all zeroes	*/
+	while ( (*to++ = *from++) ) {	/* Copy name to message		*/
+		len++;
+		if (len >= (RF_NAMLEN - 1) ) {
+			signal(Rf_data.rf_mutex);
+			return SYSERR;
+		}
+	}
+
+	switch (func) {
+
+	/* Delete a file */
+
+	case RFS_CTL_DEL:
+		if (rfsndmsg(RF_MSG_DREQ, (char *)arg1) == SYSERR) {
+			signal(Rf_data.rf_mutex);
+			return SYSERR;
+		}
+		break;
+
+	/* Truncate a file */
+
+	case RFS_CTL_TRUNC:
+		if (rfsndmsg(RF_MSG_TREQ, (char *)arg1) == SYSERR) {
+			signal(Rf_data.rf_mutex);
+			return SYSERR;
+		}
+		break;
+
+
+
+	/* Make a directory */
+
+	case RFS_CTL_MKDIR:
+		if (rfsndmsg(RF_MSG_MREQ, (char *)arg1) == SYSERR) {
+			signal(Rf_data.rf_mutex);
+			return SYSERR;
+		}
+		break;
+
+	/* Remove a directory */
+
+	case RFS_CTL_RMDIR:
+		if (rfsndmsg(RF_MSG_XREQ, (char *)arg1) == SYSERR) {
+			signal(Rf_data.rf_mutex);
+			return SYSERR;
+		}
+		break;
+
+	/* Obtain current file size (cannot use rfsndmsg because a	*/
+	/*	response contains a value in addition to the header)	*/
+
+	case RFS_CTL_SIZE:
+
+		/* Hand-craft a size request message */
+
+		msg.rf_type = htons(RF_MSG_SREQ);
+		msg.rf_status = htons(0);
+		msg.rf_seq = 0;		/* Rfscomm will set the seq num	*/
+
+		/* Send the request to server and obtain a response	*/
+
+		retval = rfscomm( (struct rf_msg_hdr *)&msg,
+					sizeof(struct rf_msg_sreq),
+				  (struct rf_msg_hdr *)&resp,
+					sizeof(struct rf_msg_sres) );
+		if ( (retval == SYSERR) || (retval == TIMEOUT) ) {
+			signal(Rf_data.rf_mutex);
+			return SYSERR;
+		} else {
+			signal(Rf_data.rf_mutex);
+			return ntohl(resp.rf_size);
+		}
+
+	default:
+		kprintf("rfscontrol: function %d not valid\n", func);
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	}
+
+	signal(Rf_data.rf_mutex);
+	return OK;
+}
diff --git a/device/rfs/rfsgetmode.c b/device/rfs/rfsgetmode.c
new file mode 100644
index 0000000..e3e82ed
--- /dev/null
+++ b/device/rfs/rfsgetmode.c
@@ -0,0 +1,63 @@
+/* rfsgetmode.c - rfsgetmode */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rfsgetmode  -  Parse mode argument and generate integer of mode bits
+ *------------------------------------------------------------------------
+ */
+
+int32	rfsgetmode (
+	 char	*mode			/* String of mode characters	*/
+	)
+{
+	int32	mbits;			/* Mode bits to return (in host	*/
+					/*    byte order)		*/
+	char	ch;			/* Next character in mode string*/
+
+	mbits = 0;
+
+	/* Mode string specifies:					*/
+	/*	r - read						*/
+	/*	w - write						*/
+	/*	o - old (file must exist)				*/
+	/*	n - new (create a new file)				*/
+
+	while ( (ch = *mode++) != NULLCH) {
+		switch (ch) {
+
+		    case 'r':	if (mbits&RF_MODE_R) {
+					return SYSERR;
+				}
+				mbits |= RF_MODE_R;
+				continue;
+
+		    case 'w':	if (mbits&RF_MODE_W) {
+					return SYSERR;
+				}
+				mbits |= RF_MODE_W;
+				continue;
+
+		    case 'o':	if (mbits&RF_MODE_O || mbits&RF_MODE_N) {
+					return SYSERR;
+				}
+				mbits |= RF_MODE_O;
+				break;
+
+		    case 'n':	if (mbits&RF_MODE_O || mbits&RF_MODE_N) {
+					return SYSERR;
+				}
+				mbits |= RF_MODE_N;
+				break;
+
+		    default:	return SYSERR;
+		}
+	}
+
+	/* If neither read nor write specified, allow both */
+
+	if ( (mbits&RF_MODE_RW) == 0 ) {
+		mbits |= RF_MODE_RW;
+	}
+	return mbits;
+}
diff --git a/device/rfs/rfsinit.c b/device/rfs/rfsinit.c
new file mode 100644
index 0000000..9eff0ad
--- /dev/null
+++ b/device/rfs/rfsinit.c
@@ -0,0 +1,39 @@
+/* rfsinit.c - rfsinit */
+
+#include <xinu.h>
+
+struct	rfdata	Rf_data;
+
+/*------------------------------------------------------------------------
+ *  rfsinit  -  Initialize the remote file system master device
+ *------------------------------------------------------------------------
+ */
+devcall	rfsinit(
+	  struct dentry	*devptr		/* Entry in device switch table	*/
+	)
+{
+
+	/* Choose an initial message sequence number */
+
+	Rf_data.rf_seq = 1;
+
+	/* Set the server IP address, server port, and local port */
+
+	if ( dot2ip(RF_SERVER_IP, &Rf_data.rf_ser_ip) == SYSERR ) {
+		panic("invalid IP address for remote file server");
+	}
+	Rf_data.rf_ser_port = RF_SERVER_PORT;
+	Rf_data.rf_loc_port = RF_LOC_PORT;
+
+	/* Create a mutual exclusion semaphore */
+
+	if ( (Rf_data.rf_mutex = semcreate(1)) == SYSERR ) {
+		panic("Cannot create remote file system semaphore");
+	}
+
+	/* Specify that the server port is not yet registered */
+
+	Rf_data.rf_registered = FALSE;
+
+	return OK;
+}
diff --git a/device/rfs/rfsndmsg.c b/device/rfs/rfsndmsg.c
new file mode 100644
index 0000000..75917ae
--- /dev/null
+++ b/device/rfs/rfsndmsg.c
@@ -0,0 +1,46 @@
+/* rfsndmsg.c - rfsndmsg */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rfsndmsg  -  Create and send a message that only has header fields
+ *------------------------------------------------------------------------
+ */
+status	rfsndmsg (
+	 uint16 type,			/* Message type			*/
+	 char	*name			/* Null-terminated file name	*/
+	)
+{
+	struct	rf_msg_hdr  req;	/* Request message to send	*/
+	struct	rf_msg_hdr resp;	/* Buffer for response		*/
+	int32	retval;			/* Return value			*/
+	char	*to;			/* Used during name copy	*/
+
+	/* Form a request */
+
+	req.rf_type = htons(type);
+	req.rf_status = htons(0);
+	req.rf_seq = 0;			/* Rfscomm will set sequence	*/
+	to = req.rf_name;
+	while ( (*to++ = *name++) ) {	/* Copy name to request		*/
+		;
+	}
+
+	/* Send message and receive response */
+
+	retval = rfscomm(&req,  sizeof(struct rf_msg_hdr),
+			 &resp,	sizeof(struct rf_msg_hdr) );
+
+	/* Check response */
+
+	if (retval == SYSERR) {
+		return SYSERR;
+	} else if (retval == TIMEOUT) {
+		kprintf("Timeout during remote file server access\n");
+		return SYSERR;
+	} else if (ntohl(resp.rf_status) != 0) {
+		return SYSERR;
+	}
+
+	return OK;
+}
diff --git a/device/rfs/rfsopen.c b/device/rfs/rfsopen.c
new file mode 100644
index 0000000..bee91a0
--- /dev/null
+++ b/device/rfs/rfsopen.c
@@ -0,0 +1,114 @@
+/* rfsopen.c - rfsopen */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * rfsopen  -  Allocate a remote file pseudo-device for a specific file
+ *------------------------------------------------------------------------
+ */
+
+devcall	rfsopen (
+	 struct	dentry	*devptr,	/* Entry in device switch table	*/
+	 char	*name,			/* File name to use		*/
+	 char	*mode			/* Mode chars: 'r' 'w' 'o' 'n'	*/
+	)
+{
+	struct	rflcblk	*rfptr;		/* Ptr to control block entry	*/
+	struct	rf_msg_oreq msg;	/* Message to be sent		*/
+	struct	rf_msg_ores resp;	/* Buffer to hold response	*/
+	int32	retval;			/* Return value from rfscomm	*/
+	int32	len;			/* Counts chars in name		*/
+	char	*nptr;			/* Pointer into name string	*/
+	char	*fptr;			/* Pointer into file name	*/
+	int32	i;			/* General loop index		*/
+
+	/* Wait for exclusive access */
+
+	wait(Rf_data.rf_mutex);
+
+	/* Search control block array to find a free entry */
+
+	for(i=0; i<Nrfl; i++) {
+		rfptr = &rfltab[i];
+		if (rfptr->rfstate == RF_FREE) {
+			break;
+		}
+	}
+	if (i >= Nrfl) {		/* No free table slots remain	*/
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	}
+
+	/* Copy name into free table slot */
+
+	nptr = name;
+	fptr = rfptr->rfname;
+	len = 0;
+	while ( (*fptr++ = *nptr++) != NULLCH) {
+		len++;
+		if (len >= RF_NAMLEN) {	/* File name is too long	*/
+			signal(Rf_data.rf_mutex);
+			return SYSERR;
+		}
+	}
+
+	/* Verify that name is non-null */
+
+	if (len==0) {
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	}
+
+	/* Parse mode string */
+
+	if ( (rfptr->rfmode = rfsgetmode(mode)) == SYSERR ) {
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	}
+
+	/* Form an open request to create a new file or open an old one */
+
+	msg.rf_type = htons(RF_MSG_OREQ);/* Request a file open		*/
+	msg.rf_status = htons(0);
+	msg.rf_seq = 0;			/* Rfscomm fills in seq. number	*/
+	nptr = msg.rf_name;
+	memset(nptr, NULLCH, RF_NAMLEN);/* Initialize name to zero bytes*/
+	while ( (*nptr++ = *name++) != NULLCH ) { /* Copy name to req.	*/
+		;
+	}
+	msg.rf_mode = htonl(rfptr->rfmode); /* Set mode in request	*/
+
+	/* Send message and receive response */
+
+	retval = rfscomm((struct rf_msg_hdr *)&msg,
+					sizeof(struct rf_msg_oreq),
+			 (struct rf_msg_hdr *)&resp,
+					sizeof(struct rf_msg_ores) );
+
+	/* Check response */
+
+	if (retval == SYSERR) {
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	} else if (retval == TIMEOUT) {
+		kprintf("Timeout during remote file open\n\r");
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	} else if (ntohs(resp.rf_status) != 0) {
+		signal(Rf_data.rf_mutex);
+		return SYSERR;
+	}
+
+	/* Set initial file position */
+
+	rfptr->rfpos = 0;
+
+	/* Mark state as currently used */
+
+	rfptr->rfstate = RF_USED;
+
+	/* Return device descriptor of newly created pseudo-device */
+
+	signal(Rf_data.rf_mutex);
+	return rfptr->rfdev;
+}
diff --git a/device/spi/spicontrol.c b/device/spi/spicontrol.c
new file mode 100644
index 0000000..c77d683
--- /dev/null
+++ b/device/spi/spicontrol.c
@@ -0,0 +1,19 @@
+/* spicontrol.c - spicontrol */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * spicontrol  -  Control function for SPI device
+ *------------------------------------------------------------------------
+ */
+devcall	spicontrol (
+	struct	dentry	*devptr,	/* Entry in device switch table	*/
+	int32	func,			/* Control function		*/
+	int32	arg1,			/* Argument 1, if needed	*/
+	int32	arg2			/* Argument 2, if needed	*/
+	)
+{
+	struct	spi_csreg *csrptr;	/* SPI control and status regs	*/
+
+	return OK;
+}
diff --git a/device/spi/spiinit.c b/device/spi/spiinit.c
new file mode 100644
index 0000000..d2e5ce2
--- /dev/null
+++ b/device/spi/spiinit.c
@@ -0,0 +1,36 @@
+#include <xinu.h>
+
+int32	spiinit (
+		 struct	dentry *devptr
+		)
+{
+	struct spi_csreg *spiptr;	/* SPI control and status regs	*/
+	struct clock_csreg *cptr; 
+
+	//kprintf("INIT SPI!\n");
+
+	/* Enable SPI clock */
+	cptr = (struct clock_csreg *)CLOCK_BASE;
+	cptr->apb2enr |= (1 << SPI1EN);
+	
+	/* Configure SPI peripheral */
+	if(devptr->dvminor == 0) {
+		spiptr = (struct spi_csreg *)SPI1_BASE;
+	}
+	else {
+		kprintf("SPI device not recognized\n");
+		return SYSERR;
+	}
+
+	spiptr->cr1 &= ~(1 << SPI_ENABLE); // temporarily disable device
+	spiptr->cr1 |= (1 << SPI_MSTR) | (1 << SPI_SSM) | (1 << SPI_SSI) |
+		(1 << SPI_BIDIMODE) | (1 << SPI_BIDIOE);
+
+	/* Set Baud rate */
+	spiptr->cr1 |= BR_FPCLKDIV8;
+
+	/* Enable SPI peripheral */
+	spiptr->cr1 |= (1 << SPI_ENABLE);
+
+	return OK;
+}
diff --git a/device/spi/spiputc.c b/device/spi/spiputc.c
new file mode 100644
index 0000000..35b9267
--- /dev/null
+++ b/device/spi/spiputc.c
@@ -0,0 +1,21 @@
+#include <xinu.h>
+
+int32	spiputc (struct dentry *devptr, char c)
+{
+	struct spi_csreg *spiptr;	/* SPI control and status regs	*/
+
+	/* Configure SPI peripheral */
+	if(devptr->dvminor == 0) {
+		spiptr = (struct spi_csreg *)SPI1_BASE;
+	}
+	else {
+		kprintf("SPI device not recognized\n");
+		return SYSERR;
+	}
+
+	/* Check if buffer is empty -- busy wait TODO: interrupts */
+	while (spiptr->sr & ~(1 << SPI_TXE));
+	spiptr->dr = c;
+
+	return OK;
+}
diff --git a/include/arp.h b/include/arp.h
new file mode 100644
index 0000000..e2a30b3
--- /dev/null
+++ b/include/arp.h
@@ -0,0 +1,50 @@
+/* arp.h */
+
+/* Items related to ARP - definition of cache and the packet format */
+
+#define	ARP_HALEN	6		/* Size of Ethernet MAC address	*/
+#define	ARP_PALEN	4		/* Size of IP address		*/
+
+#define	ARP_HTYPE	1		/* Ethernet hardware type	*/
+#define ARP_PTYPE	0x0800		/* IP protocol type		*/
+
+#define ARP_OP_REQ	1		/* Request op code		*/
+#define ARP_OP_RPLY	2		/* Reply op code		*/
+
+#define	ARP_SIZ		16		/* Number of entries in a cache	*/
+
+#define	ARP_RETRY	3		/* Num. retries for ARP request	*/
+
+#define	ARP_TIMEOUT	300		/* Retry timer in milliseconds	*/
+
+/* State of an ARP cache entry */
+
+#define	AR_FREE		0		/* Slot is unused		*/
+#define	AR_PENDING	1		/* Resolution in progress	*/
+#define	AR_RESOLVED	2		/* Entry is valid		*/
+
+#pragma pack(2)
+struct	arppacket {			/* ARP packet for IP & Ethernet	*/
+	byte	arp_ethdst[ETH_ADDR_LEN];/* Ethernet dest. MAC addr	*/
+	byte	arp_ethsrc[ETH_ADDR_LEN];/* Ethernet source MAC address */
+	uint16	arp_ethtype;		/* Ethernet type field		*/
+	uint16	arp_htype;		/* ARP hardware type		*/
+	uint16	arp_ptype;		/* ARP protocol type		*/
+	byte	arp_hlen;		/* ARP hardware address length	*/
+	byte	arp_plen;		/* ARP protocol address length	*/
+	uint16	arp_op;			/* ARP operation		*/
+	byte	arp_sndha[ARP_HALEN];	/* ARP sender's Ethernet addr 	*/
+	uint32	arp_sndpa;		/* ARP sender's IP address	*/
+	byte	arp_tarha[ARP_HALEN];	/* ARP target's Ethernet addr	*/
+	uint32	arp_tarpa;		/* ARP target's IP address	*/
+};
+#pragma pack()
+
+struct	arpentry {			/* Entry in the ARP cache	*/
+	int32	arstate;		/* State of the entry		*/
+	uint32	arpaddr;		/* IP address of the entry	*/
+	pid32	arpid;			/* Waiting process or -1 	*/
+	byte	arhaddr[ARP_HALEN];	/* Ethernet address of the entry*/
+};
+
+extern struct	arpentry arpcache[];
diff --git a/include/bufpool.h b/include/bufpool.h
new file mode 100644
index 0000000..b28877f
--- /dev/null
+++ b/include/bufpool.h
@@ -0,0 +1,27 @@
+/* bufpool.h */
+
+#ifndef	NBPOOLS
+// RAFA #define	NBPOOLS	20		/* Maximum number of buffer pools	*/
+#define	NBPOOLS	5		/* Maximum number of buffer pools	*/
+#endif
+
+#ifndef	BP_MAXB
+// #define	BP_MAXB	8192		/* Maximum buffer size in bytes		*/
+#define	BP_MAXB	20		/* Maximum buffer size in bytes		*/
+#endif
+
+#define	BP_MINB	8		/* Minimum buffer size in bytes		*/
+#ifndef	BP_MAXN
+// RAFA #define	BP_MAXN	2048		/* Maximum number of buffers in a pool	*/
+#define	BP_MAXN	10		/* Maximum number of buffers in a pool	*/
+#endif
+
+struct	bpentry	{		/* Description of a single buffer pool	*/
+	struct	bpentry *bpnext;/* pointer to next free buffer		*/
+	sid32	bpsem;		/* semaphore that counts buffers	*/
+				/*    currently available in the pool	*/
+	uint32	bpsize;		/* size of buffers in this pool		*/
+	};
+
+extern	struct	bpentry buftab[];/* Buffer pool table			*/
+extern	bpid32	nbpools;	/* current number of allocated pools	*/
diff --git a/include/clk.h b/include/clk.h
new file mode 100644
index 0000000..e798cc1
--- /dev/null
+++ b/include/clk.h
@@ -0,0 +1,82 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+#define CLOCK_BASE 0x40021000;
+
+/* Enable and check clock */
+#define PLL_ENABLE 	24	
+#define PLL2_ENABLE 	26
+#define PLL3_ENABLE	28
+#define HSE_ENABLE 	16
+#define HSI_ENABLE 	1
+#define HSE_READY	17
+
+/* System clock switch */
+#define HSI_SYSTEMCLOCK	0
+#define HSE_SYSTEMCLOCK	1
+#define PLL_SYSTEMCLOCK	2
+
+#define SWITCH_READY	3
+
+/* PLL setting */
+#define PPLx4		0x00080000
+#define PPLx5		0x000C0000
+#define PPLx6		0x00100000
+#define PPLx7		0x00140000
+#define PPLx8		0x00180000
+#define PPLx9		0x001C0000
+
+#define HSE_PLL_SOURCE 	16
+#define HSE_DIVIDERPLL	17
+
+/* Enable Clock Signals APB2 */
+#define IOPAEN		2
+#define IOPBEN		3
+#define IOPCEN		4
+#define IOPDEN		5
+#define IOPEEN		6
+#define IOPFEN		7
+#define	IOPGEN		8
+#define ADC1EN		9
+#define ADC2EN		10
+#define TIM1EN		11
+#define SPI1EN		12
+#define TIM8EN		13
+#define USART1EN	14
+
+/* Enable Clock Signals APB1 */
+#define TIM2EN		0
+#define	TIM3EN		1
+#define	TIM4EN		2
+#define	TIM5EN		3
+#define	TIM6EN		4
+
+//int clockinit(struct dentry * devptr);
+//int clockcontrol(struct dentry * devptr, int32_t func, int32_t, int32_t);
+
+struct clock_csreg {
+	volatile uint32 cr;
+	volatile uint32 cfgr;
+	volatile uint32 cir;
+	volatile uint32 apb2rstr;
+	volatile uint32 apb1rstr;
+	volatile uint32 ahbenr;
+	volatile uint32 apb2enr;
+	volatile uint32 apb1enr;
+	volatile uint32 bdcr;
+	volatile uint32 csr;
+	volatile uint32 ahbstr;
+	volatile uint32 cfgr2;
+};
+
diff --git a/include/cortexm3.h b/include/cortexm3.h
new file mode 100644
index 0000000..9cd7098
--- /dev/null
+++ b/include/cortexm3.h
@@ -0,0 +1,27 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+/* Nested interrupt vector */
+#define NVIC_ISER0	(uint32 *) 0xE000E100
+#define	NVIC_ISER1	(uint32 *) 0xE000E104
+#define NVIC_STIR	(uint32 *) 0xE000EF00
+
+/* System control block */
+#define SCB_ICSR	(uint32 *) 0xE000ED04
+#define PENDSV_INTR	28
+
+// #define MAXADDR		0x20010000		/* 64kB SRAM */
+#define MAXADDR		0x20004E20		/* 64kB SRAM */ // RAFA
+// #define MAXADDR		0x20004000		/* 64kB SRAM */ // RAFA
+#define HANDLERSTACK	1024			/* Size reserved for stack in Handler mode */
diff --git a/include/ctype.h b/include/ctype.h
new file mode 100644
index 0000000..53b2618
--- /dev/null
+++ b/include/ctype.h
@@ -0,0 +1,33 @@
+/* ctype.h
+ *
+ * Includes isalpha, isupper, islower, isdigit, isspace, ispunct, isalnum,
+ * isprint, iscntrl, toupper, tolower, toascii, iseof
+*/
+
+#define _U 0x01
+#define _L 0x02
+#define _N 0x04
+#define _S 0x08
+#define _P 0x10
+#define _C 0x20
+#define _X 0x40
+
+extern const char _ctype_[];
+
+#define isalpha(c)   ((_ctype_+1)[(int)c]&(_U|_L))
+#define isupper(c)   ((_ctype_+1)[(int)c]&_U)
+#define islower(c)   ((_ctype_+1)[(int)c]&_L)
+#define isdigit(c)   ((_ctype_+1)[(int)c]&_N)
+#define isxdigit(c)  ((_ctype_+1)[(int)c]&(_N|_X))
+#define isspace(c)   ((_ctype_+1)[(int)c]&_S)
+#define ispunct(c)   ((_ctype_+1)[(int)c]&_P)
+#define isalnum(c)   ((_ctype_+1)[(int)c]&(_U|_L|_N))
+#define isprint(c)   ((_ctype_+1)[(int)c]&(_P|_U|_L|_N|_S))
+#define iscntrl(c)   ((_ctype_+1)[(int)c]&_C)
+#define isascii(c)   ((unsigned)((int)(c))<=0x7F)
+
+#define toupper(c)   (((int)(c))-'a'+'A')
+#define tolower(c)   (((int)(c))-'A'+'a')
+#define toascii(c)   (((int)(c))&0x7F)
+
+#define iseof(c)     (0x04 == (int)c)
diff --git a/include/date.h b/include/date.h
new file mode 100644
index 0000000..4d64547
--- /dev/null
+++ b/include/date.h
@@ -0,0 +1,67 @@
+/* date.h - ntim2xtim, xtim2ntim, isleap, utim2ltim */
+
+/************************************************************************/
+/*									*/
+/* 	Constants and declarations for date storage and conversion	*/
+/*									*/
+/*   Xinu stores time as seconds past Jan 1, 1970 (UNIX format), with	*/
+/* 1 being 1 second into Jan. 1, 1970, GMT (universal time).  The	*/
+/* Internet uses seconds past Jan 1, 1900 (also GMT or Universal Time)	*/
+/*									*/
+/************************************************************************/
+
+/* Conversion between network and local representations */
+
+#define	ntim2xtim(x)  ((x)-2208988800U)	/* net-to-xinu time		*/
+#define	xtim2ntim(x)  ((x)+2208988800U)	/* xinu-to-net time		*/
+
+/* Constants for Daylight Savings Time					*/									
+
+#define	DATE_DST_OFF	0		/* force DST to be off		*/
+#define	DATE_DST_ON	1		/* force DST to be on		*/
+#define	DATE_DST_AUTO	2		/* compute DST automatically	*/
+
+/* Days in months and month names used to format a date */
+
+struct	dateinfo {
+	uint32	dt_boot;		/* time when system booted	*/
+					/*  add clktime to get the	*/
+					/*  current time-of-day		*/
+	bool8	dt_bootvalid;		/* is dt_boot field valid?	*/
+	int32	dt_daylight;		/* whether to compute daylight	*/
+					/*   savings time		*/
+	int32	dt_msize[12];		/* days per month		*/
+	char	*dt_mnam[12];		/* month names			*/
+	char	*dt_dnam[7];		/* day names			*/
+};
+
+extern	struct	dateinfo Date;		/* Global date information	*/
+
+/* Constants for converting time to month/day/year/hour/minute/second	*/
+
+#define	isleap(x)	((x)%4==0)	/* leap year? (1970-2099)	*/
+#define	SECPERDY	(60*60*24)	/* one day in seconds		*/
+#define	SECPERHR	(60*60)		/* one hour in seconds		*/
+#define	SECPERMN	(60)		/* one minute in seconds	*/
+
+/* The local time zone can be set to EST, CST, MST,or PST.		*/
+
+#define	ZONE_EST	5		/* Eastern Standard time is 5	*/
+#define	ZONE_CST	6		/*  hours west of England	*/
+#define	ZONE_MST	7
+#define	ZONE_PST	8
+#define	TIMEZONE	ZONE_EST	/* timezone for this system	*/
+
+/* In-line procedures to convert universal-to-local time and vice versa	*/
+
+#define	utim2ltim(x)	((x)-TIMEZONE*SECPERHR)
+#define	ltim2utim(x)	((x)+TIMEZONE*SECPERHR)
+
+#define	TIMERPORT	123		/* UDP port for time server	*/
+#define	TIMELPORT	53678		/* local UDP port for time	*/
+
+#ifndef	TIMESERVER
+#define	TIMESERVER	"128.10.19.24"	/* IP address of NTP time server*/
+#endif
+
+#define	TIMETIMEOUT	2000		/* timeout for time server (ms)	*/
diff --git a/include/debug.h b/include/debug.h
new file mode 100644
index 0000000..fa99ece
--- /dev/null
+++ b/include/debug.h
@@ -0,0 +1,8 @@
+/* debug.h */
+
+#define DEBUG_ASCII 0x01
+#define DEBUG_HEX   0x02
+
+void hexdump(void *buffer, uint32 length, bool8 text);
+void debugbreak(void);
+void debugret(void);
diff --git a/include/delay.h b/include/delay.h
new file mode 100644
index 0000000..5ffe34f
--- /dev/null
+++ b/include/delay.h
@@ -0,0 +1,25 @@
+/* delay.h - DELAY */
+
+/*
+ * Delay units are in microseconds.
+ */
+#define	DELAY(n)                                	\
+{                                               	\
+	volatile long N = 2*n;				\
+							\
+	while(N > 0) {					\
+		N--;					\
+	}						\
+}
+
+/*
+ * Delay units are in milli-seconds.
+ */
+#define	MDELAY(n)					\
+{							\
+	register long i;				\
+							\
+	for (i=n;i>0;i--) {				\
+		DELAY(1000);				\
+	}						\
+}
diff --git a/include/device.h b/include/device.h
new file mode 100644
index 0000000..14f5c64
--- /dev/null
+++ b/include/device.h
@@ -0,0 +1,7 @@
+/* device.h - isbaddev */
+
+#define	DEVNAMLEN	16	/* maximum size of a device name	*/
+
+/* Macro used to verify device ID is valid  */
+
+#define isbaddev(f)  ( ((f) < 0) | ((f) >= NDEVS) )
diff --git a/include/dhcp.h b/include/dhcp.h
new file mode 100644
index 0000000..56710f9
--- /dev/null
+++ b/include/dhcp.h
@@ -0,0 +1,58 @@
+/* dhcp.h - Definitions related to DHCP */
+
+#define DHCP
+
+#define DHCP_RETRY 	5
+
+#define DHCP_PADDING                    0
+#define DHCP_SUBNET_MASK                1
+#define DHCP_ROUTER                     3
+#define DHCP_DNS_SERVER                 6
+#define DHCP_DOMAIN_NAME                15
+#define DHCP_VENDER_OPTIONS             43
+#define DHCP_REQUESTED_IP               50
+#define DHCP_IP_ADDR_LEASE_TIME         51
+#define DHCP_OPTION_OVERLOAD            52
+#define DHCP_MESSAGE_TYPE               53
+#define DHCP_SERVER_ID                  54
+#define DHCP_PARAMETER_REQUEST_LIST     55
+#define DHCP_MESSAGE                    56
+#define DHCP_MAXIMUM_DHCP_MESSAGE_SIZE  57
+#define DHCP_RENEWAL_TIME_VALUE         58
+#define DHCP_REBINDING_TIME_VALUE       59
+#define DHCP_VENDOR_CLASS_ID            60
+#define DHCP_CLIENT_ID                  61
+#define DHCP_TFTP_SERVER_NAME           66
+#define DHCP_BOOTFILE_NAME              67
+#define DHCP_CLIENT_SYS_ARCH            93
+#define DHCP_CLIENT_NET_ID              94
+#define DHCP_CLIENT_MACHINE_ID          97
+#define DHCP_MESSAGE_END               255
+
+#pragma pack(2)
+struct	dhcpmsg	{
+	byte	dc_bop;			/* DHCP bootp op 1=req 2=reply	*/
+	byte	dc_htype;		/* DHCP hardware type		*/
+	byte	dc_hlen;		/* DHCP hardware address length	*/
+	byte	dc_hops;		/* DHCP hop count		*/
+	uint32	dc_xid;			/* DHCP xid			*/
+	uint16	dc_secs;		/* DHCP seconds			*/
+	uint16	dc_flags;		/* DHCP flags			*/
+	uint32	dc_cip;			/* DHCP client IP address	*/
+	uint32	dc_yip;			/* DHCP your IP address		*/
+	uint32	dc_sip;			/* DHCP server IP address	*/
+	uint32	dc_gip;			/* DHCP gateway IP address	*/
+	byte	dc_chaddr[16];		/* DHCP client hardware address	*/
+	union {
+		byte	dc_bootp[192];	/* DHCP bootp area (zero)	*/
+		struct {
+			byte   sname[64];	/* TFTP Server Name	*/
+			byte   bootfile[128];	/* TFTP File name	*/
+		};
+	};
+	uint32	dc_cookie;		/* DHCP cookie			*/
+	byte	dc_opt[1024];		/* DHCP options area (large	*/
+					/*  enough to hold more than	*/
+					/*  reasonable options		*/
+};
+#pragma pack()
diff --git a/include/dns.h b/include/dns.h
new file mode 100644
index 0000000..9013f2e
--- /dev/null
+++ b/include/dns.h
@@ -0,0 +1,61 @@
+/* dns.h */
+
+/* Constants and data structures used for DNS */
+
+#define	DNSTIMEOUT	3000		/* Timeout for a response (ms)	*/
+#define	DNSRETRY	3		/* Number of times to retry	*/
+#define	DNSPORT		53		/* Well-known DNS UDP port	*/
+#define	DNSLPORT	51525		/* Local UDP port to use	*/
+#define	DNSDATASIZ	500		/* Size of the data area	*/
+
+
+/* Format of a DNS Query/Response packet */
+
+struct	dnspkt {
+	uint16	id;			/* DNS Query ID			*/
+	struct	{
+		byte	rd:1;		/* Recursion Desired		*/
+		byte	tc:1;		/* Truncation			*/
+		byte	aa:1;		/* Authoritative Answer		*/
+		byte	opcode:4;	/* Operation Code		*/
+		byte	qr:1;		/* Query=0, Response=1		*/
+	};
+	struct	{
+		byte	rcode:4;	/* Response Code		*/
+		byte	z:3;		/* Reserved, must be 0		*/
+		byte	ra:1;		/* Recursion Available		*/
+	};
+	uint16	qucount;		/* No. of Questions		*/
+	uint16	ancount;		/* No. of RRs in Answer		*/
+	uint16	nscount;		/* No of Name Server RRs	*/
+	uint16	arcount;		/* No. of RRs in Additional info*/
+	char	data[DNSDATASIZ];	/* DNS data area		*/
+};
+
+/* QType Values */
+
+#define	DNS_QT_A	1		/* DNS Address Type (A)		*/
+#define DNS_QT_NS	2		/* DNS Name Server Type		*/
+
+/* QClass values */
+
+#define	DNS_QC_IN	1		/* DNS QClass Internet		*/
+
+/* Format of a DNS Question */
+
+struct	dns_q {
+	char	*qname;			/* Domain Name in the query	*/
+	uint16	*qtype;			/* Question Type		*/
+	uint16	*qclass;		/* Question Class		*/
+};
+
+/* Format of a DNS Resource Record */
+
+struct	dns_rr {
+	char	*rname;			/* Domain Name			*/
+	uint16	*rtype;			/* Resource Record Type		*/
+	uint16	*rclass;		/* Resource Record Class	*/
+	uint32	*ttl;			/* Resource Record Time-to-Live	*/
+	uint16	*rdlen;			/* Resource Record RD Length	*/
+	char	*rdata;			/* Resource Record Data area	*/
+};
diff --git a/include/ether.h b/include/ether.h
new file mode 100644
index 0000000..9cacc93
--- /dev/null
+++ b/include/ether.h
@@ -0,0 +1,116 @@
+/* ether.h */
+
+/* Ethernet packet format:
+
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ |  Dest. MAC (6)  |  Src. MAC (6)   |Type (2)|      Data (46-1500)...   |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+*/
+
+#define	ETH_ADDR_LEN	6	/* Length of Ethernet (MAC) address	*/
+typedef	unsigned char	Eaddr[ETH_ADDR_LEN];/* a physical Ethernet address*/
+
+/* Ethernet packet header */
+
+struct	etherPkt {
+	byte	dst[ETH_ADDR_LEN];	/* Destination Mac address	*/
+	byte	src[ETH_ADDR_LEN];	/* Source Mac address		*/
+	uint16	type;			/* Ether type field		*/
+	byte	data[1];		/* Packet payload		*/
+};
+
+#define	ETH_HDR_LEN		14	/* Length of Ethernet packet 	*/
+					/*  header			*/
+
+/* Ethernet DMA buffer sizes */
+
+#define	ETH_MTU			1500	/* Maximum transmission unit	*/
+#define	ETH_VLAN_LEN		4	/* Length of Ethernet vlan tag	*/
+#define ETH_CRC_LEN		4	/* Length of CRC on Ethernet 	*/
+					/*  frame			*/
+
+#define	ETH_MAX_PKT_LEN	( ETH_HDR_LEN + ETH_VLAN_LEN + ETH_MTU )
+
+#define	ETH_BUF_SIZE		1518	/* 1500 MTU + 14 ETH Header + 4 bytes optional VLAN Tagging */
+
+/* State of the Ethernet interface */
+
+#define	ETH_STATE_FREE		0	/* control block is unused 	*/
+#define	ETH_STATE_DOWN		1	/* interface is currently  	*/
+					/* 	inactive 		*/
+#define	ETH_STATE_UP		2	/* interface is currently active*/
+
+/* Ethernet device control functions */
+
+#define	ETH_CTRL_GET_MAC     	1 	/* Get the MAC for this device	*/
+
+/* Ethernet multicast */
+
+#define ETH_NUM_MCAST		32     /* Max number of multicast addresses*/
+
+/* Ehternet NIC type */
+
+#define ETH_TYPE_3C905C 	1
+#define ETH_TYPE_E1000E 	2
+
+#define ETH_PHY_CTLREG	0
+#define ETH_PHY_STATREG	1
+
+#define ETH_PHY_CTLREG_RESET	0x8000
+#define ETH_PHY_CTLREG_SM	0x2040	/* Speed Mask	*/
+#define ETH_PHY_10M		0x0000
+#define ETH_PHY_100M		0x2000
+#define ETH_PHY_1000M		0x0040
+#define ETH_PHY_CTLREG_FD	0x0100
+
+#define ETH_PHY_STATREG_LINK	0x0004
+
+struct	ethcblk	{
+	byte	state; 		/* ETH_STATE_... as defined above 	*/
+	struct	dentry	*phy;	/* physical eth device for Tx DMA 	*/
+	byte 	type; 		/* NIC type_... as defined above 	*/
+
+	/* Pointers to associated structures */
+
+	struct	dentry	*dev;	/* address in device switch table	*/
+	void	*csr;		/* addr.of control and status regs.	*/
+	uint32	pcidev;		/* PCI device number			*/
+	uint32	iobase;		/* I/O base from config			*/
+	uint32  flashbase;      /* flash base from config	       	*/
+    	uint32	membase; 	/* memory base for device from config	*/
+
+	void    *rxRing;	/* ptr to array of recv ring descriptors*/
+	void    *rxBufs; 	/* ptr to Rx packet buffers in memory	*/
+	uint32	rxHead;		/* Index of current head of Rx ring	*/
+	uint32	rxTail;		/* Index of current tail of Rx ring	*/
+	uint32	rxRingSize;	/* size of Rx ring descriptor array	*/
+	uint32	rxIrq;		/* Count of Rx interrupt requests       */
+
+	void    *txRing; 	/* ptr to array of xmit ring descriptors*/
+	void    *txBufs; 	/* ptr to Tx packet buffers in memory	*/
+	uint32	txHead;		/* Index of current head of Tx ring	*/
+	uint32	txTail;		/* Index of current tail of Tx ring	*/
+	uint32	txRingSize;	/* size of Tx ring descriptor array	*/
+	uint32	txIrq;		/* Count of Tx interrupt requests       */
+
+	byte	devAddress[ETH_ADDR_LEN];/* MAC address 		*/
+
+	uint8	addrLen;	/* Hardware address length	      	*/
+	uint16	mtu;	    	/* Maximum transmission unit (payload)  */
+
+	uint32	errors;		/* Number of Ethernet errors 		*/
+	sid32	isem;		/* Semaphore for Ethernet input		*/
+	sid32	osem; 		/* Semaphore for Ethernet output	*/
+	uint16	istart;		/* Index of next packet in the ring     */
+
+	int16	inPool;		/* Buffer pool ID for input buffers 	*/
+	int16	outPool;	/* Buffer pool ID for output buffers	*/
+
+	int16 	proms; 		/* nonzero => promiscuous mode 		*/
+
+	int16 	ed_mcset;       /* nonzero => multicast reception set   */
+	int16 	ed_mcc;	 	/* count of multicast addresses		*/
+    	Eaddr   ed_mca[ETH_NUM_MCAST];/* array of multicast addrs 	*/
+};
+
+extern	struct	ethcblk	ethertab[];	/* array of control blocks      */
diff --git a/include/ethloop.h b/include/ethloop.h
new file mode 100644
index 0000000..b7043b0
--- /dev/null
+++ b/include/ethloop.h
@@ -0,0 +1,65 @@
+/**
+ * @file ethloop.h
+ *
+ * $Id: ethloop.h 2076 2009-09-24 23:05:39Z brylow $
+ */
+/* Embedded Xinu, Copyright (C) 2009.  All rights reserved. */
+
+#ifndef _ETHLOOP_H_
+#define _ETHLOOP_H_
+
+
+#define ELOOP_MTU          1500
+#define ELOOP_LINKHDRSIZE  ETH_HDR_LEN
+
+#define ELOOP_BUFSIZE      ELOOP_MTU + ELOOP_LINKHDRSIZE
+#define ELOOP_NBUF         100
+
+#define ELOOP_CTRL_GETHOLD	1
+#define ELOOP_CTRL_SETFLAG  2
+#define ELOOP_CTRL_CLRFLAG	3
+
+#define ELOOP_FLAG_HOLDNXT	0x01  /**< place next written pkt in hold  */
+#define ELOOP_FLAG_DROPNXT	0x04  /**< drop next written pkt           */
+#define ELOOP_FLAG_DROPALL	0x08  /**< drop all written pkts           */
+
+#define ELOOP_STATE_FREE        0
+#define ELOOP_STATE_ALLOC       1
+
+/**
+ * Loopback device control block
+ */
+struct ethloop
+{
+    int state;                      /**< device state                       */
+    struct dentry *dev;                    /**< device table entry                 */
+    int poolid;                     /**< poolid for the buffer pool         */
+    byte flags;                    /**< flags                              */
+
+    /* Packet queue */
+    int index;                  /**< index of first packet in buffer    */
+    sid32	sem;              /**< number of packets in buffer        */
+    int count;                      /**< number of packets in buffer        */
+    char *buffer[ELOOP_NBUF];   /**< input buffer                       */
+    int pktlen[ELOOP_NBUF];         /**< length of packet in buffer         */
+
+    /* Hold packet */
+    sid32	hsem;                 /**< number of held packets             */
+    char *hold;                 /**< hold buffer                        */
+    int holdlen;                    /**< length of packet in hold buffer    */
+
+    /* Statistics */
+    uint32 nout;                      /**< number of packets written          */
+};
+
+extern struct ethloop elooptab[];
+
+/* Driver functions */
+devcall ethloopInit(struct dentry *);
+devcall ethloopOpen(struct dentry *);
+devcall ethloopClose(struct dentry *);
+devcall ethloopRead(struct dentry *, void *, uint32);
+devcall ethloopWrite(struct dentry *, void *, uint32);
+devcall ethloopControl(struct dentry *, int, int32, int32);
+
+#endif                          /* _ETHLOOP_H_ */
diff --git a/include/file.h b/include/file.h
new file mode 100644
index 0000000..533517c
--- /dev/null
+++ b/include/file.h
@@ -0,0 +1,20 @@
+/* file.h - definitions commmon to remote and local file systems */
+
+/* Definition of file mode bits */
+
+#define	F_MODE_R	0x01		/* Bit to grant read access	*/
+#define	F_MODE_W	0x02		/* Bit to grant write access	*/
+#define	F_MODE_RW	0x03		/* Mask for read and write bits	*/
+#define	F_MODE_N	0x04		/* Bit for "new" mode		*/
+#define	F_MODE_O	0x08		/* Bit for "old" mode		*/
+					/* Note: new and old mode bits 	*/
+					/*  are mutually exclusive	*/
+#define	F_MODE_NO	0x0C		/* Mask for "n" and "o" bits	*/
+
+/* Control functions for files */
+
+#define	F_CTL_DEL	1		/* Delete a file		*/
+#define	F_CTL_TRUNC	2		/* Truncate a file		*/
+#define	F_CTL_MKDIR	3		/* make a directory		*/
+#define	F_CTL_RMDIR	4		/* remove a directory		*/
+#define F_CTL_SIZE	5		/* Obtain the size of a file	*/
diff --git a/include/flash.h b/include/flash.h
new file mode 100644
index 0000000..3b3371e
--- /dev/null
+++ b/include/flash.h
@@ -0,0 +1,263 @@
+/**
+ * @file flash.h
+ * This file provides various definitions and prototypes for the flash
+ * driver and all its affiliates
+ *
+ * $Id: flash.h 2065 2009-09-04 21:44:36Z brylow $
+ */
+/* Embedded XINU, Copyright (C) 2007.  All rights reserved. */
+
+
+#ifndef _FLASH_H_
+#define _FLASH_H_
+
+/* Disk variables */
+#define MAX_LIVE_BLOCKS 8   /**< number of blocks to keep in memory  */
+#define FLASH_BLK_SIZE  512 /**< disk blocks are 512 bytes           */
+
+#define FLASH_BLOCK_FREE  0 /**< block can be allocated              */
+#define FLASH_BLOCK_CLEAN 1 /**< block has been read but not writted */
+#define FLASH_BLOCK_DIRTY 2 /**< block has been changed              */
+
+/* Important disk block sections */
+#define CFE_MIN_BLOCK    0x0000 /**< Physical addr: 0x000000         */
+#define CFE_MAX_BLOCK    0x01FF /**< Physical addr: 0x03ffff         */
+#define KERNEL_MIN_BLOCK 0x0200 /**< Physical addr: 0x040000         */
+#define KERNEL_MAX_BLOCK 0x03FF /**< Physical addr: 0x07ffff         */
+#define NVRAM_MIN_BLOCK  0x1FC0 /**< Physical addr: 0x3F8000         */
+#define NVRAM_MAX_BLOCK  0x1FFF /**< Physical addr: 0x3fffff         */
+
+/* Flash control switch values */
+#define FLASH_BLOCK_SIZE 0x0000 /**< get the size of disk blocks */
+#define FLASH_N_BLOCKS   0x0001 /**< get number of disk blocks   */
+#define FLASH_SYNC       0x0002 /**< force sync of disk device   */
+
+/* Flash variables */
+#define FLASH_WIDEMODE 1
+#define MAX_REGIONS    8
+
+/* TRX variables */
+#define TRX_MAGIC   0x30524448
+
+/* Structures */
+struct trx_header
+{
+    uint32 magic;                 /**< "HDR0"                              */
+    uint32 len;                   /**< Length of file including header     */
+    uint32 crc;                   /**< 32-bit CRC from flag_vers to EOF    */
+    uint32 flags_vers;             /**< 0-15 flags, 16-31 version           */
+    uint32 offsets[3];            /**< Partition offsets from header start */
+};
+
+/* File structure */
+struct file
+{
+    uint32 len;
+    char *name;
+    void *data;
+};
+
+struct flash_region
+{
+    uint32 nblocks;              /**< number of blocks within region      */
+    uint32 block_size;           /**< size of block in region             */
+    uint32 region_start;         /**< beginning of region in memory       */
+    uint32 region_size;          /**< size of region in bytes             */
+};
+
+struct flash_block
+{
+    uint32 start_pos;            /**< physical position data starts at    */
+    uint32 size;                 /**< size of this block                  */
+    byte state;                /**< state of this block                 */
+    void *buffer;               /**< buffer for this block               */
+};
+
+struct flash
+{
+    struct dentry *device;             /**< flash entry in dev structure        */
+    byte commands;             /**< command set the interface uses      */
+    uint32 base;                 /**< base address for flash memory       */
+    sid32	lock;             /**< lock for execution flash operations */
+    uint32 size;                 /**< size (in bytes) of flash memory     */
+    byte mode;                 /**< current mode of flash               */
+    uint16 nregions;            /**< number of regions on device         */
+    struct flash_region regions[MAX_REGIONS];     /**< region info.      */
+
+    uint32 log_size;             /**< size of logical disk blocks         */
+    uint32 nlog_blocks;          /**< number of logical blocks on disk    */
+
+    /** list of open blocks on flash device                              */
+    struct flash_block erase_blocks[MAX_LIVE_BLOCKS];
+    byte curr_block;           /**< offset of the oldest block stored   */
+};
+
+extern struct flash_block bad_block;
+
+/*
+ * Common Flash Interface Query commands and macros
+ */
+
+/* put/get 8-bits commands for CFI */
+#define CFI_PUT_8(addr,offset,cmd) \
+	*((volatile unsigned char *)((addr)+((offset)<<FLASH_WIDEMODE)))=(cmd)
+#define CFI_GET_8(addr,offset) \
+	*((volatile unsigned char *)((addr)+((offset)<<FLASH_WIDEMODE)))
+
+/* commands for data gathering */
+#define CFI_QUERY_ADDR    0x55
+#define CFI_QUERY_MODE    0x98
+#define CFI_QUERY_EXIT    0xFF
+
+#define CFI_MANUFACTURER  0x00
+#define CFI_DEVICE        0x01
+#define CFI_SIGNATURE     0x10
+#define CFI_QUERY_STRING  0x10
+#define CFI_COMMAND_SET   0x13
+#define CFI_DEV_SIZE      0x27
+#define CFI_DEV_INTERFACE 0x28
+#define CFI_MAX_BUFFER    0x2A
+#define CFI_REGION_COUNT  0x2C
+#define CFI_REGION_TAB    0x2D
+
+/* Known command sets (from CFI publication 100) */
+#define FLASH_INTEL_ECS   0x0001
+#define FLASH_AMD_SCS     0x0002
+#define FLASH_INTEL_SCS   0x0003
+#define FLASH_AMD_ECS     0x0004
+#define FLASH_MTSU_SCS    0x0100
+#define FLASH_MTSU_ECS    0x0101
+
+/*
+ * Intel Flash specifc commands and macros
+ */
+
+/* put/get 8-bits commands for Intel */
+#define INTEL_PUT_8(addr,byte) \
+	*((volatile unsigned char *)((unsigned int)(addr)))=(byte)
+#define INTEL_GET_8(addr) \
+	*((volatile unsigned char *)((unsigned int)(addr)))
+
+/* put/get 8-bits commands for AMD */
+#define AMD_PUT_8(addr,byte) \
+    *((volatile unsigned char *)((unsigned int)(addr)))=(byte)
+#define AMD_GET_8(addr) \
+    *((volatile unsigned char *)((unsigned int)(addr)))
+
+/* put/get 16-bits commands for Intel */
+#define INTEL_PUT_16(addr,word) \
+	*((volatile unsigned int16 *)((unsigned int)(addr)))=(word)
+#define INTEL_GET_16(addr) \
+	*((volatile unsigned int16 *)((unsigned int)(addr)))
+
+/* put/get 16-bits commands for AMD */
+#define AMD_PUT_16(addr,word) \
+    *((volatile unsigned int16 *)((unsigned int)(addr)))=(word)
+#define AMD_GET_16(addr) \
+        *((volatile unsigned int16 *)((unsigned int)(addr)))
+
+
+/* Intel command codes                                               */
+#define INTEL_READ     0xFF   /**< read array (normal read ops)      */
+#define INTEL_PROGRAM  0x40   /**< prepare to write to flash         */
+#define INTEL_ERASE    0x20   /**< prepare to erase a block          */
+#define INTEL_CONFIRM  0xD0   /**< confirm erase command             */
+#define INTEL_RESUME   0xD0   /**< write/erase resume (post-suspend) */
+#define INTEL_UNLOCK   0xD0   /**< soft-unlock a block               */
+#define INTEL_SUSPEND  0xB0   /**< program/erase suspend             */
+#define INTEL_READ_SR  0x70   /**< read status register              */
+#define INTEL_CLR_SR   0x50   /**< clear status register             */
+#define INTEL_READ_ID  0x90   /**< read identifier                   */
+#define INTEL_BLOCKMOD 0x60   /**< prepare block for lock operation  */
+#define INTEL_LOCK     0x01   /**< soft-lock a block                 */
+#define INTEL_LOCKDOWN 0x2F   /**< put a hardware lock on a block    */
+
+/* AMD Command Codes                                                 */
+#define AMD_UNLOCK_CYCLE1   0xAA    /**< write to 0x555              */
+#define AMD_UNLOCK_CYCLE2   0x55    /**< write to 0x2AA              */
+#define AMD_ERASE_CYCLE3    0x80    /**< write to 0x555              */
+#define AMD_ERASE_CYCLE6    0x30    /**< write to erase address      */
+#define AMD_PROGRAM_CYCLE3  0xA0    /**< write to 0x555              */
+#define AMD_RESET           0xF0    /**< write to 0xXXX              */
+#define AMD_READ            0xFF    /**< read command                */
+#define AMD_BLOCKMOD        0x60    /**< prepare block for lock op   */
+#define AMD_LOCK            0x01    /**< soft-lock a block           */
+#define AMD_CLR_SR          0x50    /**< clear status register       */
+
+/* AMD                                                               */
+#define AMD_REG_CYCLE1  0x555      /**< Register for unlock cycle1   */
+#define AMD_REG_CYCLE2  0x2AA      /**< Register for unlock cycle2   */
+#define AMD_SR_WSMS     0x001      /**< Write State Machine Status   */
+
+/* Intel status register offsets                                     */
+#define INTEL_SR_WSMS  7      /**< Write State Machine Status        */
+#define INTEL_SR_ESS   6      /**< Erase-Suspend Status              */
+#define INTEL_SR_ES    5      /**< Erase Status                      */
+#define INTEL_SR_PS    4      /**< Program Status                    */
+#define INTEL_SR_PSS   2      /**< Program Suspend Status            */
+#define INTEL_SR_BLS   1      /**< Block Lock Status                 */
+
+/* Intel identifier register offsets                                 */
+#define INTEL_ID_MFG   0x00   /**< Intel = 0x0089                    */
+#define INTEL_ID_DEV   0x02   /**< Device memory-map                 */
+#define INTEL_ID_BLS   0x04   /**< bit: 0 = soft-lock, 1 = hard-lock */
+
+/* Intel block lock constants                                        */
+#define INTEL_S_LOCK   0x01   /**< software lock                     */
+#define INTEL_H_LOCK   0x02   /**< lock-down (hardward lock)         */
+
+/* AMD block lock constants                                        */
+#define AMD_S_LOCK   0x01   /**< software lock                     */
+#define AMD_H_LOCK   0x02   /**< lock-down (hardward lock)         */
+
+/* flashControl constants                                            */
+#define FLASH_BLOCK    0x00 /**< block is a flash_block struct     */
+#define FLASH_LOGBLOCK 0x01 /**< block is a logical block number   */
+
+/* physicalLock commands                                             */
+#define FLASH_STATUS   0x0000 /**< return status register (8-bits)   */
+#define FLASH_MODE     0x0001 /**< change mode device is in          */
+#define FLASH_LOCKED   0x0010 /**< return id register (16-bits)      */
+#define FLASH_LOCK     0x0011 /**< put a software lock on a block    */
+#define FLASH_UNLOCK   0x0012 /**< remove a software lock on a block */
+#define FLASH_LOCKDOWN 0x0013 /**< put hardware lock on a block      */
+#define FLASH_ERASE_PREP 0x0014 /**< prepare hardware to be erased   */
+#define FLASH_RESET    0x0015
+
+extern struct flash flashtab[];
+
+/* Prototypes for flash function calls */
+devcall flashInit(struct dentry *);
+devcall flashOpen(struct dentry *, va_list);
+devcall flashRead(struct dentry *, byte *, uint32);
+devcall flashWrite(struct dentry *, byte *, uint32);
+devcall flashSeek(struct dentry *, uint32);
+devcall flashControl(struct dentry *, uint16, int32, int32);
+devcall flashClose(struct dentry *);
+
+/* Prototypes for the Logical Flash Interface */
+devcall logicalRead(struct flash *, byte *, uint32);
+devcall logicalWrite(struct flash *, byte *, uint32);
+struct flash_block logicalMap(struct flash *, uint32);
+
+/* Prototypes for Physical Flash functions */
+devcall physicalRead(struct flash *, struct flash_block *);
+devcall physicalWrite(struct flash *, struct flash_block *);
+devcall physicalErase(struct flash *, struct flash_block *);
+devcall physicalControl(struct flash *, struct flash_block *, byte,
+                        uint32);
+devcall physicalIntelRead(struct flash *, struct flash_block *);
+devcall physicalIntelWrite(struct flash *, struct flash_block *);
+devcall physicalIntelErase(struct flash *, struct flash_block *);
+devcall physicalIntelControl(struct flash *, struct flash_block *, byte,
+                             uint32);
+devcall physicalAMDRead(struct flash *, struct flash_block *);
+
+/* Prototypes for changing OS in flash memory */
+bool validateTrx(struct file *);
+
+/* File function prototypes */
+syscall printFileStats(struct file *, char *, char *, int, int);
+syscall freeFile(struct file *);
+
+#endif                          /* _FLASH_H_ */
diff --git a/include/gpio.h b/include/gpio.h
new file mode 100644
index 0000000..d774ca1
--- /dev/null
+++ b/include/gpio.h
@@ -0,0 +1,154 @@
+/* gpio.h - definintions for the gpio device */
+
+/*
+ * Control and Status Register (CSR) definintions for the GPIO.
+ * The code maps the structure structure directly onto the base address
+ * CSR address for the device.
+ */
+
+/* Number of GPIO devices in the hardware */
+#define NGPIO	4
+
+/* REGISTER BASE */
+#define GPIO1_BASE      (struct gpio_csreg *)0x40011400
+#define GPIO2_BASE      (struct gpio_csreg *)0x40011000
+#define GPIO3_BASE      (struct gpio_csreg *)0x40010C00
+#define GPIO4_BASE      (struct gpio_csreg *)0x40010800
+
+#define SETCFG		0
+#define SETMODE		1
+
+#define INPUT_MODE	0x0
+#define OUTPUT_10MHZ	0x1
+#define	OUTPUT_2MHZ	0x2
+#define OUTPUT_50MHZ	0x3
+
+#define MODE_ANALOG	0x0
+#define	MODE_FLOATING	0x1
+#define	MODE_INPUT	0x2
+
+#define MODE_GENERAL_PUSHPULL	0x0
+#define MODE_GENERAL_OPENDRAIN	0x1
+#define MODE_ALT_PUSHPULL	0x2
+#define MODE_ALT_OPENDRAIN	0x3
+
+#define PIN0	0
+#define PIN1	1
+#define PIN2	2
+#define PIN3	3
+#define PIN4	4
+#define PIN5	5
+#define PIN6	6
+#define PIN7	7
+#define PIN8	8
+#define PIN9	9
+#define PIN10	10
+#define PIN11	11
+#define PIN12	12
+#define PIN13	13
+#define PIN14	14
+#define PIN15	15
+#define PIN16	16
+
+//int gpiowrite(struct dentry * devptr, void * value, uint32_t pinmask);
+//int gpioinit(struct dentry * devptr);
+//int gpiocontrol(struct dentry * devptr, uint32_t, uint32_t, uint32_t);
+
+struct gpio_csreg {
+	volatile uint32 crl;
+	volatile uint32 crh;
+	volatile uint32 idr;
+	volatile uint32 odr;
+	volatile uint32 bsrr;
+	volatile uint32 brr;
+	volatile uint32 lckr;
+};
+
+
+typedef void (*gpiointhook)(uint32, uint32);
+
+struct	gpiocblk	{	/* GPIO control block			*/
+	gpiointhook gphookfn;	/* Interrupt hook function		*/
+};
+
+extern	struct	gpiocblk	gpiotab[];
+
+/* Pin Masks */
+// #define PIN_MASK(pin)	 (1<<pin)
+// #define GPIO_PIN_ALL     0xFFFFFFFF
+// #define GPIO_PIN_00      0x00000001
+// #define GPIO_PIN_01      0x00000002
+// #define GPIO_PIN_02      0x00000004
+// #define GPIO_PIN_03      0x00000008
+// #define GPIO_PIN_04      0x00000010
+// #define GPIO_PIN_05      0x00000020
+// #define GPIO_PIN_06      0x00000040
+// #define GPIO_PIN_07      0x00000080
+// #define GPIO_PIN_08      0x00000100
+// #define GPIO_PIN_09      0x00000200
+// #define GPIO_PIN_10      0x00000400
+// #define GPIO_PIN_11      0x00000800
+// #define GPIO_PIN_12      0x00001000
+// #define GPIO_PIN_13      0x00002000
+// #define GPIO_PIN_14      0x00004000
+// #define GPIO_PIN_15      0x00008000
+// #define GPIO_PIN_16      0x00010000
+// #define GPIO_PIN_17      0x00020000
+// #define GPIO_PIN_18      0x00040000
+// #define GPIO_PIN_19      0x00080000
+// #define GPIO_PIN_20      0x00100000
+// #define GPIO_PIN_21      0x00200000
+// #define GPIO_PIN_22      0x00400000
+// #define GPIO_PIN_23      0x00800000
+// #define GPIO_PIN_24      0x01000000
+// #define GPIO_PIN_25      0x02000000
+// #define GPIO_PIN_26      0x04000000
+// #define GPIO_PIN_27      0x08000000
+// #define GPIO_PIN_28      0x10000000
+// #define GPIO_PIN_29      0x20000000
+// #define GPIO_PIN_30      0x40000000
+// #define GPIO_PIN_31      0x80000000
+// 
+// /* Pin values */
+// #define GPIO_VALUE_LOW		0x00
+// #define GPIO_VALUE_HIGH		0x01
+// 
+// /* Control features */
+// #define GPIO_OUTPUT_DISABLE    	0x00
+// #define GPIO_OUTPUT_ENABLE    	0x01
+// #define GPIO_REG_INT_HANDLER	0x02
+// #define GPIO_INTERRUPT_CTL		0x03
+// #define GPIO_DEB_SET_TIME		0x04
+// #define GPIO_READ_PIN			0x05
+// #define GPIO_WRITE_PIN			0x06
+// 
+// 
+// /* Control Flags */
+// #define GPIO_INT_LINE0_EN 	0x01
+// #define GPIO_INT_LINE1_EN	0x02
+// #define GPIO_INT_RISE_TRIG 	0x04
+// #define GPIO_INT_FALL_TRIG	0x08
+// #define GPIO_INT_LVL0_TRIG 	0x10
+// #define GPIO_INT_LVL1_TRIG	0x20
+// #define GPIO_INT_ALL_LINES 	(GPIO_INT_LINE0_EN|GPIO_INT_LINE1_EN)
+// #define GPIO_INT_ALL_TRIG	(GPIO_INT_RISE_TRIG|GPIO_INT_FALL_TRIG|GPIO_INT_LVL0_TRIG|GPIO_INT_LVL1_TRIG)
+// 
+// 
+// 
+// /* Interrupt vector assignments */
+// 
+// #define GPIO0_INT_A		96
+// #define GPIO0_INT_B		97
+// #define GPIO1_INT_A		98
+// #define GPIO1_INT_B		99
+// #define GPIO2_INT_A		32
+// #define GPIO2_INT_B		33
+// #define GPIO3_INT_A		62
+// #define GPIO3_INT_B		63
+// 
+// /* PRCM Register addresses used for debounce clock */
+// 
+// #define PRCM_FCLK_GPIO1	(uint32 *)0x44E000AC
+// #define PRCM_FCLK_GPIO2	(uint32 *)0x44E000B0
+// #define PRCM_FCLK_GPIO3	(uint32 *)0x44E000B4
+// #define PRCM_FCLK_BIT	(0x1<<18)
diff --git a/include/gpioselect.h b/include/gpioselect.h
new file mode 100644
index 0000000..a5008e1
--- /dev/null
+++ b/include/gpioselect.h
@@ -0,0 +1,160 @@
+/* pinmux.h - pin multiplexing and control for the BBB ZCZ package */
+
+/* Base Register Address for pinmux control */
+
+#define PINMUXBASE			0x44E10800
+
+/* MUX Control Registers */
+#define PIN_CONF_GPMC_AD0		0x00
+#define PIN_CONF_GPMC_AD1		0x01
+#define PIN_CONF_GPMC_AD2		0x02
+#define PIN_CONF_GPMC_AD3		0x03
+#define PIN_CONF_GPMC_AD4		0x04
+#define PIN_CONF_GPMC_AD5		0x05
+#define PIN_CONF_GPMC_AD6		0x06
+#define PIN_CONF_GPMC_AD7		0x07
+#define PIN_CONF_GPMC_AD8		0x08
+#define PIN_CONF_GPMC_AD9		0x09
+#define PIN_CONF_GPMC_AD10		0x0A
+#define PIN_CONF_GPMC_AD11		0x0B
+#define PIN_CONF_GPMC_AD12		0x0C
+#define PIN_CONF_GPMC_AD13		0x0D
+#define PIN_CONF_GPMC_AD14		0x0E
+#define PIN_CONF_GPMC_AD15		0x0F
+#define PIN_CONF_GPMC_A0		0x10
+#define PIN_CONF_GPMC_A1		0x11
+#define PIN_CONF_GPMC_A2		0x12
+#define PIN_CONF_GPMC_A3		0x13
+#define PIN_CONF_GPMC_A4		0x14
+#define PIN_CONF_GPMC_A5		0x15
+#define PIN_CONF_GPMC_A6		0x16
+#define PIN_CONF_GPMC_A7		0x17
+#define PIN_CONF_GPMC_A8		0x18
+#define PIN_CONF_GPMC_A9		0x19
+#define PIN_CONF_GPMC_A10		0x1A
+#define PIN_CONF_GPMC_A11		0x1B
+#define PIN_CONF_GPMC_WAIT0		0x1C
+#define PIN_CONF_GPMC_WPN		0x1D
+#define PIN_CONF_GPMC_BEN1		0x1E
+#define PIN_CONF_GPMC_CSN0		0x1F
+#define PIN_CONF_GPMC_CSN1		0x20
+#define PIN_CONF_GPMC_CSN2		0x21
+#define PIN_CONF_GPMC_CSN3		0x22
+#define PIN_CONF_GPMC_CLK		0x23
+#define PIN_CONF_GPMC_ADVN_ALE		0x24
+#define PIN_CONF_GPMC_OEN_REN		0x25
+#define PIN_CONF_GPMC_WEN		0x26
+#define PIN_CONF_GPMC_BEN0_CLE		0x27
+#define PIN_CONF_LCD_DATA0		0x28
+#define PIN_CONF_LCD_DATA1		0x29
+#define PIN_CONF_LCD_DATA2		0x2A
+#define PIN_CONF_LCD_DATA3		0x2B
+#define PIN_CONF_LCD_DATA4		0x2C
+#define PIN_CONF_LCD_DATA5		0x2D
+#define PIN_CONF_LCD_DATA6		0x2E
+#define PIN_CONF_LCD_DATA7		0x2F
+#define PIN_CONF_LCD_DATA8		0x30
+#define PIN_CONF_LCD_DATA9		0x31
+#define PIN_CONF_LCD_DATA10		0x32
+#define PIN_CONF_LCD_DATA11		0x33
+#define PIN_CONF_LCD_DATA12		0x34
+#define PIN_CONF_LCD_DATA13		0x35
+#define PIN_CONF_LCD_DATA14		0x36
+#define PIN_CONF_LCD_DATA15		0x37
+#define PIN_CONF_LCD_VSYNC		0x38
+#define PIN_CONF_LCD_HSYNC		0x39
+#define PIN_CONF_LCD_PCLK		0x3A
+#define PIN_CONF_LCD_AC_BIAS_EN		0x3B
+#define PIN_CONF_MMC0_DAT3		0x3C
+#define PIN_CONF_MMC0_DAT2		0x3D
+#define PIN_CONF_MMC0_DAT1		0x3E
+#define PIN_CONF_MMC0_DAT0		0x3F
+#define PIN_CONF_MMC0_CLK		0x40
+#define PIN_CONF_MMC0_CMD		0x41
+#define PIN_CONF_MII1_COL		0x42
+#define PIN_CONF_MII1_CRS		0x43
+#define PIN_CONF_MII1_RX_ER		0x44
+#define PIN_CONF_MII1_TX_EN		0x45
+#define PIN_CONF_MII1_RX_DV		0x46
+#define PIN_CONF_MII1_TXD3		0x47
+#define PIN_CONF_MII1_TXD2		0x48
+#define PIN_CONF_MII1_TXD1		0x49
+#define PIN_CONF_MII1_TXD0		0x4A
+#define PIN_CONF_MII1_TX_CLK		0x4B
+#define PIN_CONF_MII1_RX_CLK		0x4C
+#define PIN_CONF_MII1_RXD3		0x4D
+#define PIN_CONF_MII1_RXD2		0x4E
+#define PIN_CONF_MII1_RXD1		0x4F
+#define PIN_CONF_MII1_RXD0		0x50
+#define PIN_CONF_RMII1_REF_CLK		0x51
+#define PIN_CONF_MDIO			0x52
+#define PIN_CONF_MDC			0x53
+#define PIN_CONF_SPI0_SCLK		0x54
+#define PIN_CONF_SPI0_D0		0x55
+#define PIN_CONF_SPI0_D1		0x56
+#define PIN_CONF_SPI0_CS0		0x57
+#define PIN_CONF_SPI0_CS1		0x58
+#define PIN_CONF_ECAP0_IN_PWM0_OUT	0x59
+#define PIN_CONF_UART0_CTSN		0x5A
+#define PIN_CONF_UART0_RTSN		0x5B
+#define PIN_CONF_UART0_RXD		0x5C
+#define PIN_CONF_UART0_TXD		0x5D
+#define PIN_CONF_UART1_CTSN		0x5E
+#define PIN_CONF_UART1_RTSN		0x5F
+#define PIN_CONF_UART1_RXD		0x60
+#define PIN_CONF_UART1_TXD		0x61
+#define PIN_CONF_I2C0_SDA		0x62
+#define PIN_CONF_I2C0_SCL		0x63
+#define PIN_CONF_MCASP0_ACLKX		0x64
+#define PIN_CONF_MCASP0_FSX		0x65
+#define PIN_CONF_MCASP0_AXR0		0x66
+#define PIN_CONF_MCASP0_AHCLKR		0x67
+#define PIN_CONF_MCASP0_ACLKR		0x68
+#define PIN_CONF_MCASP0_FSR		0x69
+#define PIN_CONF_MCASP0_AXR1		0x6A
+#define PIN_CONF_MCASP0_AHCLKX		0x6B
+#define PIN_CONF_XDMA_EVENT_INTR0	0x6C
+#define PIN_CONF_XDMA_EVENT_INTR1	0x6D
+#define PIN_CONF_WARMRSTN		0x6E
+#define PIN_CONF_NNMI			0x70
+#define PIN_CONF_TMS			0x74
+#define PIN_CONF_TDI			0x75
+#define PIN_CONF_TDO			0x76
+#define PIN_CONF_TCK			0x77
+#define PIN_CONF_TRSTN			0x78
+#define PIN_CONF_EMU0			0x79
+#define PIN_CONF_EMU1			0x7A
+#define PIN_CONF_RTC_PWRONRSTN		0x7E
+#define PIN_CONF_PMIC_POWER_EN		0x7F
+#define PIN_CONF_EXT_WAKEUP		0x80
+#define PIN_CONF_USB0_DRVVBUS		0x87
+#define PIN_CONF_USB1_DRVVBUS		0x8D
+
+/* Pin Modes */
+
+#define PIN_MODE_0			0x00
+#define PIN_MODE_1			0x01
+#define PIN_MODE_2			0x02
+#define PIN_MODE_3			0x03
+#define PIN_MODE_4			0x04
+#define PIN_MODE_5			0x05
+#define PIN_MODE_6			0x06
+#define PIN_MODE_7			0x07
+
+
+/* Input Enable Settings */
+
+#define PIN_INPUT_ENABLE		0x20
+#define PIN_INPUT_DISABLE		0x00
+
+/* Slew Rate */
+
+#define PIN_SLEW_FAST			0x00
+#define PIN_SLEW_SLOW			0x40
+
+/* Pull Settings */
+
+#define PIN_PULL_ENABLE			0x00	
+#define PIN_PULL_DISABLE		0x08
+#define PIN_PULL_DOWN			0x00
+#define PIN_PULL_UP			0x10
diff --git a/include/icmp.h b/include/icmp.h
new file mode 100644
index 0000000..87e1474
--- /dev/null
+++ b/include/icmp.h
@@ -0,0 +1,31 @@
+/* icmp.h - definintions for the Internet Control Message Protocol */
+
+#define	ICMP_SLOTS	10		/* num. of open ICMP endpoints	*/
+#define	ICMP_QSIZ	8		/* incoming packets per slot	*/
+
+/* Constants for the state of an entry */
+
+#define	ICMP_FREE	0		/* entry is unused		*/
+#define	ICMP_USED	1		/* entry is being used		*/
+#define	ICMP_RECV	2		/* entry has a process waiting	*/
+
+#define ICMP_HDR_LEN	8		/* bytes in an ICMP header	*/
+
+/* ICMP message types for ping */
+
+#define	ICMP_ECHOREPLY	0		/* ICMP Echo Reply message	*/
+#define ICMP_ECHOREQST	8		/* ICMP Echo Request message	*/
+
+/* table of processes that are waiting for ping replies */
+
+struct	icmpentry {			/* entry in the ICMP table	*/
+	int32	icstate;		/* state of entry: free/used	*/
+	uint32	icremip;		/* remote IP address		*/
+	int32	ichead;			/* index of next packet to read	*/
+	int32	ictail;			/* index of next slot to insert	*/
+	int32	iccount;		/* count of packets enqueued	*/
+	pid32	icpid;			/* ID of waiting process	*/
+	struct	netpacket *icqueue[ICMP_QSIZ];/* circular packet queue	*/
+};
+
+extern	struct	icmpentry icmptab[];	/* table of UDP endpoints	*/
diff --git a/include/icu.h b/include/icu.h
new file mode 100644
index 0000000..2e2f5b2
--- /dev/null
+++ b/include/icu.h
@@ -0,0 +1,9 @@
+/* icu.h */
+
+#define	ICU1	0x20		/* I/O port address, 8259A #1		*/
+#define	ICU2	0xA0		/* I/O port address, 8258A #2		*/
+
+#define	OCR	ICU1		/* Operation Command Register		*/
+#define	IMR	(ICU1+1)	/* Interrupt Mask Register		*/
+
+#define	EOI	0x20		/* non-specific end of interrupt	*/
diff --git a/include/interrupt.h b/include/interrupt.h
new file mode 100644
index 0000000..30510bb
--- /dev/null
+++ b/include/interrupt.h
@@ -0,0 +1,34 @@
+/* interrupt.h */
+
+struct scb_csreg {
+	volatile uint32 cpuid;  
+	volatile uint32 icsr;  
+	volatile uint32 vtor;  
+	volatile uint32 aircr;  
+	volatile uint32 scr;  
+	volatile uint32 ccr;  
+	volatile uint32 shpr1;  
+	volatile uint32 shpr2;  
+	volatile uint32 shpr3;  
+	volatile uint32 shcsr;  
+	volatile uint32 cfcsr;  
+	volatile uint32 hfsr;  
+	volatile uint32 mmar;  
+	volatile uint32 bfar;  
+};
+
+/* System control block base */
+#define SCB_BASE	0xE000ED00
+
+/* Faults enable */
+#define	MPUFAULT_EN	16
+#define	BUSFAULT_EN	17
+#define USAGEFAULT_EN	18
+
+/* Exception vector */
+#define MEMFAULT_ENTRY		4
+#define BUSFAULT_ENTRY		5
+#define USAGEFAULT_ENTRY	6
+#define SVC_ENTRY		11
+#define PENDSV_ENTRY		14
+#define SYSTICK_ENTRY		15
diff --git a/include/ip.h b/include/ip.h
new file mode 100644
index 0000000..0b2aa0f
--- /dev/null
+++ b/include/ip.h
@@ -0,0 +1,25 @@
+/* ip.h  -  Constants related to Internet Protocol version 4 (IPv4) */
+
+#define	IP_BCAST	0xffffffff	/* IP local broadcast address	*/
+#define	IP_THIS		0xffffffff	/* "this host" src IP address	*/
+#define	IP_ALLZEROS	0x00000000	/* The all-zeros IP address     */
+
+#define	IP_ICMP		1		/* ICMP protocol type for IP 	*/
+#define	IP_UDP		17		/* UDP protocol type for IP 	*/
+
+#define	IP_ASIZE	4		/* Bytes in an IP address	*/
+#define	IP_HDR_LEN	20		/* Bytes in an IP header	*/
+#define IP_VH		0x45 		/* IP version and hdr length 	*/
+
+#define	IP_OQSIZ	8		/* Size of IP output queue	*/
+
+/* Queue of outgoing IP packets waiting for ipout process */
+
+struct	iqentry	{
+	int32	iqhead;			/* Index of next packet to send	*/
+	int32	iqtail;			/* Index of next free slot	*/
+	sid32	iqsem;			/* Semaphore that counts pkts	*/
+	struct	netpacket *iqbuf[IP_OQSIZ];/* Circular packet queue	*/
+};
+
+extern	struct	iqentry	ipoqueue;	/* Network output queue		*/
diff --git a/include/kernel.h b/include/kernel.h
new file mode 100644
index 0000000..dc5dfc5
--- /dev/null
+++ b/include/kernel.h
@@ -0,0 +1,95 @@
+/* kernel.h */
+
+/* General type declarations used throughout the kernel */
+
+typedef	unsigned char	byte;
+typedef	unsigned char	uint8;
+typedef	int		int32;
+typedef	short		int16;
+typedef	unsigned int	uint32;
+typedef	unsigned short	uint16;
+typedef	unsigned long long uint64;
+
+/* Xinu-specific types */
+
+// RAFA typedef	int32	sid32;		/* semaphore ID				*/
+// RAFA typedef	int16	qid16;		/* queue ID				*/
+// RAFA typedef	int32	pid32;		/* process ID				*/
+// RAFA typedef	int32	did32;		/* device ID				*/
+// RAFA typedef	int16	pri16;		/* process priority			*/
+// RAFA typedef	uint32	umsg32;		/* message passed among processes	*/
+// RAFA typedef	int32	bpid32;		/* buffer pool ID			*/
+// RAFA typedef	byte	bool8;		/* Boolean type				*/
+// RAFA typedef	uint32	intmask;	/* saved interrupt mask			*/
+// RAFA typedef	int32	ibid32;		/* index block ID (used in file system)	*/
+// RAFA typedef	int32	dbid32;		/* data block ID (used in file system)	*/
+// RAFA typedef	int32	uid32;		/* ID for UDP table descriptor		*/
+
+typedef	char	sid32;		/* semaphore ID				*/
+typedef	char	qid16;		/* queue ID				*/
+typedef	char	pid32;		/* process ID				*/
+typedef	char	did32;		/* device ID				*/
+typedef	char	pri16;		/* process priority			*/
+typedef	char	umsg32;		/* message passed among processes	*/
+typedef	char	bpid32;		/* buffer pool ID			*/
+typedef	byte	bool8;		/* Boolean type				*/
+typedef	char	intmask;	/* saved interrupt mask			*/
+typedef	char	ibid32;		/* index block ID (used in file system)	*/
+typedef	char	dbid32;		/* data block ID (used in file system)	*/
+typedef	char	uid32;		/* ID for UDP table descriptor		*/
+
+/* Function declaration return types */
+
+// RAFA typedef int32	syscall;	/* system call declaration		*/
+// RAFA typedef int32	devcall;	/* device call declaration		*/
+// RAFA typedef int32	shellcmd;	/* shell command declaration		*/
+// RAFA typedef int32	process;	/* top-level function of a process	*/
+// RAFA typedef	void	interrupt;	/* interrupt procedure			*/
+// RAFA typedef	int32	status;		/* returned status value (OK/SYSERR)	*/
+
+typedef char	syscall;	/* system call declaration		*/
+typedef char	devcall;	/* device call declaration		*/
+typedef char	shellcmd;	/* shell command declaration		*/
+typedef char	process;	/* top-level function of a process	*/
+typedef	void	interrupt;	/* interrupt procedure			*/
+typedef	char	status;		/* returned status value (OK/SYSERR)	*/
+
+#define local	static		/* Local procedure or variable declar.	*/
+
+/* Boolean constants */
+
+#define FALSE	0		/* Boolean False			*/
+#define TRUE	1		/* Boolean True				*/
+
+/* Null pointer, character, and string definintions */
+
+#define NULL	0		/* null pointer for linked lists	*/
+#define NULLCH	'\0'		/* null character			*/
+#define	NULLSTR	""		/* null string				*/
+
+/* Universal return constants */
+
+#define OK	( 1)		/* normal system call return		*/
+#define	SYSERR	(-1)		/* system call failed			*/
+#define	EOF	(-2)		/* End-of-file (usually from read)	*/
+#define	TIMEOUT	(-3)		/* system call timed out		*/
+
+extern	qid16	readylist;	/* global ID for list of ready processes*/
+
+// RAFA #define	MINSTK	400		/* minimum stack size in bytes		*/
+#define	MINSTK	100		/* minimum stack size in bytes		*/
+
+#define	CONTEXT	64		/* bytes in a function call context on	*/
+				/* the run-time stack			*/
+#define	QUANTUM	1		/* time slice in milliseconds		*/
+
+/* Size of the stack for the null process */
+
+// #define	NULLSTK		4096	/* stack size for null process		*/
+#define	NULLSTK		256	/* stack size for null process		*/
+
+/* Prototypes of I/O functions used throughout the kernel */
+
+syscall	kprintf(char *fmt, ...);
+syscall	kputc(byte);
+syscall	kgetc(void);
diff --git a/include/lfilesys.h b/include/lfilesys.h
new file mode 100644
index 0000000..8cf7fe5
--- /dev/null
+++ b/include/lfilesys.h
@@ -0,0 +1,176 @@
+/* lfilesys.h - ib2sect, ib2disp */
+
+/************************************************************************/
+/*									*/
+/*               Local File System Data Structures			*/
+/*									*/
+/*   A local file system uses a random-access disk composed of 512-byte	*/
+/* sectors numbered 0 through N-1.  We assume disk hardware can read or	*/
+/* write any sector at random, but must transfer an entire sector.	*/
+/* Thus, to write a few bytes, the file system must read the sector,	*/
+/* replace the bytes, and then write the sector back to disk.  Xinu's	*/
+/* local file system divides the disk as follows: sector 0 is a 	*/
+/* directory, the next K sectors constitute an index area, and the	*/
+/* remaining sectors comprise a data area. The data area is easiest to	*/
+/* understand: each sector holds one data block (d-block) that stores	*/
+/* contents from one of the files (or is on a free list of unused data	*/
+/* blocks).  We think of the index area as holding an array of index	*/
+/* blocks (i-blocks) numbered 0 through I-1.  A given sector in the	*/
+/* index area holds 7 of the index blocks, which are each 72 bytes	*/
+/* long.  Given an i-block number, the file system must calculate the	*/
+/* disk sector in which the i-block is located and the byte offset	*/
+/* within the sector at which the i-block resides.  Internally, a file	*/
+/* is known by the i-block index of the first i-block for the file.	*/
+/* The directory contains a list of file names and the	i-block number	*/
+/* of the first i-block for the file.  The directory also holds the	*/
+/* i-block number for a list of free i-blocks and a data block number	*/
+/* of the first data block on a list of free data blocks.		*/
+/*									*/
+/************************************************************************/
+
+#ifndef	Nlfl
+#define	Nlfl	1
+#endif
+
+/* Use the remote disk device if no disk is defined (file system  */
+/*  *assumes* the underlying disk has a block size of 512 bytes)  */
+
+#ifndef	LF_DISK_DEV
+#define	LF_DISK_DEV	SYSERR
+#endif
+
+#define	LF_MODE_R	F_MODE_R	/* Mode bit for "read"		*/
+#define	LF_MODE_W	F_MODE_W	/* Mode bit for "write"		*/
+#define	LF_MODE_RW	F_MODE_RW	/* Mode bits for "read or write"*/
+#define	LF_MODE_O	F_MODE_O	/* Mode bit for "old"		*/
+#define	LF_MODE_N	F_MODE_N	/* Mode bit for "new"		*/
+
+#define	LF_BLKSIZ	512		/* Assumes 512-byte disk blocks	*/
+#define	LF_NAME_LEN	16		/* Length of name plus null	*/
+#define	LF_NUM_DIR_ENT	20		/* Num. of files in a directory	*/
+
+#define	LF_FREE		0		/* Slave device is available	*/
+#define	LF_USED		1		/* Slave device is in use	*/
+
+#define	LF_INULL	(ibid32) -1	/* Index block null pointer	*/
+#define	LF_DNULL	(dbid32) -1	/* Data block null pointer	*/
+#define	LF_IBLEN	16		/* Data block ptrs per i-block	*/
+#define	LF_IDATA	8192		/* Bytes of data indexed by a	*/
+					/*   single index block		*/
+#define	LF_IMASK	0x00001fff	/* Mask for the data indexed by	*/
+					/*   one index block (i.e.,	*/
+					/*   bytes 0 through 8191).	*/
+#define	LF_DMASK	0x000001ff	/* Mask for the data in a data	*/
+					/*   block (0 through 511)	*/
+
+#define	LF_AREA_IB	1		/* First sector of i-blocks	*/
+#define	LF_AREA_DIR	0		/* First sector of directory	*/
+
+/* Structure of an index block on disk */
+
+struct	lfiblk		{		/* Format of index block	*/
+	ibid32		ib_next;	/* Address of next index block	*/
+	uint32		ib_offset;	/* First data byte of the file	*/
+					/*  Indexed by this i-block	*/
+	dbid32		ib_dba[LF_IBLEN];/* Ptrs to data blocks indexed	*/
+};
+
+/* File System ID */
+
+#define	LFS_ID		0x58696E75	/* ID for Xinu Local File System*/
+
+/* Conversion functions below assume 7 index blocks per disk block */
+
+/* Conversion between index block number and disk sector number */
+
+#define	ib2sect(ib)	(((ib)/7)+LF_AREA_IB)
+
+/* Conversion between index block number and the relative offset within	*/
+/*	a disk sector							*/
+
+#define	ib2disp(ib)	(((ib)%7)*sizeof(struct lfiblk))
+
+
+/* Structure used in each directory entry for the local file system */
+
+struct	ldentry	{			/* Description of entry for one	*/
+					/*   file in the directory	*/
+	uint32	ld_size;		/* Curr. size of file in bytes	*/
+	ibid32	ld_ilist;		/* ID of first i-block for file	*/
+					/*   or IB_NULL for empty file	*/
+	char	ld_name[LF_NAME_LEN];	/* Null-terminated file name	*/
+};
+
+/* Structure of a data block when on the free list on disk */
+
+struct	lfdbfree {
+	dbid32	lf_nextdb;		/* Next data block on the list	*/
+	char	lf_unused[LF_BLKSIZ - sizeof(dbid32)];
+};
+
+/* Format of the file system directory, either on disk or in memory */
+
+#pragma pack(2)
+struct	lfdir	{			/* Entire directory on disk	*/
+	uint32	lfd_fsysid;		/* File system ID		*/
+	int16	lfd_vers;		/* File system version		*/
+	int16	lfd_subvers;		/* File system subversion	*/
+	uint32	lfd_allzeros;		/* All 0 bits			*/
+	uint32	lfd_allones;		/* All 1 bits			*/
+	dbid32	lfd_dfree;		/* List of free d-blocks on disk*/
+	ibid32	lfd_ifree;		/* List of free i-blocks on disk*/
+	int32	lfd_nfiles;		/* Current number of files	*/
+	struct	ldentry lfd_files[LF_NUM_DIR_ENT]; /* Set of files	*/
+	uint32	lfd_revid;		/* fsysid in reverse byte order	*/
+};
+#pragma pack()
+
+/* Global data used by local file system */
+
+struct	lfdata	{			/* Local file system data	*/
+	did32	lf_dskdev;		/* Device ID of disk to use	*/
+	sid32	lf_mutex;		/* Mutex for the directory and	*/
+					/*   index/data free lists	*/
+	struct	lfdir	lf_dir;		/* In-memory copy of directory	*/
+	bool8	lf_dirpresent;		/* True when directory is in	*/
+					/*   memory (1st file is open)	*/
+	bool8	lf_dirdirty;		/* Has the directory changed?	*/
+};
+
+/* Control block for local file pseudo-device */
+
+struct	lflcblk	{			/* Local file control block	*/
+					/*   (one for each open file)	*/
+	byte	lfstate;		/* Is entry free or used	*/
+	did32	lfdev;			/* Device ID of this device	*/
+	sid32	lfmutex;		/* Mutex for this file		*/
+	struct	ldentry	*lfdirptr;	/* Ptr to file's entry in the	*/
+					/*   in-memory directory	*/
+	int32	lfmode;			/* Mode (read/write/both)	*/
+	uint32	lfpos;			/* Byte position of next byte	*/
+					/*   to read or write		*/
+	char	lfname[LF_NAME_LEN];	/* Name of the file		*/
+	ibid32	lfinum;			/* ID of current index block in	*/
+					/*   lfiblock or LF_INULL	*/
+	struct	lfiblk	lfiblock;	/* In-mem copy of current index	*/
+					/*   block			*/
+	dbid32	lfdnum;			/* Number of current data block	*/
+					/*   in lfdblock or LF_DNULL	*/
+	char	lfdblock[LF_BLKSIZ];	/* In-mem copy of current data	*/
+					/*   block			*/
+	char	*lfbyte;		/* Ptr to byte in lfdblock or	*/
+					/*   address one beyond lfdblock*/
+					/*   if current file pos lies	*/
+					/*   outside lfdblock		*/
+	bool8	lfibdirty;		/* Has lfiblock changed?	*/
+	bool8	lfdbdirty;		/* Has lfdblock changed?	*/
+};
+
+extern	struct	lfdata	Lf_data;
+extern	struct	lflcblk	lfltab[];
+
+/* Control functions */
+
+#define	LF_CTL_DEL	F_CTL_DEL	/* Delete a file		*/
+#define	LF_CTL_TRUNC	F_CTL_TRUNC	/* Truncate a file		*/
+#define LF_CTL_SIZE	F_CTL_SIZE	/* Obtain the size of a file	*/
diff --git a/include/limits.h b/include/limits.h
new file mode 100644
index 0000000..ed3a1cc
--- /dev/null
+++ b/include/limits.h
@@ -0,0 +1,30 @@
+/**
+ * @file limits.h
+ *
+ * $Id: limits.h 2020 2009-08-13 17:50:08Z mschul $
+ */
+/* Embedded Xinu, Copyright (C) 2009.  All rights reserved. */
+
+#ifndef _LIMITS_H_
+#define _LIMITS_H_
+
+#define CHAR_BIT  8             /**< bits in a char                     */
+#define CHAR_MAX  127           /**< maximum value of char              */
+#define CHAR_MIN  (-128)        /**< minimum value of char              */
+#define SCHAR_MAX 127           /**< maximum value of signed char       */
+#define SCHAR_MIN (-128)        /**< minimum value of signed char       */
+#define UCHAR_MAX 255           /**< maximum value of unsigned char     */
+
+#define INT_MAX   2147483647    /**< maximum value of int               */
+#define INT_MIN   (-INT_MAX-1)  /**< minimum value of int               */
+#define UINT_MAX  (2U*INT_MAX+1) /**< maximum value of unsigned int     */
+
+#define LONG_MAX  2147483647    /**< maximum value of int32              */
+#define LONG_MIN  (-LONG_MAX-1) /**< minimum value of int32              */
+#define ULONG_MAX (2UL*LONG_MAX+1) /**< maximum value of unsigned int32  */
+
+#define SHRT_MAX  32767         /**< maximum value of int16             */
+#define SHRT_MIN  (-SHRT_MAX-1) /**< minimum value of int16             */
+#define USHRT_MAX  65535        /**< maximum value of unsigned int16    */
+
+#endif                          /* _LIMITS_H_ */
diff --git a/include/mark.h b/include/mark.h
new file mode 100644
index 0000000..2579015
--- /dev/null
+++ b/include/mark.h
@@ -0,0 +1,16 @@
+/* mark.h - notmarked */
+
+#define	MAXMARK	20		/* Maximum number of marked locations	*/
+
+extern	int32	*(marks[]);
+extern	int32	nmarks;
+extern	sid32	mkmutex;
+typedef	int32	memmark[1];	/* Declare a memory mark to be an array	*/
+				/*   so user can reference the name	*/
+				/*   without a leading &		*/
+
+/*------------------------------------------------------------------------
+ *  notmarked  -  Return nonzero if a location has not been marked
+ *------------------------------------------------------------------------
+ */
+#define	notmarked(L)		(L[0]<0 || L[0]>=nmarks || marks[L[0]]!=L)
diff --git a/include/memory.h b/include/memory.h
new file mode 100644
index 0000000..fce2cfc
--- /dev/null
+++ b/include/memory.h
@@ -0,0 +1,38 @@
+/* memory.h - roundmb, truncmb, freestk */
+
+#define	PAGE_SIZE	1024 // TODO: unused?
+
+/*----------------------------------------------------------------------
+ * roundmb, truncmb - Round or truncate address to memory block size
+ *----------------------------------------------------------------------
+ */
+#define	roundmb(x)	(char *)( (7 + (uint32)(x)) & (~7) )
+#define	truncmb(x)	(char *)( ((uint32)(x)) & (~7) )
+
+/*----------------------------------------------------------------------
+ *  freestk  --  Free stack memory allocated by getstk
+ *----------------------------------------------------------------------
+ */
+#define	freestk(p,len)	freemem((char *)((uint32)(p)		\
+				- ((uint32)roundmb(len))	\
+				+ (uint32)sizeof(uint32)),	\
+				(uint32)roundmb(len) )
+
+struct	memblk	{			/* See roundmb & truncmb	*/
+	struct	memblk	*mnext;		/* Ptr to next free memory blk	*/
+	uint32	mlength;		/* Size of blk (includes memblk)*/
+	};
+extern	struct	memblk	memlist;	/* Head of free memory list	*/
+extern	void	*minheap;		/* Start of heap		*/
+extern	void	*maxheap;		/* Highest valid heap address	*/
+
+
+/* Added by linker */
+
+// extern	uint32	text;			/* Start of text segment	*/
+// extern	uint32	etext;			/* End of text segment		*/
+// extern	uint32	data;			/* Start of data segment	*/
+// extern	uint32	edata;			/* End of data segment		*/
+// extern	uint32	bss;			/* Start of bss segment		*/
+// extern	uint32	ebss;			/* End of bss segment		*/
+// extern	uint32	end;			/* End of program		*/
diff --git a/include/messages.h b/include/messages.h
new file mode 100644
index 0000000..778fce6
--- /dev/null
+++ b/include/messages.h
@@ -0,0 +1,14 @@
+
+typedef unsigned int size_t;
+#include <avr/pgmspace.h>
+
+
+extern const char m1[];
+extern const char m2[];
+extern const char m3[];
+extern const char m4[];
+extern const char m5[];
+extern const char m6[];
+
+
+
diff --git a/include/name.h b/include/name.h
new file mode 100644
index 0000000..75af45f
--- /dev/null
+++ b/include/name.h
@@ -0,0 +1,22 @@
+/* name.h */
+
+/* Constants that define the namespace mapping table sizes */
+
+// RAFA #define	NM_PRELEN	64		/* Max size of a prefix string	*/
+#define	NM_PRELEN	8		/* Max size of a prefix string	*/
+// RAFA #define	NM_REPLLEN	96		/* Maximum size of a replacement*/
+#define	NM_REPLLEN	8		/* Maximum size of a replacement*/
+#define	NM_MAXLEN	8		/* Maximum size of a file name	*/
+// RAFA #define	NNAMES		40		/* Number of prefix definitions	*/
+#define	NNAMES		3		/* Number of prefix definitions	*/
+
+/* Definition of the name prefix table that defines all name mappings */
+
+struct	nmentry	{			/* Definition of prefix table	*/
+	char	nprefix[NM_PRELEN];	/* Null-terminated prefix	*/
+	char	nreplace[NM_REPLLEN];	/* Null-terminated replacement	*/
+	did32	ndevice;		/* Device descriptor for prefix	*/
+};
+
+extern	struct	nmentry	nametab[];	/* Table of name mappings	*/
+extern	int32	nnames;			/* Number of entries allocated	*/
diff --git a/include/net.h b/include/net.h
new file mode 100644
index 0000000..dd978bf
--- /dev/null
+++ b/include/net.h
@@ -0,0 +1,69 @@
+/* net.h */
+
+#define NETSTK		8192 		/* Stack size for network setup */
+#define NETPRIO		500    		/* Network startup priority 	*/
+#define NETBOOTFILE	128		/* Size of the netboot filename	*/
+
+/* Constants used in the networking code */
+
+#define	ETH_ARP     0x0806		/* Ethernet type for ARP	*/
+#define	ETH_IP      0x0800		/* Ethernet type for IP		*/
+#define	ETH_IPv6    0x86DD		/* Ethernet type for IPv6	*/
+
+/* Format of an Ethernet packet carrying IPv4 and UDP */
+
+#pragma pack(2)
+struct	netpacket	{
+	byte	net_ethdst[ETH_ADDR_LEN];/* Ethernet dest. MAC address	*/
+	byte	net_ethsrc[ETH_ADDR_LEN];/* Ethernet source MAC address	*/
+	uint16	net_ethtype;		/* Ethernet type field		*/
+	byte	net_ipvh;		/* IP version and hdr length	*/
+	byte	net_iptos;		/* IP type of service		*/
+	uint16	net_iplen;		/* IP total packet length	*/
+	uint16	net_ipid;		/* IP datagram ID		*/
+	uint16	net_ipfrag;		/* IP flags & fragment offset	*/
+	byte	net_ipttl;		/* IP time-to-live		*/
+	byte	net_ipproto;		/* IP protocol (actually type)	*/
+	uint16	net_ipcksum;		/* IP checksum			*/
+	uint32	net_ipsrc;		/* IP source address		*/
+	uint32	net_ipdst;		/* IP destination address	*/
+	union {
+	 struct {
+	  uint16 	net_udpsport;	/* UDP source protocol port	*/
+	  uint16	net_udpdport;	/* UDP destination protocol port*/
+	  uint16	net_udplen;	/* UDP total length		*/
+	  uint16	net_udpcksum;	/* UDP checksum			*/
+	  byte		net_udpdata[1500-28];/* UDP payload (1500-above)*/
+	 };
+	 struct {
+	  byte		net_ictype;	/* ICMP message type		*/
+	  byte		net_iccode;	/* ICMP code field (0 for ping)	*/
+	  uint16	net_iccksum;	/* ICMP message checksum	*/
+	  uint16	net_icident; 	/* ICMP identifier		*/
+	  uint16	net_icseq;	/* ICMP sequence number		*/
+	  byte		net_icdata[1500-28];/* ICMP payload (1500-above)*/
+	 };
+	};
+};
+#pragma pack()
+
+#define	PACKLEN	sizeof(struct netpacket)
+
+extern	bpid32	netbufpool;		/* ID of net packet buffer pool	*/
+
+struct	network	{			/* Network information		*/
+	uint32	ipucast;		/* Computer's IP unicast address*/
+	uint32	ipbcast;		/* IP broadcast address		*/
+	uint32	ipmask;			/* IP address mask		*/
+	uint32	ipprefix;		/* IP (network) prefix		*/
+	uint32	iprouter;		/* Default router address	*/
+	uint32	bootserver;		/* Boot server address		*/
+	uint32	dnsserver;		/* DNS server address		*/
+	uint32	ntpserver;		/* NTP (time) server address	*/
+	bool8	ipvalid;		/* nonzero => above are valid	*/
+	byte	ethucast[ETH_ADDR_LEN];	/* Ethernet multicast address	*/
+	byte	ethbcast[ETH_ADDR_LEN];	/* Ethernet broadcast address	*/
+	char	bootfile[NETBOOTFILE];	/* Name of boot file		*/
+};
+
+extern	struct	network NetData;	/* Local Network Interface info	*/
diff --git a/include/ports.h b/include/ports.h
new file mode 100644
index 0000000..ce42043
--- /dev/null
+++ b/include/ports.h
@@ -0,0 +1,31 @@
+/* ports.h - isbadport */
+
+// RAFA #define	NPORTS		30		/* Maximum number of ports	*/
+#define	NPORTS		3		/* Maximum number of ports	*/
+// RAFA #define	PT_MSGS		100		/* Total messages in system	*/
+#define	PT_MSGS		10		/* Total messages in system	*/
+#define	PT_FREE		1		/* Port is free			*/
+#define	PT_LIMBO	2		/* Port is being deleted/reset	*/
+#define	PT_ALLOC	3		/* Port is allocated		*/
+
+struct	ptnode	{			/* Node on list of messages 	*/
+	uint32	ptmsg;			/* A one-word message		*/
+	struct	ptnode	*ptnext;	/* Pointer to next node on list	*/
+};
+
+struct	ptentry	{			/* Entry in the port table	*/
+	sid32	ptssem;			/* Sender semaphore		*/
+	sid32	ptrsem;			/* Receiver semaphore		*/
+	uint16	ptstate;		/* Port state (FREE/LIMBO/ALLOC)*/
+	uint16	ptmaxcnt;		/* Max messages to be queued	*/
+	int32	ptseq;			/* Sequence changed at creation	*/
+	struct	ptnode	*pthead;	/* List of message pointers	*/
+	struct	ptnode	*pttail;	/* Tail of message list		*/
+};
+
+extern	struct	ptnode	*ptfree;	/* List of free nodes		*/
+extern	struct	ptentry	porttab[];	/* Port table			*/
+extern	int32	ptnextid;		/* Next port ID to try when	*/
+					/*   looking for a free slot	*/
+
+#define	isbadport(portid)	( (portid)<0 || (portid)>=NPORTS )
diff --git a/include/process.h b/include/process.h
new file mode 100644
index 0000000..245deb9
--- /dev/null
+++ b/include/process.h
@@ -0,0 +1,63 @@
+/* process.h - isbadpid */
+
+/* Maximum number of processes in the system */
+
+#ifndef NPROC
+#define	NPROC		8
+#endif		
+
+/* Process state constants */
+
+#define	PR_FREE		0	/* Process table entry is unused	*/
+#define	PR_CURR		1	/* Process is currently running		*/
+#define	PR_READY	2	/* Process is on ready queue		*/
+#define	PR_RECV		3	/* Process waiting for message		*/
+#define	PR_SLEEP	4	/* Process is sleeping			*/
+#define	PR_SUSP		5	/* Process is suspended			*/
+#define	PR_WAIT		6	/* Process is on semaphore queue	*/
+#define	PR_RECTIM	7	/* Process is receiving with timeout	*/
+
+/* Miscellaneous process definitions */
+
+#define	PNMLEN		16	/* Length of process "name"		*/
+#define	NULLPROC	0	/* ID of the null process		*/
+
+/* Process initialization constants */
+
+// #define	INITSTK		4096	/* Initial process stack size		*/
+#define	INITSTK		1024	/* Initial process stack size		*/
+#define	INITPRIO	20	/* Initial process priority		*/
+#define	INITRET		userret	/* Address to which process returns	*/
+
+/* Inline code to check process ID (assumes interrupts are disabled)	*/
+
+#define	isbadpid(x)	( ((pid32)(x) < 0) || \
+			  ((pid32)(x) >= NPROC) || \
+			  (proctab[(x)].prstate == PR_FREE))
+
+/* Number of device descriptors a process can have open */
+
+#define NDESC		5	/* must be odd to make procent 4N bytes	*/
+
+/* Definition of the process table (multiple of 32 bits) */
+
+struct procent {		/* Entry in the process table		*/
+	uint16	prstate;	/* Process state: PR_CURR, etc.		*/
+	pri16	prprio;		/* Process priority			*/
+	char	*prstkptr;	/* Saved stack pointer			*/
+	char	*prstkbase;	/* Base of run time stack		*/
+	uint32	prstklen;	/* Stack length in bytes		*/
+	char	prname[PNMLEN];	/* Process name				*/
+	sid32	prsem;		/* Semaphore on which process waits	*/
+	pid32	prparent;	/* ID of the creating process		*/
+	umsg32	prmsg;		/* Message sent to this process		*/
+	bool8	prhasmsg;	/* Nonzero iff msg is valid		*/
+	int16	prdesc[NDESC];	/* Device descriptors for process	*/
+};
+
+/* Marker for the top of a process stack (used to help detect overflow)	*/
+#define	STACKMAGIC	0x0A0AAAA9
+
+extern	struct	procent proctab[];
+extern	int32	prcount;	/* Currently active processes		*/
+extern	pid32	currpid;	/* Currently executing process		*/
diff --git a/include/prototypes.h b/include/prototypes.h
new file mode 100644
index 0000000..a04ff02
--- /dev/null
+++ b/include/prototypes.h
@@ -0,0 +1,633 @@
+/* in file addargs.c */
+extern	status	addargs(pid32, int32, int32[], int32,char *, void *);
+
+/* in file am335x_eth_init.c */
+extern	int32	am335x_eth_init(struct ethcblk *);
+
+/* in file arp.c */
+extern	void	arp_init(void);
+extern	status	arp_resolve(uint32, byte[]);
+extern	void	arp_in(struct arppacket *);
+extern	int32	arp_alloc(void);
+extern	void	arp_ntoh(struct arppacket *);
+extern	void	arp_hton(struct arppacket *);
+
+/* in file ascdate.c */
+extern	status	ascdate(uint32, char *);
+
+/* in file bufinit.c */
+extern	status	bufinit(void);
+
+/* in file chprio.c */
+extern	pri16	chprio(pid32, pri16);
+
+/* in file clkupdate.S */
+extern	uint32	clkcount(void);
+
+/* in file clkhandler.c */
+extern	interrupt clkhandler(void);
+
+/* in file clkinit.c */
+extern	void	clkinit(void);
+
+/* in file clkint.S */
+extern	void	clkint(void);
+
+/* in file close.c */
+extern	syscall	close(did32);
+
+/* in file control.c */
+extern	syscall	control(did32, int32, int32, int32);
+
+/* in file create.c */
+extern	pid32	create(void *, uint32, pri16, char *, uint32, ...);
+
+/* in file ctxsw.S */
+extern	void	ctxsw(void *, void *);
+
+/* in file dhcp.c */
+extern	uint32	getlocalip(void);
+
+/* in file dns.c */
+extern	uint32	dnslookup(char *);
+
+/* in file dot2ip.c */
+extern	uint32	dot2ip(char *, uint32 *);
+
+/* in file ethcontrol.c */
+extern	int32	ethcontrol(struct dentry *, int32, int32, int32);
+
+/* in file ethinit.c */
+extern 	int32	ethinit(struct dentry *);
+
+/* in file ethhandler.c */
+extern	interrupt ethhandler(uint32);
+
+/* in file ethread.c */
+extern	int32	ethread(struct dentry *, void *, uint32);
+
+/* in file ethwrite.c */
+extern	int32	ethwrite(struct dentry *, void *, uint32);
+
+/* in file evec.c */
+
+extern	int32	initintc(void);
+extern	int32	initevec(void);
+extern	int32	set_evec(uint32, uint32);
+extern	void	trap(int32);
+
+/* in file exception.c */
+extern  void exception(int32, int32*);
+
+/* in file freebuf.c */
+extern	syscall	freebuf(char *);
+
+/* in file freemem.c */
+extern	syscall	freemem(char *, uint32);
+
+/* in file getbuf.c */
+extern	char	*getbuf(bpid32);
+
+/* in file getc.c */
+extern	syscall	getc(did32);
+
+/* in file getitem.c */
+extern	pid32	getfirst(qid16);
+extern	pid32	getlast(qid16);
+extern	pid32	getitem(pid32);
+
+/* in file getmem.c */
+extern	char	*getmem(uint32);
+
+/* in file getpid.c */
+extern	pid32	getpid(void);
+
+/* in file getprio.c */
+extern	syscall	getprio(pid32);
+
+/* in file getstk.c */
+extern	char	*getstk(uint32);
+
+/* in file getticks.c */
+extern	uint32	getticks(void);
+
+/* in file gettime.c */
+extern	status	gettime(uint32 *);
+
+/* in file getutime.c */
+extern	status	getutime(uint32 *);
+
+/* in file gpiocontrol.c */
+extern	devcall	gpiocontrol(struct dentry *, int32, int32, int32);
+
+/* in file gpiohandler.c */
+extern	void	gpiohandler(uint32);
+
+/* in file gpioinit.c */
+extern	devcall	gpioinit(struct dentry *);
+
+/* in file gpioselect.c */
+extern devcall gpioselect(uint32, uint32, uint32);
+
+/* in file gpioread.c */
+extern	devcall	gpioread(struct dentry *,char *, int32);
+
+/* in file gpiowrite.c */
+extern	devcall	gpiowrite(struct dentry *,  char *, int32);
+
+/* in file halt.S */
+extern	void	halt(void);
+
+/* in file icmp.c */
+
+extern	void	icmp_init(void);
+extern	void	icmp_in(struct netpacket *);
+extern	int32	icmp_register(uint32);
+extern	int32	icmp_recv(int32, char *, int32, uint32);
+extern	status	icmp_send(uint32, uint16, uint16, uint16, char *, int32);
+extern	struct	netpacket *icmp_mkpkt(uint32, uint16, uint16, uint16, char *, int32);
+extern	status	icmp_release(int32);
+extern	uint16	icmp_cksum(char *, int32);
+extern	void	icmp_hton(struct netpacket *);
+extern	void	icmp_ntoh(struct netpacket *);
+
+/* in file init.c */
+extern	syscall	init(did32);
+
+/* in file insert.c */
+extern	status	insert(pid32, qid16, int32);
+
+/* in file insertd.c */
+extern	status	insertd(pid32, qid16, int32);
+
+/* in file intr.S */
+extern	intmask	disable(void);
+extern	void	enable(void);
+
+/* in file ioerr.c */
+extern	devcall	ioerr(void);
+
+/* in file ionull.c */
+extern	devcall	ionull(void);
+
+/* in file ip.c */
+extern	void	ip_in(struct netpacket *);
+extern	status	ip_send(struct netpacket *);
+extern	void	ip_local(struct netpacket *);
+extern	status	ip_out(struct netpacket *);
+extern	int32	ip_route(uint32);
+extern	uint16	ipcksum(struct netpacket *);
+extern	void	ip_ntoh(struct netpacket *);
+extern	void	ip_hton(struct netpacket *);
+extern	process	ipout(void);
+extern	status	ip_enqueue(struct netpacket *);
+
+/* in file net.c */
+extern	void	net_init(void);
+extern	process	netin(void);
+extern	process	netout(void);
+extern	process	rawin(void);
+extern	void	eth_hton(struct netpacket *);
+extern	void	eth_ntoh(struct netpacket *);
+extern	uint16	getport(void);
+
+/* in file kill.c */
+extern	syscall	kill(pid32);
+
+/* in file lexan.c */
+extern	int32	lexan(char *, int32, char *, int32 *, int32 [], int32 []);
+
+/* in file lfibclear.c */
+extern	void	lfibclear(struct lfiblk *, int32);
+
+/* in file lfibget.c */
+extern	void	lfibget(did32, ibid32, struct lfiblk *);
+
+/* in file lfibput.c */
+extern	status	lfibput(did32, ibid32, struct lfiblk *);
+
+/* in file lfdbfree.c */
+extern	status	lfdbfree(did32, dbid32);
+
+/* in file lfdballoc.c */
+extern	dbid32	lfdballoc(struct lfdbfree *);
+
+/* in file lfflush.c */
+extern	status	lfflush(struct lflcblk *);
+
+/* in file lfgetmode.c */
+extern	int32	lfgetmode(char *);
+
+/* in file lfiballoc.c */
+extern	ibid32	lfiballoc(void);
+
+/* in file lflclose.c */
+extern	devcall	lflclose(struct dentry *);
+
+/* in file lflcontrol.c */
+extern	devcall	lflcontrol(struct dentry *, int32, int32, int32);
+
+/* in file lflgetc.c */
+extern	devcall	lflgetc(struct dentry *);
+
+/* in file lflinit.c */
+extern	devcall	lflinit(struct dentry *);
+
+/* in file lflputc.c */
+extern	devcall	lflputc(struct dentry *, char);
+
+/* in file lflread.c */
+extern	devcall	lflread(struct dentry *, char *, int32);
+
+/* in file lflseek.c */
+extern	devcall	lflseek(struct dentry *, uint32);
+
+/* in file lflwrite.c */
+extern	devcall	lflwrite(struct dentry *, char *, int32);
+
+/* in file lfscheck.c */
+extern	status	lfscheck(struct lfdir *);
+
+/* in file lfscreate.c */
+extern  status  lfscreate(did32, ibid32, uint32);
+
+/* in file lfsinit.c */
+extern	devcall	lfsinit(struct dentry *);
+
+/* in file lfsopen.c */
+extern	devcall	lfsopen(struct dentry *, char *, char *);
+
+/* in file lfsetup.c */
+extern	status	lfsetup(struct lflcblk *);
+
+/* in file lftruncate.c */
+extern	status	lftruncate(struct lflcblk *);
+
+/* in file lpgetc.c */
+extern	devcall	lpgetc(struct dentry *);
+
+/* in file lpinit.c */
+extern	devcall	lpinit(struct dentry *);
+
+/* in file lpopen.c */
+extern	devcall	lpopen(struct dentry *, char *, char *);
+
+/* in file lpputc.c */
+extern	devcall	lpputc(struct dentry *, char);
+
+/* in file lpread.c */
+extern	devcall	lpread(struct dentry *, char *, int32);
+
+/* in file lpwrite.c */
+extern	devcall	lpwrite(struct dentry *, char *, int32);
+
+/* in file mark.c */
+extern	void	_mkinit(void);
+
+/* in file memcpy.c */
+extern	void	*memcpy(void *, const void *, int32);
+
+/* in file memcpy.c */
+extern	int32	*memcmp(void *, const void *, int32);
+
+/* in file memset.c */
+extern  void    *memset(void *, const int, int32);
+
+/* in file mkbufpool.c */
+extern	bpid32	mkbufpool(int32, int32);
+
+/* in file mount.c */
+extern	syscall	mount(char *, char *, did32);
+extern	int32	namlen(char *, int32);
+
+/* in file naminit.c */
+extern	status	naminit(void);
+
+/* in file nammap.c */
+extern	devcall	nammap(char *, char[], did32);
+extern	did32	namrepl(char *, char[]);
+extern	status	namcpy(char *, char *, int32);
+
+/* in file namopen.c */
+extern	devcall	namopen(struct dentry *, char *, char *);
+
+/* in file newqueue.c */
+extern	qid16	newqueue(void);
+
+/* in file open.c */
+extern	syscall	open(did32, char *, char *);
+
+/* in file panic.c */
+extern	void	panic(char *);
+
+/* in file pci.c */
+extern	int32	pci_init(void);
+
+/* in file pdump.c */
+extern	void	pdump(struct netpacket *);
+extern	void	pdumph(struct netpacket *);
+
+/* in file platinit.c */
+extern	void	platinit(void);
+
+/* in file ptclear.c */
+extern	void	_ptclear(struct ptentry *, uint16, int32 (*)(int32));
+
+/* in file ptcount.c */
+extern	int32	ptcount(int32);
+
+/* in file ptcreate.c */
+extern	syscall	ptcreate(int32);
+
+/* in file ptdelete.c */
+extern	syscall	ptdelete(int32, int32 (*)(int32));
+
+/* in file ptinit.c */
+extern	syscall	ptinit(int32);
+
+/* in file ptrecv.c */
+extern	uint32	ptrecv(int32);
+
+/* in file ptreset.c */
+extern	syscall	ptreset(int32, int32 (*)(int32));
+
+/* in file ptsend.c */
+extern	syscall	ptsend(int32, umsg32);
+
+/* in file putc.c */
+extern	syscall	putc(did32, char);
+
+/* in file queue.c */
+extern	pid32	enqueue(pid32, qid16);
+extern	pid32	dequeue(qid16);
+
+/* in file ramclose.c */
+extern	devcall	ramclose(struct dentry *);
+
+/* in file raminit.c */
+extern	devcall	raminit(struct dentry *);
+
+/* in file ramopen.c */
+extern	devcall	ramopen(struct dentry *, char *, char *);
+
+/* in file ramread.c */
+extern	devcall	ramread(struct dentry *, char *, int32);
+
+/* in file ramwrite.c */
+extern	devcall	ramwrite(struct dentry *, char *, int32);
+
+/* in file rdsclose.c */
+extern	devcall	rdsclose(struct dentry *);
+
+/* in file rdscontrol.c */
+extern	devcall	rdscontrol(struct dentry *, int32, int32, int32);
+
+/* in file rdsinit.c */
+extern	devcall	rdsinit(struct dentry *);
+
+/* in file rdsopen.c */
+extern	devcall	rdsopen(struct dentry *, char *, char *);
+
+/* in file rdsread.c */
+extern	devcall	rdsread(struct dentry *, char *, int32);
+
+/* in file rdswrite.c */
+extern	devcall	rdswrite(struct dentry *, char *, int32);
+
+/* in file rdsbufalloc.c */
+extern	struct	rdbuff * rdsbufalloc(struct rdscblk *);
+
+/* in file rdscomm.c */
+extern	status	rdscomm(struct rd_msg_hdr *, int32, struct rd_msg_hdr *,
+		int32, struct rdscblk *);
+
+/* in file rdsprocess.c */
+extern	void	rdsprocess(struct rdscblk *);
+
+/* in file read.c */
+extern	syscall	read(did32, char *, uint32);
+
+/* in file ready.c */
+extern	status	ready(pid32);
+
+/* in file receive.c */
+extern	umsg32	receive(void);
+
+/* in file recvclr.c */
+extern	umsg32	recvclr(void);
+
+/* in file recvtime.c */
+extern	umsg32	recvtime(int32);
+
+/* in file resched.c */
+extern	void	resched(void);
+extern	status	resched_cntl(int32);
+
+/* in file intr.S */
+extern	void	restore(intmask);
+
+/* in file resume.c */
+extern	pri16	resume(pid32);
+
+/* in file rfsgetmode.c */
+extern	int32	rfsgetmode(char * );
+
+/* in file rflclose.c */
+extern	devcall	rflclose(struct dentry *);
+
+/* in file rfscontrol.c */
+extern	devcall	rfscontrol(struct dentry *, int32, int32, int32);
+
+/* in file rflgetc.c */
+extern	devcall	rflgetc(struct dentry *);
+
+/* in file rflinit.c */
+extern	devcall	rflinit(struct dentry *);
+
+/* in file rflputc.c */
+extern	devcall	rflputc(struct dentry *, char );
+
+/* in file rflread.c */
+extern	devcall	rflread(struct dentry *, char *, int32 );
+
+/* in file rflseek.c */
+extern	devcall	rflseek(struct dentry *, uint32 );
+
+/* in file rflwrite.c */
+extern	devcall	rflwrite(struct dentry *, char *, int32 );
+
+/* in file rfsndmsg.c */
+extern	status	rfsndmsg(uint16, char *);
+
+/* in file rfsinit.c */
+extern	devcall	rfsinit(struct dentry *);
+
+/* in file rfsopen.c */
+extern	devcall	rfsopen(struct dentry  *devptr, char *, char *);
+
+/* in file rfscomm.c */
+extern	int32	rfscomm(struct rf_msg_hdr *, int32, struct rf_msg_hdr *, int32);
+
+/* in file rdsclose.c */
+extern	devcall	rdsclose(struct dentry *);
+
+/* in file rdscontrol.c */
+extern	devcall	rdscontrol(struct dentry *, int32, int32, int32);
+
+/* in file rdsinit.c */
+extern	devcall	rdsinit(struct dentry *);
+
+/* in file rdsopen.c */
+extern	devcall	rdsopen(struct dentry *, char *, char *);
+
+/* in file rdsread.c */
+extern	devcall	rdsread(struct dentry *, char *, int32);
+
+/* in file rdswrite.c */
+extern	devcall	rdswrite(struct dentry *, char *, int32);
+
+/* in file rdsbufalloc.c */
+extern	struct	rdbuff * rdsbufalloc(struct rdscblk *);
+
+/* in file rdscomm.c */
+extern	status	rdscomm(struct rd_msg_hdr *, int32, struct rd_msg_hdr *, int32, struct rdscblk *);
+
+/* in file rdsprocess.c */
+extern	void	rdsprocess(struct rdscblk *);
+
+/* in file seek.c */
+extern	syscall	seek(did32, uint32);
+
+/* in file semcount.c */
+extern	syscall	semcount(sid32);
+
+/* in file semcreate.c */
+extern	sid32	semcreate(int32);
+
+/* in file semdelete.c */
+extern	syscall	semdelete(sid32);
+
+/* in file semreset.c */
+extern	syscall	semreset(sid32, int32);
+
+/* in file send.c */
+extern	syscall	send(pid32, umsg32);
+
+/* in file shell.c */
+extern 	process shell(did32);
+
+/* in file signal.c */
+extern	syscall	signal(sid32);
+
+/* in file signaln.c */
+extern	syscall	signaln(sid32, int32);
+
+/* in file sleep.c */
+extern	syscall	sleepms(int32);
+extern	syscall	sleep(int32);
+
+/* in file spicontrol.c */
+extern	devcall	spicontrol(struct dentry *, int32, int32, int32);
+
+/* in spiinit.c */
+extern	int32	spiinit(struct dentry *);
+
+/* in file start.S */
+extern	int32	inb(int32);
+extern	int32	inw(int32);
+extern	int32	inl(int32);
+extern	int32	outb(int32, int32);
+extern	int32	outw(int32, int32);
+extern	int32	outl(int32, int32);
+extern	int32	outsw(int32, int32, int32);
+extern	int32	insw(int32, int32 ,int32);
+
+/* in file suspend.c */
+extern	syscall	suspend(pid32);
+
+/* in file ttycontrol.c */
+extern	devcall	ttycontrol(struct dentry *, int32, int32, int32);
+
+/* in file ttygetc.c */
+extern	devcall	ttygetc(struct dentry *);
+
+/* in file ttyhandle_in.c */
+extern	void	ttyhandle_in(struct ttycblk *, struct uart_csreg *);
+
+/* in file ttyhandle_out.c */
+extern	void	ttyhandle_out(struct ttycblk *, struct uart_csreg *);
+
+/* in file ttyhandler.c */
+extern	void	ttyhandler(uint32);
+
+/* in file ttyinit.c */
+extern	devcall	ttyinit(struct dentry *);
+
+/* in file ttykickout.c */
+extern	void	ttykickout(struct uart_csreg *);
+
+/* in file ttyputc.c */
+extern	devcall	ttyputc(struct dentry *, char);
+
+/* in file ttyread.c */
+extern	devcall	ttyread(struct dentry *, char *, int32);
+
+/* in file ttywrite.c */
+extern	devcall	ttywrite(struct dentry *, char *, int32);
+
+/* in file udp.c */
+
+extern	void	udp_init(void);
+extern	void	udp_in(struct netpacket *);
+extern	uid32	udp_register(uint32, uint16, uint16);
+extern	int32	udp_recv(uid32, char *, int32, uint32);
+extern	int32	udp_recvaddr(uid32, uint32 *, uint16 *, char *, int32, uint32);
+extern	status	udp_send(uid32, char *, int32);
+extern	status	udp_sendto(uid32, uint32, uint16, char *, int32);
+extern	status	udp_release(uid32);
+extern	void	udp_ntoh(struct netpacket *);
+extern	void	udp_hton(struct netpacket *);
+
+
+/* in file unsleep.c */
+extern	syscall	unsleep(pid32);
+
+/* in file userret.c */
+extern	void	userret(void);
+
+/* in file wait.c */
+extern	syscall	wait(sid32);
+
+/* in file wakeup.c */
+extern	void	wakeup(void);
+
+/* in file write.c */
+extern	syscall	write(did32, char *, uint32);
+
+/* in file xdone.c */
+extern	void	xdone(void);
+
+/* in file yield.c */
+extern	syscall	yield(void);
+
+/* in file syscall.c */
+extern void syscall_init();
+
+/* in file suicide.c */
+
+/* in file lib/syscall. c*/
+
+/* in file spiinit.c */
+// extern	devcall	spiinit(struct dentry *);
+
+/* in file spiputc.c */
+extern	devcall	spiputc(struct dentry *, char);
+
+
+/* NETWORK BYTE ORDER CONVERSION NOT NEEDED ON A BIG-ENDIAN COMPUTER */
+#define	htons(x)   ( ( 0xff & ((x)>>8) ) | ( (0xff & (x)) << 8 ) )
+#define	htonl(x)   (  (((x)>>24) & 0x000000ff) | (((x)>> 8) & 0x0000ff00) | \
+		      (((x)<< 8) & 0x00ff0000) | (((x)<<24) & 0xff000000) )
+#define	ntohs(x)   ( ( 0xff & ((x)>>8) ) | ( (0xff & (x)) << 8 ) )
+#define	ntohl(x)   (  (((x)>>24) & 0x000000ff) | (((x)>> 8) & 0x0000ff00) | \
+		      (((x)<< 8) & 0x00ff0000) | (((x)<<24) & 0xff000000) )
diff --git a/include/queue.h b/include/queue.h
new file mode 100644
index 0000000..275563e
--- /dev/null
+++ b/include/queue.h
@@ -0,0 +1,36 @@
+/* queue.h - firstid, firstkey, isempty, lastkey, nonempty		*/
+
+/* Queue structure declarations, constants, and inline functions	*/
+
+/* Default # of queue entries: 1 per process plus 2 for ready list plus	*/
+/*			2 for sleep list plus 2 per semaphore		*/
+#ifndef NQENT
+#define NQENT	(NPROC + 4 + NSEM + NSEM)
+#endif
+
+#define	EMPTY	(-1)		/* Null value for qnext or qprev index	*/
+#define	MAXKEY	0x7FFFFFFF	/* Max key that can be stored in queue	*/
+#define	MINKEY	0x80000000	/* Min key that can be stored in queue	*/
+
+struct	qentry	{		/* One per process plus two per list	*/
+	int32	qkey;		/* Key on which the queue is ordered	*/
+	qid16	qnext;		/* Index of next process or tail	*/
+	qid16	qprev;		/* Index of previous process or head	*/
+};
+
+extern	struct qentry	queuetab[];
+
+/* Inline queue manipulation functions */
+
+#define	queuehead(q)	(q)
+#define	queuetail(q)	((q) + 1)
+#define	firstid(q)	(queuetab[queuehead(q)].qnext)
+#define	lastid(q)	(queuetab[queuetail(q)].qprev)
+#define	isempty(q)	(firstid(q) >= NPROC)
+#define	nonempty(q)	(firstid(q) <  NPROC)
+#define	firstkey(q)	(queuetab[firstid(q)].qkey)
+#define	lastkey(q)	(queuetab[ lastid(q)].qkey)
+
+/* Inline to check queue id assumes interrupts are disabled */
+
+#define	isbadqid(x)	(((int32)(x) < NPROC) || (int32)(x) >= NQENT-1)
diff --git a/include/ramdisk.h b/include/ramdisk.h
new file mode 100644
index 0000000..dab730c
--- /dev/null
+++ b/include/ramdisk.h
@@ -0,0 +1,12 @@
+/* ramdisk.h - definitions for a ram disk (for testing) */
+
+/* Ram disk block size */
+
+#define	RM_BLKSIZ	5		/* block size			*/
+#define	RM_BLKS		2		/* number of blocks		*/
+
+struct	ramdisk	{
+	char	disk[RM_BLKSIZ * RM_BLKS];
+	};
+
+extern	struct	ramdisk	Ram;
diff --git a/include/rdisksys.h b/include/rdisksys.h
new file mode 100644
index 0000000..21c1f54
--- /dev/null
+++ b/include/rdisksys.h
@@ -0,0 +1,235 @@
+/* rdisksys.h - definitions for remote disk system pseudo-devices */
+
+#ifndef	Nrds
+#define	Nrds		1
+#endif
+
+/* Remote disk block size */
+
+#define	RD_BLKSIZ	512
+
+/* Global data for the remote disk server */
+
+#ifndef	RD_SERVER_IP
+#define	RD_SERVER_IP	"255.255.255.255"
+#endif
+
+#ifndef	RD_SERVER_PORT
+#define	RD_SERVER_PORT	33124
+#endif
+
+#ifndef	RD_LOC_PORT
+#define	RD_LOC_PORT	33124		/* Base port number - minor dev	*/
+					/*   number is added to insure	*/
+					/*   that each device is unique	*/
+#endif
+
+/* Control block for remote disk device */
+
+#define	RD_IDLEN	64		/* Size of a remote disk ID	*/
+#define	RD_BUFFS	64		/* Number of disk buffers	*/
+#define	RD_STACK	16384		/* Stack size for comm. process	*/
+#define	RD_PRIO		200		/* Priorty of comm. process	*/
+
+/* Constants for state of the device */
+
+#define	RD_FREE		 0		/* Device is available		*/
+#define	RD_OPEN		 1		/* Device is open (in use)	*/
+#define	RD_PEND		 2		/* Open is pending		*/
+
+/* Operations for request queue */
+
+#define	RD_OP_READ	1		/* Read operation on req. list	*/
+#define	RD_OP_WRITE	2		/* Write operation on req. list	*/
+#define	RD_OP_SYNC	3		/* Sync operation on req. list	*/
+
+/* Status values for a buffer */
+
+#define	RD_VALID	0		/* Buffer contains valid data	*/
+#define	RD_INVALID	1		/* Buffer does not contain data	*/
+
+/* Definition of a buffer with a header that allows the same node to be	*/
+/*  used as a request on the request queue, an item in the cache, or a	*/
+/*  node on the free list of buffers					*/
+
+struct	rdbuff	{			/* Request list node		*/
+	struct	rdbuff	*rd_next;	/* Ptr to next node on a list	*/
+	struct	rdbuff	*rd_prev;	/* Ptr to prev node on a list	*/
+	int32	rd_op;			/* Operation - read/write/sync	*/
+	int32	rd_refcnt;		/* Reference count of processes	*/
+					/*   reading the block		*/
+	uint32	rd_blknum;		/* Block number of this block	*/
+	int32	rd_status;		/* Is buffer currently valid?	*/
+	pid32	rd_pid;			/* Process that initiated a	*/
+					/*   read request for the block	*/
+	char	rd_block[RD_BLKSIZ];	/* Space to hold one disk block	*/
+};
+
+struct	rdscblk	{
+	int32	rd_state;		/* State of device		*/
+	char	rd_id[RD_IDLEN];	/* Disk ID currently being used	*/
+	int32	rd_seq;			/* Next sequence number to use	*/
+	/* Request queue head and tail */
+	struct	rdbuff	*rd_rhnext;	/* Head of request queue: next	*/
+	struct	rdbuff	*rd_rhprev;	/*   and previous		*/
+	struct	rdbuff	*rd_rtnext;	/* Tail of request queue: next	*/
+	struct	rdbuff	*rd_rtprev;	/*   (null) and previous	*/
+
+	/* Cache head and tail */
+
+	struct	rdbuff	*rd_chnext;	/* Head of cache: next and	*/
+	struct	rdbuff	*rd_chprev;	/*   previous			*/
+	struct	rdbuff	*rd_ctnext;	/* Tail of cache: next (null)	*/
+	struct	rdbuff	*rd_ctprev;	/*   and previous		*/
+
+	/* Free list head (singly-linked) */
+
+	struct	rdbuff	*rd_free;	/* Pointer to free list		*/
+
+	pid32	rd_comproc;		/* Process ID of comm. process	*/
+	bool8	rd_comruns;		/* Has comm. process started?	*/
+	sid32	rd_availsem;		/* Semaphore ID for avail buffs	*/
+	sid32	rd_reqsem;		/* Semaphore ID for requests	*/
+	uint32	rd_ser_ip;		/* Server IP address		*/
+	uint16	rd_ser_port;		/* Server UDP port		*/
+	uint16	rd_loc_port;		/* Local (client) UPD port	*/
+	bool8	rd_registered;		/* Has UDP port been registered?*/
+	int32	rd_udpslot;		/* Registered UDP slot		*/
+};
+
+
+extern	struct	rdscblk	rdstab[];	/* Remote disk control block	*/
+
+/* Definitions of parameters used during server access */
+
+#define	RD_RETRIES	3		/* Times to retry sending a msg	*/
+#define	RD_TIMEOUT	2000		/* Timeout for reply (2 seconds)*/
+
+/* Control functions for a remote file pseudo device */
+
+#define	RDS_CTL_DEL	1		/* Delete (erase) an entire disk*/
+#define RDS_CTL_SYNC	2		/* Write all pending blocks	*/
+
+/************************************************************************/
+/*	Definition of messages exchanged with the remote disk server	*/
+/************************************************************************/
+/* Values for the type field in messages */
+
+#define	RD_MSG_RESPONSE	0x0100		/* Bit that indicates response	*/
+
+#define	RD_MSG_RREQ	0x0010		/* Read request and response	*/
+#define	RD_MSG_RRES	(RD_MSG_RREQ | RD_MSG_RESPONSE)
+
+#define	RD_MSG_WREQ	0x0020		/* Write request and response	*/
+#define	RD_MSG_WRES	(RD_MSG_WREQ | RD_MSG_RESPONSE)
+
+#define	RD_MSG_OREQ	0x0030		/* Open request and response 	*/
+#define	RD_MSG_ORES	(RD_MSG_OREQ | RD_MSG_RESPONSE)
+
+#define	RD_MSG_CREQ	0x0040		/* Close request and response	*/
+#define	RD_MSG_CRES	(RD_MSG_CREQ | RD_MSG_RESPONSE)
+
+#define	RD_MSG_DREQ	0x0050		/* Delete request and response 	*/
+#define	RD_MSG_DRES	(RD_MSG_DREQ | RD_MSG_RESPONSE)
+
+#define	RD_MIN_REQ	RD_MSG_RREQ	/* Minimum request type		*/
+#define	RD_MAX_REQ	RD_MSG_DREQ	/* Maximum request type		*/
+
+/* Message header fields present in each message */
+
+#define	RD_MSG_HDR			/* Common message fields	*/\
+	uint16	rd_type;		/* Message type			*/\
+	uint16	rd_status;		/* 0 in req, status in response	*/\
+	uint32	rd_seq;			/* Message sequence number	*/\
+	char	rd_id[RD_IDLEN];	/* Null-terminated disk ID	*/
+
+/************************************************************************/
+/*				Header					*/
+/************************************************************************/
+/* The standard header present in all messages with no extra fields */
+#pragma pack(2)
+struct	rd_msg_hdr {			/* Header fields present in each*/
+	RD_MSG_HDR			/*   remote file system message	*/
+};
+#pragma pack()
+
+/************************************************************************/
+/*				Read					*/
+/************************************************************************/
+#pragma pack(2)
+struct	rd_msg_rreq	{		/* Remote file read request	*/
+	RD_MSG_HDR			/* Header fields		*/
+	uint32	rd_blk;			/* Block number to read		*/
+};
+#pragma pack()
+
+#pragma pack(2)
+struct	rd_msg_rres	{		/* Remote file read reply	*/
+	RD_MSG_HDR			/* Header fields		*/
+	uint32	rd_blk;			/* Block number that was read	*/
+	char	rd_data[RD_BLKSIZ];	/* Array containing one block	*/
+};
+#pragma pack()
+
+/************************************************************************/
+/*				Write					*/
+/************************************************************************/
+#pragma pack(2)
+struct	rd_msg_wreq	{		/* Remote file write request	*/
+	RD_MSG_HDR			/* Header fields		*/
+	uint32	rd_blk;			/* Block number to write	*/
+	char	rd_data[RD_BLKSIZ];	/* Array containing one block	*/
+};
+#pragma pack()
+
+#pragma pack(2)
+struct	rd_msg_wres	{		/* Remote file write response	*/
+	RD_MSG_HDR			/* Header fields		*/
+	uint32	rd_blk;			/* Block number that was written*/
+};
+#pragma pack()
+
+/************************************************************************/
+/*				Open					*/
+/************************************************************************/
+#pragma pack(2)
+struct	rd_msg_oreq	{		/* Remote file open request	*/
+	RD_MSG_HDR			/* Header fields		*/
+};
+#pragma pack()
+
+#pragma pack(2)
+struct	rd_msg_ores	{		/* Remote file open response	*/
+	RD_MSG_HDR			/* Header fields		*/
+};
+#pragma pack()
+
+/************************************************************************/
+/*				Close					*/
+/************************************************************************/
+#pragma pack(2)
+struct	rd_msg_creq	{		/* Remote file close request	*/
+	RD_MSG_HDR			/* Header fields		*/
+};
+#pragma pack()
+
+#pragma pack(2)
+struct	rd_msg_cres	{		/* Remote file close response	*/
+	RD_MSG_HDR			/* Header fields		*/
+};
+#pragma pack()
+
+/************************************************************************/
+/*				Delete					*/
+/************************************************************************/
+#pragma pack(2)
+struct	rd_msg_dreq	{		/* Remote file delete request	*/
+	RD_MSG_HDR			/* Header fields		*/
+};
+#pragma pack()
+
+#pragma pack(2)
+struct	rd_msg_dres	{		/* Remote file delete response	*/
+	RD_MSG_HDR			/* Header fields		*/
+};
+#pragma pack()
diff --git a/include/resched.h b/include/resched.h
new file mode 100644
index 0000000..04a9ead
--- /dev/null
+++ b/include/resched.h
@@ -0,0 +1,16 @@
+/* resched.h */
+
+/* Constants and variables related to deferred rescheduling */
+
+#define	DEFER_START	1	/* Start deferred rescehduling		*/
+#define	DEFER_STOP	2	/* Stop  deferred rescehduling		*/
+
+/* Structure that collects items related to deferred rescheduling	*/
+
+struct	defer	{
+	int32	ndefers;	/* Number of outstanding defers 	*/
+	bool8	attempt;	/* Was resched called during the	*/
+				/*   deferral period?			*/
+};
+
+extern	struct	defer	Defer;
diff --git a/include/rfilesys.h b/include/rfilesys.h
new file mode 100644
index 0000000..4ed7f32
--- /dev/null
+++ b/include/rfilesys.h
@@ -0,0 +1,292 @@
+/* rfilesys.h - Definitions for remote file system pseudo-devices */
+
+#ifndef	Nrfl
+#define	Nrfl	10
+#endif
+
+/* Control block for a remote file pseudo-device */
+
+#define	RF_NAMLEN	128		/* Maximum length of file name	*/
+#define	RF_DATALEN	1024		/* Maximum data in read or write*/
+#define	RF_MODE_R	F_MODE_R	/* Bit to grant read access	*/
+#define	RF_MODE_W	F_MODE_W	/* Bit to grant write access	*/
+#define	RF_MODE_RW	F_MODE_RW	/* Mask for read and write bits	*/
+#define	RF_MODE_N	F_MODE_N	/* Bit for "new" mode		*/
+#define	RF_MODE_O	F_MODE_O	/* Bit for "old" mode		*/
+#define	RF_MODE_NO	F_MODE_NO	/* Mask for "n" and "o" bits	*/
+
+/* Global data for the remote server */
+
+#ifndef	RF_SERVER_IP
+#define	RF_SERVER_IP	"128.10.3.51"
+#endif
+
+#ifndef	RF_SERVER_PORT
+#define	RF_SERVER_PORT	33123
+#endif
+
+#ifndef	RF_LOC_PORT
+#define	RF_LOC_PORT	33123
+#endif
+
+struct	rfdata	{
+	int32	rf_seq;			/* Next sequence number to use	*/
+	uint32	rf_ser_ip;		/* Server IP address		*/
+	uint16	rf_ser_port;		/* Server UDP port		*/
+	uint16	rf_loc_port;		/* Local (client) UPD port	*/
+	int32	rf_udp_slot;		/* UDP slot to use		*/
+	sid32	rf_mutex;		/* Mutual exclusion for access	*/
+	bool8	rf_registered;		/* Has UDP port been registered?*/
+};
+
+extern	struct	rfdata	Rf_data;
+
+/* Definition of the control block for a remote file pseudo-device	*/
+
+#define	RF_FREE	0			/* Entry is currently unused	*/
+#define	RF_USED	1			/* Entry is currently in use	*/
+
+struct	rflcblk	{
+	int32	rfstate;		/* Entry is free or used	*/
+	int32	rfdev;			/* Device number of this dev.	*/
+	char	rfname[RF_NAMLEN];	/* Name of the file		*/
+	uint32	rfpos;			/* Current file position	*/
+	uint32	rfmode;			/* Mode: read access, write	*/
+					/*	access or both		*/
+};
+
+extern	struct	rflcblk	rfltab[];	/* Remote file control blocks	*/
+
+/* Definitions of parameters used when accessing a remote server	*/
+
+#define	RF_RETRIES	3		/* Time to retry sending a msg	*/
+#define	RF_TIMEOUT	3000		/* Wait one second for a reply	*/
+
+/* Control functions for a remote file pseudo device */
+
+#define	RFS_CTL_DEL	F_CTL_DEL	/* Delete a file		*/
+#define	RFS_CTL_TRUNC	F_CTL_TRUNC	/* Truncate a file		*/
+#define	RFS_CTL_MKDIR	F_CTL_MKDIR	/* Make a directory		*/
+#define	RFS_CTL_RMDIR	F_CTL_RMDIR	/* Remove a directory		*/
+#define RFS_CTL_SIZE	F_CTL_SIZE	/* Obtain the size of a file	*/
+
+/************************************************************************/
+/*									*/
+/*	Definition of messages exchanged with the remote server		*/
+/*									*/
+/************************************************************************/
+
+/* Values for the type field in messages */
+
+#define	RF_MSG_RESPONSE	0x0100		/* Bit that indicates response	*/
+
+#define	RF_MSG_RREQ	0x0001		/* Read Request and response	*/
+#define	RF_MSG_RRES	(RF_MSG_RREQ | RF_MSG_RESPONSE)
+
+#define	RF_MSG_WREQ	0x0002		/* Write Request and response	*/
+#define	RF_MSG_WRES	(RF_MSG_WREQ | RF_MSG_RESPONSE)
+
+#define	RF_MSG_OREQ	0x0003		/* Open request and response 	*/
+#define	RF_MSG_ORES	(RF_MSG_OREQ | RF_MSG_RESPONSE)
+
+#define	RF_MSG_DREQ	0x0004		/* Delete request and response 	*/
+#define	RF_MSG_DRES	(RF_MSG_DREQ | RF_MSG_RESPONSE)
+
+#define	RF_MSG_TREQ	0x0005		/* Truncate request & response	*/
+#define	RF_MSG_TRES	(RF_MSG_TREQ | RF_MSG_RESPONSE)
+
+#define	RF_MSG_SREQ	0x0006		/* Size request and response	*/
+#define	RF_MSG_SRES	(RF_MSG_SREQ | RF_MSG_RESPONSE)
+
+#define	RF_MSG_MREQ	0x0007		/* Mkdir request and response 	*/
+#define	RF_MSG_MRES	(RF_MSG_MREQ | RF_MSG_RESPONSE)
+
+#define	RF_MSG_XREQ	0x0008		/* Rmdir request and response 	*/
+#define	RF_MSG_XRES	(RF_MSG_XREQ | RF_MSG_RESPONSE)
+
+#define	RF_MIN_REQ	RF_MSG_RREQ	/* Minimum request type		*/
+#define	RF_MAX_REQ	RF_MSG_XREQ	/* Maximum request type		*/
+
+/* Message header fields present in each message */
+
+#define	RF_MSG_HDR			/* Common message fields	*/\
+	uint16	rf_type;		/* Message type			*/\
+	uint16	rf_status;		/* 0 in req, status in response	*/\
+	uint32	rf_seq;			/* Message sequence number	*/\
+	char	rf_name[RF_NAMLEN];	/* Null-terminated file name	*/
+
+/* The standard header present in all messages with no extra fields	*/
+
+/************************************************************************/
+/*									*/
+/*				Header					*/
+/*									*/
+/************************************************************************/
+
+#pragma pack(2)
+struct	rf_msg_hdr {			/* Header fields present in each*/
+	RF_MSG_HDR			/*   remote file system message	*/
+};
+#pragma pack()
+
+/************************************************************************/
+/*									*/
+/*				Read					*/
+/*									*/
+/************************************************************************/
+
+#pragma pack(2)
+struct	rf_msg_rreq	{		/* Remote file read request	*/
+	RF_MSG_HDR			/* Header fields		*/
+	uint32	rf_pos;			/* Position in file to read	*/
+	uint32	rf_len;			/* Number of bytes to read	*/
+					/*   (between 1 and 1024)	*/
+};
+#pragma pack()
+
+#pragma pack(2)
+struct	rf_msg_rres	{		/* Remote file read reply	*/
+	RF_MSG_HDR			/* Header fields		*/
+	uint32	rf_pos;			/* Position in file		*/
+	uint32	rf_len;			/* Number of bytes that follow	*/
+					/*   (0 for EOF)		*/
+	char	rf_data[RF_DATALEN];	/* Array containing data from	*/
+					/*   the file			*/
+};
+#pragma pack()
+
+/************************************************************************/
+/*									*/
+/*				Write					*/
+/*									*/
+/************************************************************************/
+
+#pragma pack(2)
+struct	rf_msg_wreq	{		/* Remote file write request	*/
+	RF_MSG_HDR			/* Header fields		*/
+	uint32	rf_pos;			/* Position in file		*/
+	uint32	rf_len;			/* Number of valid bytes in	*/
+					/*   array that follows		*/
+	char	rf_data[RF_DATALEN];	/* Array containing data to be	*/
+					/*   written to the file	*/
+};
+#pragma pack()
+
+#pragma pack(2)
+struct	rf_msg_wres	{		/* Remote file write response	*/
+	RF_MSG_HDR			/* Header fields		*/
+	uint32	rf_pos;			/* Original position in file	*/
+	uint32	rf_len;			/* Number of bytes written	*/
+};
+#pragma pack()
+
+/************************************************************************/
+/*									*/
+/*				Open					*/
+/*									*/
+/************************************************************************/
+
+#pragma pack(2)
+struct	rf_msg_oreq	{		/* Remote file open request	*/
+	RF_MSG_HDR			/* Header fields		*/
+	int32	rf_mode;		/* Xinu mode bits		*/
+};
+#pragma pack()
+
+#pragma pack(2)
+struct	rf_msg_ores	{		/* Remote file open response	*/
+	RF_MSG_HDR			/* Header fields		*/
+	int32	rf_mode;		/* Xinu mode bits		*/
+};
+#pragma pack()
+
+/************************************************************************/
+/*									*/
+/*				Size					*/
+/*									*/
+/************************************************************************/
+
+#pragma pack(2)
+struct	rf_msg_sreq	{		/* Remote file size request	*/
+	RF_MSG_HDR			/* Header fields		*/
+};
+#pragma pack()
+
+#pragma pack(2)
+struct	rf_msg_sres	{		/* Remote file status response	*/
+	RF_MSG_HDR			/* Header fields		*/
+	uint32	rf_size;		/* Size of file in bytes	*/
+};
+#pragma pack()
+
+/************************************************************************/
+/*									*/
+/*				Delete					*/
+/*									*/
+/************************************************************************/
+
+#pragma pack(2)
+struct	rf_msg_dreq	{		/* Remote file delete request	*/
+	RF_MSG_HDR			/* Header fields		*/
+};
+#pragma pack()
+
+#pragma pack(2)
+struct	rf_msg_dres	{		/* Remote file delete response	*/
+	RF_MSG_HDR			/* Header fields		*/
+};
+#pragma pack()
+
+/************************************************************************/
+/*									*/
+/*				Truncate				*/
+/*									*/
+/************************************************************************/
+
+#pragma pack(2)
+struct	rf_msg_treq	{		/* Remote file truncate request	*/
+	RF_MSG_HDR			/* Header fields		*/
+};
+#pragma pack()
+
+#pragma pack(2)
+struct	rf_msg_tres	{		/* Remote file truncate response*/
+	RF_MSG_HDR			/* Header fields		*/
+};
+#pragma pack()
+
+/************************************************************************/
+/*									*/
+/*				Mkdir					*/
+/*									*/
+/************************************************************************/
+
+#pragma pack(2)
+struct	rf_msg_mreq	{		/* Remote file mkdir request	*/
+	RF_MSG_HDR			/* Header fields		*/
+};
+#pragma pack()
+
+#pragma pack(2)
+struct	rf_msg_mres	{		/* Remote file mkdir response	*/
+	RF_MSG_HDR			/* Header fields		*/
+};
+#pragma pack()
+
+/************************************************************************/
+/*									*/
+/*				Rmdir					*/
+/*									*/
+/************************************************************************/
+
+#pragma pack(2)
+struct	rf_msg_xreq	{		/* Remote file rmdir request	*/
+	RF_MSG_HDR			/* Header fields		*/
+};
+#pragma pack()
+
+#pragma pack(2)
+struct	rf_msg_xres	{		/* Remote file rmdir response	*/
+	RF_MSG_HDR			/* Header fields		*/
+};
+#pragma pack()
diff --git a/include/semaphore.h b/include/semaphore.h
new file mode 100644
index 0000000..4be66a0
--- /dev/null
+++ b/include/semaphore.h
@@ -0,0 +1,22 @@
+/* semaphore.h - isbadsem */
+
+#ifndef	NSEM
+#define	NSEM		120	/* Number of semaphores, if not defined	*/
+#endif
+
+/* Semaphore state definitions */
+
+#define	S_FREE	0		/* Semaphore table entry is available	*/
+#define	S_USED	1		/* Semaphore table entry is in use	*/
+
+/* Semaphore table entry */
+struct	sentry	{
+	byte	sstate;		/* Whether entry is S_FREE or S_USED	*/
+	int32	scount;		/* Count for the semaphore		*/
+	qid16	squeue;		/* Queue of processes that are waiting	*/
+				/*     on the semaphore			*/
+};
+
+extern	struct	sentry semtab[];
+
+#define	isbadsem(s)	((int32)(s) < 0 || (s) >= NSEM)
diff --git a/include/serial_avr.h b/include/serial_avr.h
new file mode 100644
index 0000000..250bd90
--- /dev/null
+++ b/include/serial_avr.h
@@ -0,0 +1,21 @@
+/**********************************************************************
+ *
+ * Filename:    serial.h
+ * 
+ * API para la aplicacion embebida 
+ *
+ * META : ocultar el hardware a la aplicacion 
+ *
+ **********************************************************************/
+
+#ifndef _SERIAL_H
+#define _SERIAL_H
+
+void serial_init(void);
+void serial_put_char(char outputChar);
+char serial_get_char(void);
+void serial_put_str(char * outputStr);
+char* serial_get_str(void);
+
+
+#endif /* _SERIAL_H */
diff --git a/include/shell.h b/include/shell.h
new file mode 100644
index 0000000..8403e10
--- /dev/null
+++ b/include/shell.h
@@ -0,0 +1,77 @@
+/* shell.h - Declarations and constants used by the Xinu shell */
+
+/* Size constants */
+
+#define SHELL_BUFLEN	TY_IBUFLEN+1	/* Length of input buffer	*/
+#define SHELL_MAXTOK	32		/* Maximum tokens per line	*/
+#define SHELL_CMDSTK	4096		/* Size of stack for process	*/
+					/*    that executes command	*/
+#define	SHELL_ARGLEN	(SHELL_BUFLEN+SHELL_MAXTOK) /* Argument area	*/
+#define SHELL_CMDPRIO	20		/* Process priority for command	*/
+
+/* Message constants */
+
+/* Shell banner (assumes VT100) */
+
+#define	SHELL_BAN0	"\033[31;1m"
+#define SHELL_BAN1      "------------------------------------------"
+#define SHELL_BAN2      "   __    __   _____    _   _    _    _    "
+#define SHELL_BAN3      "   \\ \\  / /  |__ __|  | \\ | |  | |  | |   "
+#define SHELL_BAN4      "    \\ \\/ /     | |    |  \\| |  | |  | |   "
+#define SHELL_BAN5      "    / /\\ \\    _| |_   | \\   |  | |  | |   "
+#define SHELL_BAN6      "   / /  \\ \\  |     |  | | \\ |  \\  --  /   "
+#define SHELL_BAN7      "   --    --   -----    -   -     ----     "
+#define SHELL_BAN8	"       STM32 Version by Robin Krens	   "
+#define SHELL_BAN9      "------------------------------------------"
+#define	SHELL_BAN10	"\033[0m\n"
+
+/* Messages shell displays for user */
+
+#define SHELL_PROMPT	"xsh $ "	/* Command prompt		*/
+#define SHELL_STRTMSG	"Welcome to Xinu!\n"/* Welcome message		*/
+#define SHELL_EXITMSG	"Shell closed\n"/* Shell exit message		*/
+#define SHELL_SYNERRMSG	"Syntax error\n"/* Syntax error message		*/
+#define SHELL_CREATMSG	"Cannot create process\n"/* command error	*/
+#define SHELL_INERRMSG	"Cannot open file %s for input\n" /* Input err	*/
+#define SHELL_OUTERRMSG	"Cannot open file %s for output\n"/* Output err	*/
+					/* Builtin cmd error message	*/
+#define SHELL_BGERRMSG	"Cannot redirect I/O or background a builtin\n"
+
+/* Constants used for lexical analysis */
+
+#define	SH_NEWLINE	'\n'		/* New line character		*/
+#define	SH_EOF		'\04'		/* Control-D is EOF		*/
+#define	SH_AMPER	'&'		/* Ampersand character		*/
+#define	SH_BLANK	' '		/* Blank character		*/
+#define	SH_TAB		'\t'		/* Tab character		*/
+#define	SH_SQUOTE	'\''		/* Single quote character	*/
+#define	SH_DQUOTE	'"'		/* Double quote character	*/
+#define	SH_LESS		'<'		/* Less-than character	*/
+#define	SH_GREATER	'>'		/* Greater-than character	*/
+
+/* Token types */
+
+#define	SH_TOK_AMPER	0		/* Ampersand token		*/
+#define	SH_TOK_LESS	1		/* Less-than token		*/
+#define	SH_TOK_GREATER	2		/* Greater-than token		*/
+#define	SH_TOK_OTHER	3		/* Token other than those	*/
+					/*   listed above (e.g., an	*/
+					/*   alphanumeric string)	*/
+
+/* Shell return constants */
+
+#define	SHELL_OK	 0
+#define	SHELL_ERROR	 1
+#define	SHELL_EXIT	-3
+
+/* Structure of an entry in the table of shell commands */
+
+struct	cmdent	{			/* Entry in command table	*/
+	char	*cname;			/* Name of command		*/
+	bool8	cbuiltin;		/* Is this a builtin command?	*/
+	int32	(*cfunc)(int32,char*[]);/* Function for command		*/
+};
+
+extern	uint32	ncmd;
+// RAFA extern	const	struct	cmdent	cmdtab[];
+extern	const	struct	cmdent	cmdtab[] ;
diff --git a/include/shprototypes.h b/include/shprototypes.h
new file mode 100644
index 0000000..d2059a4
--- /dev/null
+++ b/include/shprototypes.h
@@ -0,0 +1,74 @@
+/* in file xsh_argecho.c */
+extern	shellcmd  xsh_argecho	(int32, char *[]);
+
+/* in file xsh_arp.c */
+extern	shellcmd  xsh_arp	(int32, char *[]);
+
+/* in file xsh_bingid.c */
+extern	shellcmd  xsh_bingid	(int32, char *[]);
+
+/* in file xsh_cat.c */
+extern	shellcmd  xsh_cat	(int32, char *[]);
+
+/* in file xsh_clear.c */
+extern	shellcmd  xsh_clear	(int32, char *[]);
+
+/* in file xsh_date.c */
+extern	shellcmd  xsh_date	(int32, char *[]);
+
+/* in file xsh_devdump.c */
+extern	shellcmd  xsh_devdump	(int32, char *[]);
+
+/* in file xsh_echo.c */
+extern	shellcmd  xsh_echo	(int32, char *[]);
+
+/* in file xsh_ethstat.c */
+extern	shellcmd  xsh_ethstat	(int32, char *[]);
+
+/* in file xsh_exit.c */
+extern	shellcmd  xsh_exit	(int32, char *[]);
+
+/* in file xsh_help.c */
+extern	shellcmd  xsh_help	(int32, char *[]);
+
+/* in file xsh_kill.c */
+extern	shellcmd  xsh_kill	(int32, char *[]);
+
+/* in file xsh_led.c */
+extern	shellcmd  xsh_led	(int32, char *[]);
+
+/* in file xsh_memdump.c */
+extern	shellcmd  xsh_memdump	(int32, char *[]);
+
+/* in file xsh_memstat.c */
+extern	shellcmd  xsh_memstat	(int32, char *[]);
+
+/* in file xsh_netinfo.c */
+extern	shellcmd  xsh_netinfo	(int32, char *[]);
+
+/* in file xsh_nvram.c */
+extern	shellcmd  xsh_nvram	(int32, char *[]);
+
+/* in file xsh_ping.c */
+extern	shellcmd  xsh_ping	(int32, char *[]);
+
+/* in file xsh_ps.c */
+extern	shellcmd  xsh_ps	(int32, char *[]);
+
+/* in file xsh_sleep.c */
+extern	shellcmd  xsh_sleep	(int32, char *[]);
+
+/* in file xsh_udpdump.c */
+extern	shellcmd  xsh_udpdump	(int32, char *[]);
+
+/* in file xsh_udpecho.c */
+extern	shellcmd  xsh_udpecho	(int32, char *[]);
+
+/* in file xsh_udpeserver.c */
+extern	shellcmd  xsh_udpeserver (int32, char *[]);
+
+/* in file xsh_uptime.c */
+extern	shellcmd  xsh_uptime	(int32, char *[]);
+
+/* in file xsh_help.c */
+extern	shellcmd  xsh_help	(int32, char *[]);
diff --git a/include/spi.h b/include/spi.h
new file mode 100644
index 0000000..f90f37f
--- /dev/null
+++ b/include/spi.h
@@ -0,0 +1,37 @@
+/* spi.h - SPI definitions */
+
+struct	spi_csreg {
+	volatile uint32 cr1;		
+	volatile uint32 cr2;		
+	volatile uint32 sr;	
+	volatile uint32 dr;
+	volatile uint32 crcpr;		
+	volatile uint32 rxcrcr;
+	volatile uint32 txcrcr;		
+	volatile uint32 i2scfgr;
+	volatile uint32 i2spr;	
+};
+
+/* No SPI0 peripheral, starts from 1*/
+#define	SPI1_BASE	0x40013000
+
+/* Control register settings */
+#define SPI_MSTR	2
+#define SPI_ENABLE	6
+#define SPI_SSM		9
+#define	SPI_SSI		8
+#define	SPI_BIDIMODE	15
+#define SPI_BIDIOE	14
+
+/* Status register flags */
+#define SPI_BSY		7 // Busy
+#define SPI_TXE		1 // Transfer buffer empty
+#define SPI_RXNE	2 // Receive buffer NOT empty
+
+/* Baud rate control */
+#define BR_FPCLKDIV2	0x00000000
+#define BR_FPCLKDIV4	0x00000008
+#define	BR_FPCLKDIV8	0x00000010
+#define BR_FPCLKDIV16	0x00000018
+#define	BR_FPCLKDIV32	0x00000020
+#define BR_FPCLKDIV64	0x00000028
diff --git a/include/stdarg.h b/include/stdarg.h
new file mode 100644
index 0000000..929d874
--- /dev/null
+++ b/include/stdarg.h
@@ -0,0 +1,15 @@
+/**
+ * @file stdarg.h
+ * @provides va_copy, va_start, va_arg, va_end.
+ *
+ * $Id: stdarg.h 2020 2009-08-13 17:50:08Z mschul $
+ */
+/* Embedded Xinu, Copyright (C) 2009.  All rights reserved. */
+
+/* GCC-specific varargs */
+typedef __builtin_va_list va_list;
+
+#define va_copy(dst, src)	__builtin_va_copy(dst, src)
+#define va_start(last, va)	__builtin_va_start(last, va)
+#define va_arg(va, type)	__builtin_va_arg(va, type)
+#define va_end(va)		__builtin_va_end(va)
diff --git a/include/stddef.h b/include/stddef.h
new file mode 100644
index 0000000..38bd9d8
--- /dev/null
+++ b/include/stddef.h
@@ -0,0 +1,7 @@
+/* stddef.h */
+
+/* TEMPORARY */
+
+/* Function declaration return types */
+typedef void exchandler;        /**< exception procedure                */
+typedef int message;            /**< message passing content            */
diff --git a/include/stdio.h b/include/stdio.h
new file mode 100644
index 0000000..5f81903
--- /dev/null
+++ b/include/stdio.h
@@ -0,0 +1,34 @@
+/* stdio.h - definintions and constants for standard I/O functions */
+
+
+/* Prototypes for formatted input functions */
+
+extern	int32	_doscan(char *,int32 *, int32 (*)(void),
+			int32 (*)(char), int32, int32);
+extern	int32	sscanf(char *, char *, int32);
+extern	int32	fscanf(int32, char *, int32);
+#define	scanf(fmt, args)	fscanf(CONSOLE, fmt, args)
+
+
+/* Definintion of standard input/ouput/error used with shell commands */
+
+#define	stdin	((proctab[currpid]).prdesc[0])
+#define	stdout	((proctab[currpid]).prdesc[1])
+#define	stderr	((proctab[currpid]).prdesc[2])
+
+
+/* Prototypes for formatted output functions */
+
+extern	int32	fprintf(int, char *, ...);
+extern	int32	printf(const char *, ...);
+extern	int32	sprintf(char *, char *, ...);
+
+
+/* Prototypes for character input and output functions */
+
+extern	int32	fgetc(int);
+extern	char	*fgets(char *, int32, int32);
+extern	int32	fputc(int32, int32);
+extern	int32	fputs(char *, int32);
+extern	int32	putchar(int32 c);
+extern	int32	getchar(void);
diff --git a/include/stdlib.h b/include/stdlib.h
new file mode 100644
index 0000000..7365ca7
--- /dev/null
+++ b/include/stdlib.h
@@ -0,0 +1,19 @@
+/**
+ * @file stdlib.h
+ *
+ * $Id: stdlib.h 2051 2009-08-27 20:55:09Z akoehler $
+ */
+/* Embedded Xinu, Copyright (C) 2009.  All rights reserved. */
+
+#define RAND_MAX 2147483646
+
+int abs(int);
+long labs(long);
+int atoi(char *);
+long atol(char *);
+void bzero(void *, int);
+void qsort(char *, unsigned int, int, int (*)(void));
+int rand(void);
+void srand(unsigned int);
+void *malloc(unsigned int nbytes);
+void free(void *pmem);
diff --git a/include/string.h b/include/string.h
new file mode 100644
index 0000000..43ba7ec
--- /dev/null
+++ b/include/string.h
@@ -0,0 +1,10 @@
+/* string.h */
+
+extern	char	*strncpy(char *, const char *, int32);
+extern	char	*strncat(char *, const char *, int32);
+extern	int32	strncmp(const char *, const char *, int32);
+extern	char	*strchr(const char *, int32);
+extern	char	*strrchr(const char *, int32);
+extern	char	*strstr(const char *, const char *);
+extern	int32	strnlen(const char *, uint32);
+extern	int	strlen(char *str);
diff --git a/include/syscall.h b/include/syscall.h
new file mode 100644
index 0000000..8b818d3
--- /dev/null
+++ b/include/syscall.h
@@ -0,0 +1,60 @@
+/* Xinu system calls */
+
+enum {
+	XINU_NULLPROCESS = 0,
+	XINU_UPTIME,
+	XINU_PUTC,
+	XINU_CLOSE, /* Devices */
+	XINU_CONTROL,
+	XINU_GETC,
+	XINU_INIT,
+	XINU_OPEN,
+	XINU_READ,
+	XINU_SEEK,
+	XINU_WRITE,
+
+	XINU_CREATE, /* Processes */ 
+	XINU_CHPRIO,
+	XINU_KILL,	/* Exit */
+	XINU_GETPRIO,
+	XINU_READY,
+	XINU_RECEIVE,
+	XINU_RECVCLR,
+	XINU_RECVTIME,
+	XINU_RESCHED_CNTL,
+	XINU_RESUME,
+	XINU_SEND,
+	XINU_SIGNAL,
+	XINU_SIGNALN,
+	XINU_SLEEP,
+	XINU_SLEEPMS,
+	XINU_SUSPEND,
+	XINU_UNSLEEP,
+	XINU_WAKE,
+	XINU_WAKEUP, 
+	XINU_YIELD,
+	
+	XINU_MKBUFPOOL, /* Buffers */
+	XINU_FREEBUF,
+	XINU_FREEMEM,
+	XINU_GETBUF,
+	
+	XINU_KPRINTF, /* Kernel */
+	XINU_KPUTC,
+	XINU_GETDEV,
+	XINU_GETMEM,
+	XINU_GETSTK,
+	
+	XINU_PTCOUNT, /* Ports */
+	XINU_PTCREATE,
+	XINU_PTDELETE,
+	XINU_PTINIT,
+	XINU_PTRCV,
+	XINU_PTRESET,
+	
+	XINU_SEMCOUNT, /* Semaphores */
+	XINU_SEMCREATE,
+	XINU_SEMRESET,
+	XINU_SEMDELET,
+
+};
diff --git a/include/testsuite.h b/include/testsuite.h
new file mode 100644
index 0000000..3ce0539
--- /dev/null
+++ b/include/testsuite.h
@@ -0,0 +1,38 @@
+/* testsuite.h - failif */
+
+process	test_addargs(bool8);
+process	test_bigargs(bool8);
+process	test_schedule(bool8 verbose);
+process	test_preempt(bool8 verbose);
+process	test_recursion(bool8 verbose);
+process	test_semaphore(bool8 verbose);
+process	test_semaphore2(bool8 verbose);
+process	test_semaphore3(bool8 verbose);
+process	test_semaphore4(bool8 verbose);
+process	test_semaphore5(bool8 verbose);
+process	test_libStdio(bool8 verbose);
+
+void	testPass(bool8, const char *);
+void	testFail(bool8, const char *);
+void	testSkip(bool8, const char *);
+void	testPrint(bool8, const char *);
+
+/*------------------------------------------------------------------------
+ * failif - report failure by displaying a message is condition is met
+ *------------------------------------------------------------------------
+ */
+#define	failif(cond, failmsg) \
+	if ( cond ) { testFail(verbose, failmsg); passed = FALSE; } \
+	else { testPass(verbose, ""); }
+
+/* Define the strcuture of an entry in the table of test cases */
+
+struct	testcase {
+    char	*name;		/* Name of test case			*/
+    process	(*test) (bool8);/* Test case function			*/
+};
+
+extern	int	ntests;		/* total number of tests		*/
+extern	struct	testcase testtab[]; /* table of test cases		*/
+
+#define	TESTSTK	8192		/* size of process stack used for test	*/
diff --git a/include/tftp.h b/include/tftp.h
new file mode 100644
index 0000000..184d50a
--- /dev/null
+++ b/include/tftp.h
@@ -0,0 +1,67 @@
+/* tftp.h - definitions for trivial file transfer protocol */
+
+/* TFTP Packet Op codes */
+#define TFTP_RRQ   1   /* Read Request    */
+#define TFTP_WRQ   2   /* Write Request   */
+#define TFTP_DATA  3   /* Data Packet     */
+#define TFTP_ACK   4   /* Acknowledgement */
+#define TFTP_ERROR 5   /* Error           */
+
+/* TFTP Error Codes */
+#define TFTP_ERROR_NOT_DEFINED         0  /* Not defined, see error message (if any). */
+#define TFTP_ERROR_FILE_NOT_FOUND      1  /* File not found.                          */
+#define TFTP_ERROR_ACCESS_VIOLATION    2  /* Access violation.                        */
+#define TFTP_ERROR_DISK_FULL           3  /* Disk full or allocation exceeded.        */
+#define TFTP_ERROR_ILLEGAL_OP          4  /* Illegal TFTP operation.                  */
+#define TFTP_ERROR_UNKNOWN_TRANSFER_ID 5  /* Unknown transfer ID.                     */
+#define TFTP_ERROR_FILE_EXISTS         6  /* File already exists.                     */
+#define TFTP_ERROR_NO_SUCH_USER        7  /* No such user.                            */
+
+#define TFTP_PORT       69      /* UDP Port for TFTP            */
+#define	TFTP_MAXNAM	    64      /* Max length of a file name    */
+#define	TFTP_MAXDATA    512     /* Max size of a data packet    */
+#define	TFTP_MAXRETRIES	3       /* Number of retranmissions     */
+#define	TFTP_WAIT       5000    /* Time to wait for reply (ms)  */
+
+/* Xinu Specific Flags */
+#define TFTP_NON_VERBOSE 0  /* Do not use verbose output */
+#define TFTP_VERBOSE     1  /* Use verbose output        */
+
+/* Format of a TFTP message (items following opcode depend on msg type)	*/
+
+#pragma pack(1)
+struct	tftp_msg {
+	uint16		tf_opcode;	/* One of the opcodes above	*/
+	union {
+
+	 /* Items in a RRQ or WRQ message */
+
+	 struct	{
+	  char	tf_filemode[TFTP_MAXNAM+10]; /* file name and mode	*/
+	 };
+
+	 /* Items in a Data packet */
+
+	 struct {
+	  uint16	tf_dblk;	/* Block number of this data	*/
+	  char		tf_data[TFTP_MAXDATA]; /* Actual data		*/
+	 };
+
+	 /* Items in an ACK packet */
+
+	 struct {
+	  uint16	tf_ablk;	/* Block number being acked	*/
+	 };
+
+	/* Items in an Error packet */
+
+	 struct {
+	  uint16	tf_ercode;	/* Integer error code		*/
+	  char		tf_ermsg[TFTP_MAXDATA]; /* Error message	*/
+	 };
+	};
+};
+#pragma pack()
+
+status tftpget(uint32 serverip, const char* filename, char* rcv_buf, uint32 rcv_buf_size, byte verbose);
+status tftpget_mb(uint32 serverip, const char* filename, char** rcv_bufs, uint32* rcv_buf_sizes, uint32 rcv_buf_count, byte verbose);
\ No newline at end of file
diff --git a/include/timer.h b/include/timer.h
new file mode 100644
index 0000000..f8f1d51
--- /dev/null
+++ b/include/timer.h
@@ -0,0 +1,37 @@
+/* STM32 Timer
+General purpose timer */
+
+extern	uint32	clktime;	/* current time in secs since boot	*/
+extern  uint32  count1000;      /* ms since last clock tick             */
+
+extern	qid16	sleepq;		/* queue for sleeping processes		*/
+extern	int32	slnonempty;	/* nonzero if sleepq is nonempty	*/
+extern	int32	*sltop;		/* ptr to key in first item on sleepq	*/
+extern	uint32	preempt;	/* preemption counter			*/
+
+#define TIM2_BASE	0x40000000
+#define	TIM2_IRQ	44
+
+#define TIM_CEN		0
+#define	TIM_UDIS 	1
+#define TIM_URS		2
+
+#define	TIM_UDE		8
+#define TIM_UIE		7	/* */
+
+#define TIM_UIF		0	/* Update interrupt flag*/
+
+struct timer_csreg {
+	volatile uint32 cr1;
+	volatile uint32 cr2;
+	volatile uint32 smcr;
+	volatile uint32 dier;
+	volatile uint32 sr;
+	volatile uint32 egr;
+	volatile uint32 ccmr1;
+	volatile uint32 ccmr2;
+	volatile uint32	ccer;
+	volatile uint32 cnt;
+	volatile uint32 psc;
+	volatile uint32 arr;
+};
diff --git a/include/tty.h b/include/tty.h
new file mode 100644
index 0000000..f64e739
--- /dev/null
+++ b/include/tty.h
@@ -0,0 +1,84 @@
+/* tty.h */
+
+#define	TY_OBMINSP	1		/* Min space in buffer before	*/
+					/*   processes awakened to write*/
+#define	TY_EBUFLEN	1		/* Size of echo queue		*/
+
+/* Size constants */
+
+#ifndef	Ntty
+#define	Ntty		1		/* Number of serial tty lines	*/
+#endif
+#ifndef	TY_IBUFLEN
+#define	TY_IBUFLEN	5		/* Num. chars in input queue	*/
+#endif
+#ifndef	TY_OBUFLEN
+#define	TY_OBUFLEN	5		/* Num.	chars in output	queue	*/
+#endif
+
+/* Mode constants for input and output modes */
+
+#define	TY_IMRAW	'R'		/* Raw input mode => no edits	*/
+#define	TY_IMCOOKED	'C'		/* Cooked mode => line editing	*/
+#define	TY_IMCBREAK	'K'		/* Honor echo, etc, no line edit*/
+#define	TY_OMRAW	'R'		/* Raw output mode => no edits	*/
+
+struct	ttycblk	{			/* Tty line control block	*/
+	char	*tyihead;		/* Next input char to read	*/
+	char	*tyitail;		/* Next slot for arriving char	*/
+	char	tyibuff[TY_IBUFLEN];	/* Input buffer (holds one line)*/
+	sid32	tyisem;			/* Input semaphore		*/
+	char	*tyohead;		/* Next output char to xmit	*/
+	char	*tyotail;		/* Next slot for outgoing char	*/
+	char	tyobuff[TY_OBUFLEN];	/* Output buffer		*/
+	sid32	tyosem;			/* Output semaphore		*/
+	char	*tyehead;		/* Next echo char to xmit	*/
+	char	*tyetail;		/* Next slot to deposit echo ch	*/
+	char	tyebuff[TY_EBUFLEN];	/* Echo buffer			*/
+	char	tyimode;		/* Input mode raw/cbreak/cooked	*/
+	bool8	tyiecho;		/* Is input echoed?		*/
+	bool8	tyieback;		/* Do erasing backspace on echo?*/
+	bool8	tyevis;			/* Echo control chars as ^X ?	*/
+	bool8	tyecrlf;		/* Echo CR-LF for newline?	*/
+	bool8	tyicrlf;		/* Map '\r' to '\n' on input?	*/
+	bool8	tyierase;		/* Honor erase character?	*/
+	char	tyierasec;		/* Primary erase character	*/
+	char	tyierasec2;		/* Alternate erase character	*/
+	bool8	tyeof;			/* Honor EOF character?		*/
+	char	tyeofch;		/* EOF character (usually ^D)	*/
+	bool8	tyikill;		/* Honor line kill character?	*/
+	char	tyikillc;		/* Line kill character		*/
+	int32	tyicursor;		/* Current cursor position	*/
+	bool8	tyoflow;		/* Honor ostop/ostart?		*/
+	bool8	tyoheld;		/* Output currently being held?	*/
+	char	tyostop;		/* Character that stops output	*/
+	char	tyostart;		/* Character that starts output	*/
+	bool8	tyocrlf;		/* Output CR/LF for LF ?	*/
+	char	tyifullc;		/* Char to send when input full	*/
+};
+// extern	struct	ttycblk	ttytab[];
+
+/* Characters with meaning to the tty driver */
+
+#define	TY_BACKSP	'\b'		/* Backspace character		*/
+#define	TY_BACKSP2	'\177'		/* Alternate backspace char.	*/
+#define	TY_BELL		'\07'		/* Character for audible beep	*/
+#define	TY_EOFCH	'\04'		/* Control-D is EOF on input	*/
+#define	TY_BLANK	' '		/* Blank			*/
+#define	TY_NEWLINE	'\n'		/* Newline == line feed		*/
+#define	TY_RETURN	'\r'		/* Carriage return character	*/
+#define	TY_STOPCH	'\023'		/* Control-S stops output	*/
+#define	TY_STRTCH	'\021'		/* Control-Q restarts output	*/
+#define	TY_KILLCH	'\025'		/* Control-U is line kill	*/
+#define	TY_UPARROW	'^'		/* Used for control chars (^X)	*/
+#define	TY_FULLCH	TY_BELL		/* Char to echo when buffer full*/
+
+/* Tty control function codes */
+
+#define	TC_NEXTC	3		/* Look ahead 1 character	*/
+#define	TC_MODER	4		/* Set input mode to raw	*/
+#define	TC_MODEC	5		/* Set input mode to cooked	*/
+#define	TC_MODEK	6		/* Set input mode to cbreak	*/
+#define	TC_ICHARS	8		/* Return number of input chars	*/
+#define	TC_ECHO		9		/* Turn on echo			*/
+#define	TC_NOECHO	10		/* Turn off echo		*/
diff --git a/include/uart.h b/include/uart.h
new file mode 100644
index 0000000..eb845e6
--- /dev/null
+++ b/include/uart.h
@@ -0,0 +1,45 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+/* Control register */
+#define UART_EN		13 
+#define UART_INTR_RX	5
+#define UART_INTR_TCIE	6
+#define UART_INTR_TX	7
+#define UART_TX_EN 	3
+#define UART_RX_EN 	2
+
+#define PARITY		12
+
+/* Status register */
+#define UART_RXNE	0x20
+#define UART_TC		0x40
+#define UART_TC_TXE	0xC0
+
+#define UART_TEST	6
+
+#define UART_FIFO_SIZE	1
+#define UARTBUF 256
+#define ECHO 1
+
+struct uart_csreg {
+	volatile uint32 sr;
+	volatile uint32 dr;
+	volatile uint32 brr;
+	volatile uint32 cr1;
+	volatile uint32 cr2;
+	volatile uint32 cr3;
+	volatile uint32 gtr;
+};
+
diff --git a/include/udp.h b/include/udp.h
new file mode 100644
index 0000000..62302a1
--- /dev/null
+++ b/include/udp.h
@@ -0,0 +1,33 @@
+/* udp.h - Declarations pertaining to User Datagram Protocol (UDP) */
+
+#define	UDP_SLOTS	6 		/* Number of open UDP endpoints */
+#define	UDP_QSIZ	8		/* Packets enqueued per endpoint*/
+
+#define	UDP_DHCP_CPORT	68		/* Port number for DHCP client	*/
+#define	UDP_DHCP_SPORT	67		/* Port number for DHCP server	*/
+
+/* Constants for the state of an entry */
+
+#define	UDP_FREE	0 		/* Entry is unused		*/
+#define	UDP_USED	1		/* Entry is being used		*/
+#define	UDP_RECV	2		/* Entry has a process waiting	*/
+
+#define	UDP_ANYIF	-2		/* Register an endpoint for any	*/
+					/*   interface on the machine	*/
+
+#define UDP_HDR_LEN	8		/* Bytes in a UDP header	*/
+
+struct	udpentry {			/* Entry in the UDP endpoint tbl*/
+	int32	udstate;		/* State of entry: free/used	*/
+	uint32	udremip;		/* Remote IP address (zero	*/
+					/*   means "don't care")	*/
+	uint16	udremport;		/* Remote protocol port number	*/
+	uint16	udlocport;		/* Local protocol port number	*/
+	int32	udhead;			/* Index of next packet to read	*/
+	int32	udtail;			/* Index of next slot to insert	*/
+	int32	udcount;		/* Count of packets enqueued	*/
+	pid32	udpid;			/* ID of waiting process	*/
+	struct	netpacket *udqueue[UDP_QSIZ];/* Circular packet queue	*/
+};
+
+extern	struct	udpentry udptab[];
diff --git a/include/userland.h b/include/userland.h
new file mode 100644
index 0000000..eb300e9
--- /dev/null
+++ b/include/userland.h
@@ -0,0 +1,6 @@
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <syscall.h>
+#include <string.h>
diff --git a/include/xinu.h b/include/xinu.h
new file mode 100644
index 0000000..d3cde23
--- /dev/null
+++ b/include/xinu.h
@@ -0,0 +1,51 @@
+/* xinu.h - include all system header files */
+
+// RAFA
+extern void notmain(void);
+typedef unsigned int size_t;
+void blink_avr();
+#include <messages.h>
+
+// FIN DE RAFA
+
+
+#include <kernel.h>
+#include <cortexm3.h> 	/* Cortex M3 Processor */
+#include <conf.h>
+#include <process.h>
+#include <queue.h>
+#include <resched.h>
+#include <semaphore.h>
+#include <memory.h>
+#include <bufpool.h>
+#include <mark.h>
+#include <ports.h>
+#include <clk.h> 	/* STM32 Clock system */
+#include <timer.h>	/* STM32 Timer peripheral */
+#include <uart.h>	/* STM32 UART peripheral */
+#include <tty.h>
+#include <gpio.h>	/* STM32 GPIO peripherals */
+#include <gpioselect.h>
+#include <device.h>
+#include <interrupt.h>
+#include <file.h>
+#include <rfilesys.h>
+#include <rdisksys.h>
+#include <lfilesys.h>
+#include <spi.h>
+#include <ether.h>
+#include <net.h>
+#include <ip.h>
+#include <arp.h>
+#include <udp.h>
+#include <dhcp.h>
+#include <icmp.h>
+#include <tftp.h>
+#include <name.h>
+#include <shell.h>
+#include <date.h>
+#include <prototypes.h>
+#include <delay.h>
+#include <stdio.h>
+#include <string.h>
+#include <syscall.h>
diff --git a/lib/ctype_.c b/lib/ctype_.c
new file mode 100644
index 0000000..943dd94
--- /dev/null
+++ b/lib/ctype_.c
@@ -0,0 +1,32 @@
+/* ctype_.c - _ctype_ */
+
+#include	<ctype.h>
+
+/*------------------------------------------------------------------------
+ *  _ctype_  -  Provides _ctype_.
+ *------------------------------------------------------------------------
+ */
+#include <avr/io.h>
+typedef unsigned int size_t;
+#include <avr/pgmspace.h>
+const char _ctype_[] PROGMEM = {
+    0,
+    _C, _C, _C, _C, _C, _C, _C, _C,
+    _C, _S, _S, _S, _S, _S, _C, _C,
+    _C, _C, _C, _C, _C, _C, _C, _C,
+    _C, _C, _C, _C, _C, _C, _C, _C,
+    _S, _P, _P, _P, _P, _P, _P, _P,
+    _P, _P, _P, _P, _P, _P, _P, _P,
+    _N, _N, _N, _N, _N, _N, _N, _N,
+    _N, _N, _P, _P, _P, _P, _P, _P,
+    _P, _U | _X, _U | _X, _U | _X, _U | _X, _U | _X, _U | _X,
+    _U,
+    _U, _U, _U, _U, _U, _U, _U, _U,
+    _U, _U, _U, _U, _U, _U, _U, _U,
+    _U, _U, _U, _P, _P, _P, _P, _P,
+    _P, _L | _X, _L | _X, _L | _X, _L | _X, _L | _X, _L | _X,
+    _L,
+    _L, _L, _L, _L, _L, _L, _L, _L,
+    _L, _L, _L, _L, _L, _L, _L, _L,
+    _L, _L, _L, _P, _P, _P, _P, _C
+};
diff --git a/lib/doprnt.c b/lib/doprnt.c
new file mode 100644
index 0000000..5ef71cc
--- /dev/null
+++ b/lib/doprnt.c
@@ -0,0 +1,432 @@
+/* dprnt.c - _doprnt, _prtl2, _prtl8, _prtl10, _prtX16, _prtl16 */
+
+#include <stdarg.h>
+
+#define	MAXSTR	80
+#define NULL    0
+#define PRECISION 6
+
+  void _prtl10(long num, char *str);
+  void _prtl8(long num, char *str);
+  void _prtX16(long num, char *str);
+  void _prtl16(long num, char *str);
+  void _prtl2(long num, char *str);
+//  void _prtdbl(double num, int precision, char *str);
+
+/*------------------------------------------------------------------------
+ *  _doprnt  -  Format and write output using 'func' to write characters.
+ *				(Patched for Sun3 by Shawn Ostermann.)
+ *				All arguments passed as 4 bytes, long==int.
+ *------------------------------------------------------------------------
+ */
+void	_doprnt(
+	  char			*fmt,
+	  va_list		ap,
+	  int			(*func)(int)
+	)
+{
+    int c;
+    int i;
+    int f;                      /* The format character (comes after %) */
+    char *str;                  /* Running pointer in string            */
+    char string[20];            /* The string str points to this output */
+
+    /*  from number conversion              */
+    int length;                 /* Length of string "str"               */
+    char fill;                  /* Fill character (' ' or '0')          */
+    int leftjust;               /* 0 = right-justified, else left-just  */
+    int fmax, fmin;             /* Field specifications % MIN . MAX s   */
+    int leading;                /* No. of leading/trailing fill chars   */
+    char sign;                  /* Set to '-' for negative decimals     */
+    char digit1;                /* Offset to add to first numeric digit */
+    long larg;
+    double darg;
+
+    for (;;)
+    {
+        /* Echo characters until '%' or end of fmt string */
+        while ((c = *fmt++) != '%')
+        {
+            if (c == '\0')
+            {
+                return;
+            }
+            (*func) (c);
+        }
+        /* Echo "...%%..." as '%' */
+        if (*fmt == '%')
+        {
+            (*func) (*fmt++);
+            continue;
+        }
+        /* Check for "%-..." == Left-justified output */
+        if ((leftjust = ((*fmt == '-')) ? 1 : 0))
+        {
+            fmt++;
+        }
+        /* Allow for zero-filled numeric outputs ("%0...") */
+        fill = (*fmt == '0') ? *fmt++ : ' ';
+        /* Allow for minimum field width specifier for %d,u,x,o,c,s */
+        /* Also allow %* for variable width (%0* as well)       */
+        fmin = 0;
+        if (*fmt == '*')
+        {
+            fmin = va_arg(ap, int);
+
+            ++fmt;
+        }
+        else
+        {
+            while ('0' <= *fmt && *fmt <= '9')
+            {
+                fmin = fmin * 10 + *fmt++ - '0';
+            }
+        }
+        /* Allow for maximum string width for %s */
+        fmax = 0;
+        if (*fmt == '.')
+        {
+            if (*(++fmt) == '*')
+            {
+                fmax = va_arg(ap, int);
+                ++fmt;
+            }
+            else
+            {
+                while ('0' <= *fmt && *fmt <= '9')
+                {
+                    fmax = fmax * 10 + *fmt++ - '0';
+                }
+            }
+        }
+
+        str = string;
+        if ((f = *fmt++) == '\0')
+        {
+            (*func) ('%');
+            return;
+        }
+        sign = '\0';            /* sign == '-' for negative decimal */
+
+        switch (f)
+        {
+        case 'c':
+            string[0] = va_arg(ap, int);
+            string[1] = '\0';
+            fmax = 0;
+            fill = ' ';
+            break;
+
+        case 's':
+            str = va_arg(ap, char *);
+
+            if (NULL == str)
+            {
+                str = "(null)";
+            }
+            fill = ' ';
+            break;
+
+        case 'd':
+            larg = va_arg(ap, long);
+
+            if (larg < 0)
+            {
+                sign = '-';
+            }
+            _prtl10(larg, str);
+            break;
+            
+        case 'f':
+           // darg = va_arg(ap, double);
+
+           // if (darg < 0)
+           // {
+           //     sign = '-';
+           // }
+           // _prtdbl(darg, PRECISION, str);
+            break;
+
+        case 'u':
+            digit1 = '\0';
+            /* "negative" longs in unsigned format  */
+            /* can't be computed with long division */
+            /* convert *args to "positive", digit1  */
+            /* = how much to add back afterwards    */
+            larg = va_arg(ap, long);
+
+            while (larg < 0)
+            {
+                larg -= 1000000000L;
+                ++digit1;
+            }
+            _prtl10(larg, str);
+            str[0] += digit1;
+            fmax = 0;
+            break;
+
+        case 'o':
+            larg = va_arg(ap, long);
+
+            _prtl8(larg, str);
+            fmax = 0;
+            break;
+
+        case 'X':
+            larg = va_arg(ap, long);
+
+            _prtX16(larg, str);
+            fmax = 0;
+            break;
+
+        case 'x':
+            larg = va_arg(ap, long);
+
+            _prtl16(larg, str);
+            fmax = 0;
+            break;
+
+        case 'H':
+            larg = va_arg(ap, long);
+
+            _prtX16(larg, str);
+
+            larg = va_arg(ap, long);
+
+            _prtX16(larg, str + 8);
+
+            fmax = 0;
+            break;
+
+        case 'h':
+            larg = va_arg(ap, long);
+
+            _prtl16(larg, str);
+
+            larg = va_arg(ap, long);
+
+            _prtl16(larg, str + 8);
+
+            fmax = 0;
+            break;
+
+        case 'b':
+            larg = va_arg(ap, long);
+
+            _prtl2(larg, str);
+            fmax = 0;
+            break;
+
+        default:
+            (*func) (f);
+            break;
+        }
+        for (length = 0; str[length] != '\0'; length++)
+        {;
+        }
+        if (fmin > MAXSTR || fmin < 0)
+        {
+            fmin = 0;
+        }
+        if (fmax > MAXSTR || fmax < 0)
+        {
+            fmax = 0;
+        }
+        leading = 0;
+        if (fmax != 0 || fmin != 0)
+        {
+            if (fmax != 0)
+            {
+                if (length > fmax)
+                {
+                    length = fmax;
+                }
+            }
+            if (fmin != 0)
+            {
+                leading = fmin - length;
+            }
+            if (sign == '-')
+            {
+                --leading;
+            }
+        }
+        if (sign == '-' && fill == '0')
+        {
+            (*func) (sign);
+        }
+        if (leftjust == 0)
+        {
+            for (i = 0; i < leading; i++)
+            {
+                (*func) (fill);
+            }
+        }
+        if (sign == '-' && fill == ' ')
+        {
+            (*func) (sign);
+        }
+        for (i = 0; i < length; i++)
+        {
+            (*func) (str[i]);
+        }
+        if (leftjust != 0)
+        {
+            for (i = 0; i < leading; i++)
+                (*func) (fill);
+        }
+    }
+
+}
+
+/*------------------------------------------------------------------------
+ *  _prtl10  -  Converts long to base 10 string.
+ *------------------------------------------------------------------------
+ */
+  void		_prtl10(
+				  long		num, 
+				  char		*str
+				)
+{
+    int i;
+    char temp[11];
+
+    temp[0] = '\0';
+    temp[1] = ((num<0) ? -(num%10) : (num%10)) + '0';
+    num /= (num<0) ? -10 : 10;
+    for (i = 2; i <= 10; i++) {
+        temp[i] = num % 10 + '0';
+        num /= 10;
+    }
+    for (i = 10; temp[i] == '0'; i--);
+    if (i == 0)
+        i++;
+    while (i >= 0)
+        *str++ = temp[i--];
+}
+
+/*------------------------------------------------------------------------
+ *  _prtl8  -  Converts long to base 8 string.
+ *------------------------------------------------------------------------
+ */
+  void	_prtl8(
+		  long		num,
+		  char		*str
+		)
+{
+    int i;
+    char temp[12];
+
+    temp[0] = '\0';
+    for (i = 1; i <= 11; i++)
+    {
+        temp[i] = (num & 07) + '0';
+        num = num >> 3;
+    }
+    temp[11] &= '3';
+    for (i = 11; temp[i] == '0'; i--);
+    if (i == 0)
+        i++;
+    while (i >= 0)
+        *str++ = temp[i--];
+}
+
+/*------------------------------------------------------------------------
+ *  _prtl16  -  Converts long to lowercase hex string.
+ *------------------------------------------------------------------------
+ */
+  void	_prtl16(
+		  long		num,
+		  char		*str
+		)
+{
+    int i;
+    char temp[9];
+
+    temp[0] = '\0';
+    for (i = 1; i <= 8; i++)
+    {
+        temp[i] = "0123456789abcdef"[num & 0x0F];
+        num = num >> 4;
+    }
+    for (i = 8; temp[i] == '0'; i--);
+    if (i == 0)
+        i++;
+    while (i >= 0)
+        *str++ = temp[i--];
+}
+
+/*------------------------------------------------------------------------
+ *  _prtX16  -  Converts long to uppercase hex string.
+ *------------------------------------------------------------------------
+ */
+  void	_prtX16(
+		  long		num,
+		  char		*str
+		)
+{
+    int i;
+    char temp[9];
+
+    temp[0] = '\0';
+    for (i = 1; i <= 8; i++)
+    {
+        temp[i] = "0123456789ABCDEF"[num & 0x0F];
+        num = num >> 4;
+    }
+    for (i = 8; temp[i] == '0'; i--);
+    if (i == 0)
+        i++;
+    while (i >= 0)
+        *str++ = temp[i--];
+}
+
+/*------------------------------------------------------------------------
+ *  _prtl2  -  Converts long to binary string.
+ *------------------------------------------------------------------------
+ */
+  void	_prtl2(
+		  long		num,
+		  char		*str
+		)
+{
+    int i;
+    char temp[35];
+
+    temp[0] = '\0';
+    for (i = 1; i <= 32; i++)
+    {
+        temp[i] = ((num % 2) == 0) ? '0' : '1';
+        num = num >> 1;
+    }
+    for (i = 32; temp[i] == '0'; i--);
+    if (i == 0)
+        i++;
+    while (i >= 0)
+        *str++ = temp[i--];
+}
+
+/*------------------------------------------------------------------------
+ *  _prtdbl  -  Converts double to binary string.
+ *------------------------------------------------------------------------
+ */
+//  void	_prtdbl(
+//		  double	num,
+//		  int		precision,
+//		  char		*str
+//		)
+//{
+//    int i,mp;
+//    long w,p;
+// 
+//	for(i = 0, mp = 1; i < precision; i++, mp *= 10);
+//    
+//    num = ((num<0) ? -(num) : (num));
+//    w = (long)(num);
+//    p = (long)(num * mp) - (long)(w * mp);
+//    
+//    _prtl10(w, str);
+//    while(*str != '\0') { str++; }
+//    *str++ = '.';
+//    _prtl10(p, str);
+//}
diff --git a/lib/doscan.c b/lib/doscan.c
new file mode 100644
index 0000000..920e6e4
--- /dev/null
+++ b/lib/doscan.c
@@ -0,0 +1,406 @@
+/* doscan.c - _doscan, _innum, _instr, _getccl */
+
+/* Character look-ahead to be implemented as: ch=control(unit,TTY_IOC_NEXTC) */
+
+#include <ctype.h>
+
+#define EOF     (-2)
+#define	NULL	0
+
+#define	SPC	01
+#define	STP	02
+
+#define	SHORT	0
+#define	REGULAR	1
+#define	LONG	2
+
+static int _innum(int **, int, int, int, int (*getc) (int, int),
+                  int (*ungetc) (int, int), int, int, int *);
+static int _instr(register char *, int, int, int (*getc) (int, int),
+                  int (*ungetc) (int, int), int, int, int *);
+static char *_getccl(char *);
+
+char _sctab[128] = {
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, SPC, SPC, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    SPC, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0,
+};
+
+/*------------------------------------------------------------------------
+ *  _doscan  -  Scan and recognize input according to a format.
+ *------------------------------------------------------------------------
+ */
+int	_doscan(
+	  register char	*fmt,			/* format str for scanf	*/
+	  register int	**argp,			/* arguments to scanf	*/
+          int		(*getch)(int, int),	/* function to get char	*/
+	  int		(*ungetch)(int, int),/* function to unget char	*/
+          int		arg1,			/* arg to getch/ungetch	*/
+	  int		arg2			/* 2nd arg to getch/unge*/
+	)
+{
+    register int ch;
+    int nmatch, len, ch1;
+    int **ptr, fileended, size;
+
+    nmatch = 0;
+    fileended = 0;
+    for (;;)
+    {
+        switch (ch = *fmt++)
+        {
+        case '\0':
+            return (nmatch);
+        case '%':
+            if ((ch = *fmt++) == '%')
+            {
+                goto def;
+            }
+            ptr = 0;
+            if (ch != '*')
+            {
+                ptr = argp++;
+            }
+            else
+            {
+                ch = *fmt++;
+            }
+            len = 0;
+            size = REGULAR;
+            while (isdigit(ch))
+            {
+                len = len * 10 + ch - '0';
+                ch = *fmt++;
+            }
+            if (len == 0)
+            {
+                len = 30000;
+            }
+            if (ch == 'l')
+            {
+                ch = *fmt++;
+                size = LONG;
+            }
+            else if (ch == 'h')
+            {
+                size = SHORT;
+                ch = *fmt++;
+            }
+            else if (ch == '[')
+            {
+                fmt = _getccl(fmt);
+            }
+            if (isupper(ch))
+            {
+                ch = tolower(ch);
+                size = LONG;
+            }
+            if (ch == '\0')
+            {
+                return (-1);
+            }
+            if (_innum
+                (ptr, ch, len, size,
+                 getch, ungetch, arg1, arg2, &fileended) && ptr)
+            {
+                nmatch++;
+            }
+            if (fileended)
+            {
+                return (nmatch ? nmatch : -1);
+            }
+            break;
+
+        case ' ':
+        case '\n':
+        case '\t':
+            while ((ch1 =
+                    (*getch) (arg1,
+                              arg2)) == ' ' || ch1 == '\t' || ch1 == '\n')
+            {;
+            }
+            if (ch1 != EOF)
+            {
+                (*ungetch) (arg1, arg2);
+            }
+            break;
+
+        default:
+          def:
+            ch1 = (*getch) (arg1, arg2);
+            if (ch1 != ch)
+            {
+                if (ch1 == EOF)
+                {
+                    return (-1);
+                }
+                (*ungetch) (arg1, arg2);
+                return nmatch;
+            }
+        }
+    }
+}
+
+/*------------------------------------------------------------------------
+ *  _innum  -  DOCUMENT
+ *------------------------------------------------------------------------
+ */
+static int	_innum(
+		  int		**ptr,
+		  int		type,
+		  int		len,
+		  int		size,
+                  int		(*getch)(int, int),
+		  int		(*ungetch)(int, int),
+                  int		arg1,
+		  int		arg2,
+		  int		*eofptr
+		)
+{
+    extern double atof(char *p);
+    register char *np;
+    char numbuf[64];
+    register char c, base;
+    int negflg, c1, ndigit;
+    long lcval;
+
+    if (type == 'c' || type == 's' || type == '[')
+    {
+        return (_instr
+                (ptr ? *(char **)ptr : (char *)NULL, type, len, getch,
+                 ungetch, arg1, arg2, eofptr));
+    }
+    lcval = 0;
+    ndigit = 0;
+    base = 10;
+    if (type == 'o')
+    {
+        base = 8;
+    }
+    else if (type == 'x')
+    {
+        base = 16;
+    }
+    np = numbuf;
+    negflg = 0;
+    while ((c = (*getch) (arg1, arg2)) == ' ' || c == '\t' || c == '\n')
+    {;
+    }
+    if (c == '-')
+    {
+        negflg++;
+        *np++ = c;
+        c = (*getch) (arg1, arg2);
+        len--;
+    }
+    else if (c == '+')
+    {
+        len--;
+        c = (*getch) (arg1, arg2);
+    }
+
+    for (; --len >= 0; *np++ = c, c = (*getch) (arg1, arg2))
+    {
+        if (((isdigit(c)) || base == 16)
+            && (('a' <= c && c <= 'f') || ('A' <= c && c <= 'F')))
+        {
+            ndigit++;
+            if (base == 8)
+            {
+                lcval <<= 3;
+            }
+            else if (base == 10)
+            {
+                lcval = ((lcval << 2) + lcval) << 1;
+            }
+            else
+            {
+                lcval <<= 4;
+            }
+            c1 = c;
+            if ('0' <= c && c <= '9')
+            {
+                c -= '0';
+            }
+            else if ('a' <= c && c <= 'f')
+            {
+                c -= 'a' - 10;
+            }
+            else
+            {
+                c -= 'A' - 10;
+            }
+            lcval += c;
+            c = c1;
+            continue;
+        }
+        else
+        {
+            break;
+        }
+    }
+    if (negflg)
+    {
+        lcval = -lcval;
+    }
+    if (c != EOF)
+    {
+        (*ungetch) (arg1, arg2);
+        *eofptr = 0;
+    }
+    else
+    {
+        *eofptr = 1;
+    }
+    if (ptr == NULL || np == numbuf)
+    {
+        return 0;
+    }
+    *np++ = 0;
+    switch (size)
+    {
+    case SHORT:
+        **(short **)ptr = lcval;
+        break;
+
+    case REGULAR:
+        **(int **)ptr = lcval;
+        break;
+
+    case LONG:
+        **(long **)ptr = lcval;
+        break;
+    }
+    return 1;
+}
+
+/*------------------------------------------------------------------------
+ *  _instr  -  DOCUMENT
+ *------------------------------------------------------------------------
+ */
+static int	_instr(
+		  register char		*ptr,
+		  int			type,
+		  int			len,
+		  int			(*getch)(int, int),
+		  int			(*ungetch)(int, int),
+                  int			arg1,
+		  int			arg2,
+		  int			*eofptr
+		)
+{
+    register unsigned int ch;
+    register char *optr;
+    int ignstp;
+
+    *eofptr = 0;
+    optr = ptr;
+    if (type == 'c' && len == 30000)
+    {
+        len = 1;
+    }
+    ignstp = 0;
+    if (type == 's')
+    {
+        ignstp = SPC;
+    }
+    while (_sctab[ch = (*getch) (arg1, arg2)] & ignstp)
+    {
+        if (ch == EOF)
+        {
+            break;
+        }
+    }
+    ignstp = SPC;
+    if (type == 'c')
+    {
+        ignstp = 0;
+    }
+    else if (type == '[')
+    {
+        ignstp = STP;
+    }
+    while (ch != EOF && (_sctab[ch] & ignstp) == 0)
+    {
+        if (ptr)
+        {
+            *ptr++ = ch;
+        }
+        if (--len <= 0)
+        {
+            break;
+        }
+        ch = (*getch) (arg1, arg2);
+    }
+    if (ch != EOF)
+    {
+        if (len > 0)
+        {
+            (*ungetch) (arg1, arg2);
+        }
+        *eofptr = 0;
+    }
+    else
+    {
+        *eofptr = 1;
+    }
+    if (ptr && ptr != optr)
+    {
+        if (type != 'c')
+        {
+            *ptr++ = '\0';
+        }
+        return 1;
+    }
+    return 0;
+}
+
+/*------------------------------------------------------------------------
+ *  _getccl  -  DOCUMENT
+ *------------------------------------------------------------------------
+ */
+static char	*_getccl(
+		  char		*s
+		)
+{
+    int c, t;
+
+    t = 0;
+    if (*s == '^')
+    {
+        t++;
+        s++;
+    }
+    for (c = 0; c < 128; c++)
+    {
+        if (t)
+        {
+            _sctab[c] &= ~STP;
+        }
+        else
+        {
+            _sctab[c] |= STP;
+        }
+    }
+    while (((c = *s++) & 0177) != ']')
+    {
+        if (t)
+        {
+            _sctab[c++] |= STP;
+        }
+        else
+        {
+            _sctab[c++] &= ~STP;
+        }
+        if (c == 0)
+        {
+            return (--s);
+        }
+    }
+    return s;
+}
diff --git a/lib/messages.c b/lib/messages.c
new file mode 100644
index 0000000..aaf0d4f
--- /dev/null
+++ b/lib/messages.c
@@ -0,0 +1,14 @@
+
+typedef unsigned int size_t;
+#include <avr/pgmspace.h>
+
+
+const char m1[] PROGMEM = "\n\nMain process recreating shell\n\n";
+const char m2[] PROGMEM = "Port system ran out of message nodes";
+const char m3[] PROGMEM = "\n\nAll user processes have completed.\n\n";
+const char m4[] PROGMEM = "namespace: cannot mount device %d\r\n";
+const char m5[] PROGMEM = "namespace: device name %s too long\r\n";
+const char m6[] PROGMEM = "Can't startup system";
+
+
+
diff --git a/lib/original/abs.c b/lib/original/abs.c
new file mode 100644
index 0000000..667e667
--- /dev/null
+++ b/lib/original/abs.c
@@ -0,0 +1,14 @@
+/* abs.c - abs */
+
+/*------------------------------------------------------------------------
+ *  abs  -  Return the absolute value of an integer.
+ *------------------------------------------------------------------------
+ */
+int	abs(
+	  int		arg
+	)
+{
+    if (arg < 0)
+        arg = -arg;
+    return (arg);
+}
diff --git a/lib/original/atoi.c b/lib/original/atoi.c
new file mode 100644
index 0000000..317c59a
--- /dev/null
+++ b/lib/original/atoi.c
@@ -0,0 +1,34 @@
+/* atoi.c - atoi */
+
+/*------------------------------------------------------------------------
+ *  atoi  -  Converts an ascii value to an integer.
+ *------------------------------------------------------------------------
+ */
+int	atoi(
+	  char		*p
+	)
+{
+    int n = 0, f = 0;
+
+    for (;; p++)
+    {
+        switch (*p)
+        {
+        case ' ':
+        case '\t':
+            continue;
+        case '-':
+            f++;
+        case '+':
+            p++;
+        }
+        break;
+    }
+
+    while (*p >= '0' && *p <= '9')
+    {
+        n = n * 10 + *p++ - '0';
+    }
+
+    return (f ? -n : n);
+}
diff --git a/lib/original/atol.c b/lib/original/atol.c
new file mode 100644
index 0000000..7fd6d2d
--- /dev/null
+++ b/lib/original/atol.c
@@ -0,0 +1,35 @@
+/* atol.c - atol */
+
+/*------------------------------------------------------------------------
+ *  atol  -  Converts an ascii value to a long.
+ *------------------------------------------------------------------------
+ */
+long	atol(
+		  char		*p
+		)
+{
+    long n;
+    int f;
+
+    n = 0;
+    f = 0;
+    for (;; p++)
+    {
+        switch (*p)
+        {
+        case ' ':
+        case '\t':
+            continue;
+        case '-':
+            f++;
+        case '+':
+            p++;
+        }
+        break;
+    }
+    while (*p >= '0' && *p <= '9')
+    {
+        n = n * 10 + *p++ - '0';
+    }
+    return (f ? -n : n);
+}
diff --git a/lib/original/bzero.c b/lib/original/bzero.c
new file mode 100644
index 0000000..192e270
--- /dev/null
+++ b/lib/original/bzero.c
@@ -0,0 +1,24 @@
+/* bzero.c - bzero */
+
+/*------------------------------------------------------------------------
+ *  bzero  -  Clears a block of characters to 0s.
+ *------------------------------------------------------------------------
+ */
+void	bzero(
+	  void		*p,
+	  int		len
+	)
+{
+    int n;
+    char *pch = (char *)p;
+
+    if ((n = len) <= 0)
+    {
+        return;
+    }
+    do
+    {
+        *pch++ = 0;
+    }
+    while (--n);
+}
diff --git a/lib/original/fdoprnt.c b/lib/original/fdoprnt.c
new file mode 100644
index 0000000..ea9497d
--- /dev/null
+++ b/lib/original/fdoprnt.c
@@ -0,0 +1,371 @@
+/* fdoprnt.c - _fdoprnt, _prtl2, _prtl8, _prtl10, _prtX16, _prtl16 */
+
+#include <stdarg.h>
+
+#define	MAXSTR	80
+#define NULL    0
+
+static void _prtl10(long num, char *str);
+static void _prtl8(long num, char *str);
+static void _prtX16(long num, char *str);
+static void _prtl16(long num, char *str);
+static void _prtl2(long num, char *str);
+
+/*------------------------------------------------------------------------
+ *  _fdoprnt  -  Format and write output using 'func' to write characters.
+ *				 (Patched for Sun3 by Shawn Ostermann.)
+ *				 All arguments passed as 4 bytes, long==int.
+ *------------------------------------------------------------------------
+ */
+void	_fdoprnt(
+	  char		*fmt,			/* format string	*/
+	  va_list	ap,			/* ap list of values	*/
+	  int		(*func)(int, int),	/* char output function	*/
+	  int		farg			/* arg for char output	*/
+	)
+{
+    int c;
+    int i;
+    int f;                      /* The format character (comes after %) */
+    char *str;                  /* Running pointer in string            */
+    char string[20];            /* The string str points to this output */
+
+    /*  from number conversion              */
+    int length;                 /* Length of string "str"               */
+    char fill;                  /* Fill character (' ' or '0')          */
+    int leftjust;               /* 0 = right-justified, else left-just  */
+    int fmax, fmin;             /* Field specifications % MIN . MAX s   */
+    int leading;                /* No. of leading/trailing fill chars   */
+    char sign;                  /* Set to '-' for negative decimals     */
+    char digit1;                /* Offset to add to first numeric digit */
+    long larg;
+
+    for (;;)
+    {
+        /* Echo characters until '%' or end of fmt string */
+        while ((c = *fmt++) != '%')
+        {
+            if (c == '\0')
+            {
+                return;
+            }
+            (*func) (farg, c);
+        }
+        /* Echo "...%%..." as '%' */
+        if (*fmt == '%')
+        {
+            (*func) (farg, *fmt++);
+            continue;
+        }
+        /* Check for "%-..." == Left-justified output */
+        if ((leftjust = ((*fmt == '-')) ? 1 : 0))
+        {
+            fmt++;
+        }
+        /* Allow for zero-filled numeric outputs ("%0...") */
+        fill = (*fmt == '0') ? *fmt++ : ' ';
+        /* Allow for minimum field width specifier for %d,u,x,o,c,s */
+        /* Also allow %* for variable width (%0* as well)       */
+        fmin = 0;
+        if (*fmt == '*')
+        {
+            fmin = va_arg(ap, int);
+
+            ++fmt;
+        }
+        else
+        {
+            while ('0' <= *fmt && *fmt <= '9')
+            {
+                fmin = fmin * 10 + *fmt++ - '0';
+            }
+        }
+        /* Allow for maximum string width for %s */
+        fmax = 0;
+        if (*fmt == '.')
+        {
+            if (*(++fmt) == '*')
+            {
+                fmax = va_arg(ap, int);
+                ++fmt;
+            }
+            else
+            {
+                while ('0' <= *fmt && *fmt <= '9')
+                {
+                    fmax = fmax * 10 + *fmt++ - '0';
+                }
+            }
+        }
+
+        str = string;
+        if ((f = *fmt++) == '\0')
+        {
+            (*func) (farg, '%');
+            return;
+        }
+        sign = '\0';            /* sign == '-' for negative decimal */
+
+        switch (f)
+        {
+        case 'c':
+            string[0] = va_arg(ap, int);
+            string[1] = '\0';
+            fmax = 0;
+            fill = ' ';
+            break;
+
+        case 's':
+            str = va_arg(ap, char *);
+
+            if (NULL == str)
+            {
+                str = "(null)";
+            }
+            fill = ' ';
+            break;
+
+        case 'd':
+            larg = va_arg(ap, long);
+
+            if (larg < 0)
+            {
+                sign = '-';
+                larg = -larg;
+            }
+            _prtl10(larg, str);
+            break;
+
+        case 'u':
+            digit1 = '\0';
+            /* "negative" longs in unsigned format  */
+            /* can't be computed with long division */
+            /* convert *args to "positive", digit1  */
+            /* = how much to add back afterwards    */
+            larg = va_arg(ap, long);
+
+            while (larg < 0)
+            {
+                larg -= 1000000000L;
+                ++digit1;
+            }
+            _prtl10(larg, str);
+            str[0] += digit1;
+            fmax = 0;
+            break;
+
+        case 'o':
+            larg = va_arg(ap, long);
+
+            _prtl8(larg, str);
+            fmax = 0;
+            break;
+
+        case 'X':
+            larg = va_arg(ap, long);
+
+            _prtX16(larg, str);
+            fmax = 0;
+            break;
+
+        case 'x':
+            larg = va_arg(ap, long);
+
+            _prtl16(larg, str);
+            fmax = 0;
+            break;
+
+        case 'b':
+            larg = va_arg(ap, long);
+
+            _prtl2(larg, str);
+            fmax = 0;
+            break;
+
+        default:
+            (*func) (farg, f);
+            break;
+        }
+        for (length = 0; str[length] != '\0'; length++)
+        {;
+        }
+        if (fmin > MAXSTR || fmin < 0)
+        {
+            fmin = 0;
+        }
+        if (fmax > MAXSTR || fmax < 0)
+        {
+            fmax = 0;
+        }
+        leading = 0;
+        if (fmax != 0 || fmin != 0)
+        {
+            if (fmax != 0)
+            {
+                if (length > fmax)
+                {
+                    length = fmax;
+                }
+            }
+            if (fmin != 0)
+            {
+                leading = fmin - length;
+            }
+            if (sign == '-')
+            {
+                --leading;
+            }
+        }
+        if (sign == '-' && fill == '0')
+        {
+            (*func) (farg, sign);
+        }
+        if (leftjust == 0)
+        {
+            for (i = 0; i < leading; i++)
+            {
+                (*func) (farg, fill);
+            }
+        }
+        if (sign == '-' && fill == ' ')
+        {
+            (*func) (farg, sign);
+        }
+        for (i = 0; i < length; i++)
+        {
+            (*func) (farg, str[i]);
+        }
+        if (leftjust != 0)
+        {
+            for (i = 0; i < leading; i++)
+                (*func) (farg, fill);
+        }
+    }
+
+}
+
+/*------------------------------------------------------------------------
+ *  _prtl10  -  Converts long to base 10 string.
+ *------------------------------------------------------------------------
+ */
+static void	_prtl10(
+		  long		num,
+		  char		*str
+		)
+{
+    int i;
+    char temp[11];
+
+    temp[0] = '\0';
+    for (i = 1; i <= 10; i++)
+    {
+        temp[i] = num % 10 + '0';
+        num /= 10;
+    }
+    for (i = 10; temp[i] == '0'; i--);
+    if (i == 0)
+        i++;
+    while (i >= 0)
+        *str++ = temp[i--];
+}
+
+/*------------------------------------------------------------------------
+ *  _prtl8  -  Converts long to base 8 string.
+ *------------------------------------------------------------------------
+ */
+static void	_prtl8(
+		  long		num,
+		  char		*str
+		)
+{
+    int i;
+    char temp[12];
+
+    temp[0] = '\0';
+    for (i = 1; i <= 11; i++)
+    {
+        temp[i] = (num & 07) + '0';
+        num = num >> 3;
+    }
+    temp[11] &= '3';
+    for (i = 11; temp[i] == '0'; i--);
+    if (i == 0)
+        i++;
+    while (i >= 0)
+        *str++ = temp[i--];
+}
+
+/*------------------------------------------------------------------------
+ *  _prtl16  -  Converts long to lowercase hex string.
+ *------------------------------------------------------------------------
+ */
+static void	_prtl16(
+		  long		num,
+		  char		*str
+		)
+{
+    int i;
+    char temp[9];
+
+    temp[0] = '\0';
+    for (i = 1; i <= 8; i++)
+    {
+        temp[i] = "0123456789abcdef"[num & 0x0F];
+        num = num >> 4;
+    }
+    for (i = 8; temp[i] == '0'; i--);
+    if (i == 0)
+        i++;
+    while (i >= 0)
+        *str++ = temp[i--];
+}
+
+/*------------------------------------------------------------------------
+ *  _prtX16  -  Converts long to uppercase hex string.
+ *------------------------------------------------------------------------
+ */
+static void	_prtX16(
+		  long		num,
+		  char		*str
+		)
+{
+    int i;
+    char temp[9];
+
+    temp[0] = '\0';
+    for (i = 1; i <= 8; i++)
+    {
+        temp[i] = "0123456789ABCDEF"[num & 0x0F];
+        num = num >> 4;
+    }
+    for (i = 8; temp[i] == '0'; i--);
+    if (i == 0)
+        i++;
+    while (i >= 0)
+        *str++ = temp[i--];
+}
+
+/*------------------------------------------------------------------------
+ *  _prtl2  -  Converts long to binary string.
+ *------------------------------------------------------------------------
+ */
+static void	_prtl2(
+		  long		num,
+		  char		*str
+		)
+{
+    int i;
+    char temp[35];
+
+    temp[0] = '\0';
+    for (i = 1; i <= 32; i++)
+    {
+        temp[i] = ((num % 2) == 0) ? '0' : '1';
+        num = num >> 1;
+    }
+    for (i = 32; temp[i] == '0'; i--);
+    if (i == 0)
+        i++;
+    while (i >= 0)
+        *str++ = temp[i--];
+}
diff --git a/lib/original/fgetc.c b/lib/original/fgetc.c
new file mode 100644
index 0000000..337dadd
--- /dev/null
+++ b/lib/original/fgetc.c
@@ -0,0 +1,28 @@
+/* fgetc.c - fgetc */
+
+extern int getc(int);
+
+#ifndef	EOF
+#define EOF      (-2)
+#endif
+
+/*------------------------------------------------------------------------
+ *  fgetc  -  Read a character from a device (file).
+ *			  Return character read, EOF if error.
+ *------------------------------------------------------------------------
+ */
+int	fgetc(
+	  int		dev
+	)
+{
+    int result = (int)getc(dev);
+
+    if (0 > result)
+    {
+        return EOF;
+    }
+    else
+    {
+        return result;
+    }
+}
diff --git a/lib/original/fgets.c b/lib/original/fgets.c
new file mode 100644
index 0000000..6a6526a
--- /dev/null
+++ b/lib/original/fgets.c
@@ -0,0 +1,43 @@
+/* fgets.c - fgets */
+
+#ifndef	NULL
+#define NULL    0
+#endif
+extern int getc(int);
+
+/*------------------------------------------------------------------------
+ *  fgets  -  Read a newline-terminated string from device (file).
+ *------------------------------------------------------------------------
+ */
+char	*fgets(
+	  char		*s,		/* buffer for result		*/
+	  int		n,		/* maximum read length		*/
+	  int		dev		/* device to read from		*/
+	)
+{
+    int c = 0;
+    char *cs;
+
+    cs = s;
+
+    /* Read characters until maximum read length, */
+    /*  end of line, or end of file               */
+    while ((--n > 0) && ((c = getc(dev)) >= 0))
+    {
+        *cs++ = c;
+        if (('\n' == c) || ('\r' == c))
+        {
+            break;
+        }
+    }
+
+    /* Check for EOF or empty string */
+    if ((c < 0) && (cs == s))
+    {
+        return NULL;
+    }
+
+    /* Terminate string and return */
+    *cs++ = '\0';
+    return s;
+}
diff --git a/lib/original/fprintf.c b/lib/original/fprintf.c
new file mode 100644
index 0000000..b722940
--- /dev/null
+++ b/lib/original/fprintf.c
@@ -0,0 +1,28 @@
+/* fprintf.c - _fdoprnt */
+
+#include <xinu.h>
+#include <stdarg.h>
+
+extern void _fdoprnt(char *, va_list, int (*)(did32, char), int);
+
+/*------------------------------------------------------------------------
+ *  fprintf  -  Print a formatted message on specified device (file).
+ *			Return 0 if the output was printed successfully,
+ *			and -1 if an error occurred.
+ *------------------------------------------------------------------------
+ */
+int	fprintf(
+	  int		dev,		/* device to write to		*/
+	  char		*fmt,		/* format string		*/
+	  ...
+	)
+{
+    va_list ap;
+    syscall putc(did32, char);
+
+    va_start(ap, fmt);
+    _fdoprnt(fmt, ap, putc, dev);
+    va_end(ap);
+
+    return 0;
+}
diff --git a/lib/original/fputc.c b/lib/original/fputc.c
new file mode 100644
index 0000000..fd27c42
--- /dev/null
+++ b/lib/original/fputc.c
@@ -0,0 +1,30 @@
+/* fputc.c - fputc */
+
+extern int putc(int, char);
+
+#ifndef	SYSERR
+#define	SYSERR   (-1)
+#endif
+#ifndef	EOF
+#define EOF      (-2)
+#endif
+
+/*------------------------------------------------------------------------
+ *  fputc  -  Write a character string to a device (file).
+ *			  Return character written, EOF if error.
+ *------------------------------------------------------------------------
+ */
+int	fputc(
+	  int		c,		/* char to write		*/
+	  int		dev		/* device to use		*/
+	)
+{
+    if (SYSERR == (int)putc(dev, c))
+    {
+        return EOF;
+    }
+    else
+    {
+        return c;
+    }
+}
diff --git a/lib/original/fputs.c b/lib/original/fputs.c
new file mode 100644
index 0000000..4385b27
--- /dev/null
+++ b/lib/original/fputs.c
@@ -0,0 +1,27 @@
+/* fputs.c - fputs */
+
+
+
+// REALLY NEEDED?
+//extern int putc(int, char);
+extern int putc(int, char);
+
+
+/*------------------------------------------------------------------------
+ *  fputs  -  Write a null-terminated string to a device (file).
+ *			  Return result of last putc.
+ *------------------------------------------------------------------------
+ */
+int	fputs(
+	  char		*s,		/* string to write		*/
+	  int		dev		/* device to write to		*/
+	)
+{
+    int r = 0, c;
+
+    while ((c = (*s++)))
+    {
+	        r = putc(dev, c);
+    }
+    return r;
+}
diff --git a/lib/original/fscanf.c b/lib/original/fscanf.c
new file mode 100644
index 0000000..a64a9d0
--- /dev/null
+++ b/lib/original/fscanf.c
@@ -0,0 +1,69 @@
+/* fscanf.c - fscanf, getch, ungetch */
+
+#ifndef	EMPTY
+#define EMPTY (-1)
+#endif
+#ifndef	EOF
+#define EOF   (-2)
+#endif
+
+extern int getc(int);
+
+static int getch(int, int);
+static int ungetch(int, int);
+extern int _doscan(register char *, register int **,
+                   int (*getc) (int, int), int (*ungetc) (int, int), int,
+                   int);
+
+/*------------------------------------------------------------------------
+ *  fscanf  -  Read from a device (file) according to a format.
+ *			   Return result of _doscan.
+ *------------------------------------------------------------------------
+ */
+int	fscanf(
+	  int		dev,		/* device to use		*/
+	  char		*fmt,		/* format string		*/
+	  int		args		/* num of args in format	*/
+	)
+{
+    int buf;
+
+    buf = EMPTY;
+    return (_doscan
+            (fmt, (int **)&args, getch, ungetch, dev, (int)(int)&buf));
+}
+
+/*------------------------------------------------------------------------
+ *  getch  -  Get a character from a device with pushback.
+ *------------------------------------------------------------------------
+ */
+static int	getch(
+		  int		dev,	/* device to use		*/
+		  int		abuf	/* buffer to use		*/
+		)
+{
+    int *buf = (int *)abuf;
+
+    if (*buf != EOF && *buf != EMPTY)
+    {
+        *buf = getc(dev);
+    }
+/* 	if( *buf != EOF ) */
+/* 	{ *buf = control(dev, TTY_IOC_NEXTC, 0, 0); } */
+    return (*buf);
+}
+
+/*------------------------------------------------------------------------
+ *  ungetch  -  Pushback a character for getch.
+ *------------------------------------------------------------------------
+ */
+static int	ungetch(
+		  int		dev,	/* device to use		*/
+		  int		abuf	/* buffer to use		*/
+		)
+{
+    int *buf = (int *)abuf;
+
+    *buf = EMPTY;
+    return (*buf);
+}
diff --git a/lib/original/getchar.c b/lib/original/getchar.c
new file mode 100644
index 0000000..2915e08
--- /dev/null
+++ b/lib/original/getchar.c
@@ -0,0 +1,15 @@
+/* getchar.c - getchar */
+
+#include <xinu.h>
+#include <stdio.h>
+
+/*------------------------------------------------------------------------
+ *  getchar  -  DOCUMENT
+ *------------------------------------------------------------------------
+ */
+int	getchar(
+	  void
+	)
+{
+    return fgetc(stdin);
+}
diff --git a/lib/original/labs.c b/lib/original/labs.c
new file mode 100644
index 0000000..fdd2ca6
--- /dev/null
+++ b/lib/original/labs.c
@@ -0,0 +1,14 @@
+/* labs.c - labs */
+
+/*------------------------------------------------------------------------
+ *  labs  -  Calculates the absolute value of a long.
+ *------------------------------------------------------------------------
+ */
+long	labs(
+	  long		arg
+	)
+{
+    if (arg < 0)
+        arg = -arg;
+    return (arg);
+}
diff --git a/lib/original/memchr.c b/lib/original/memchr.c
new file mode 100644
index 0000000..e69de29
diff --git a/lib/original/memcmp.c b/lib/original/memcmp.c
new file mode 100644
index 0000000..d4e19ae
--- /dev/null
+++ b/lib/original/memcmp.c
@@ -0,0 +1,26 @@
+/* memcmp.c - memcmp */
+
+/*------------------------------------------------------------------------
+ *  memcmp  -  Compare two equal-size blocks of memory.  If there are no
+ *			differences, return 0.  Otherwise return >0 or <0
+ *			if the first differing byte is greater or less
+ *------------------------------------------------------------------------
+ */
+int	memcmp(
+	  const void	*s1,		/* first memory location	*/
+	  const void	*s2,		/* second memory location	*/
+	  int		n		/* length to compare		*/
+	)
+{
+    const unsigned char *c1;
+    const unsigned char *c2;
+
+    for (c1 = s1, c2 = s2; n > 0; n--, c1++, c2++)
+    {
+        if (*c1 != *c2)
+        {
+            return ((int)*c1) - ((int)*c2);
+        }
+    }
+    return 0;
+}
diff --git a/lib/original/memcpy.c b/lib/original/memcpy.c
new file mode 100644
index 0000000..da74590
--- /dev/null
+++ b/lib/original/memcpy.c
@@ -0,0 +1,23 @@
+/* memcpy.c - memcpy */
+
+/*------------------------------------------------------------------------
+ *  memcpy  -  Copy a block of memory from src to dst, and return a
+ *			  pointer to the destination
+ *------------------------------------------------------------------------
+ */
+void	*memcpy(
+	  void		*s,	/* Destination address			*/
+	  const void	*ct,	/* source address			*/
+	  int		n	/* number of bytes to copy		*/
+	)
+{
+    register int i;
+    char *dst = (char *)s;
+    char *src = (char *)ct;
+
+    for (i = 0; i < n; i++)
+    {
+        *dst++ = *src++;
+    }
+    return s;
+}
diff --git a/lib/original/memset.c b/lib/original/memset.c
new file mode 100644
index 0000000..da746cf
--- /dev/null
+++ b/lib/original/memset.c
@@ -0,0 +1,23 @@
+/* memset.c - memset */
+
+/*------------------------------------------------------------------------
+ *  memset  -  Set a block ot n bytes to the same value and return a
+ *			   pointer to the memory
+ *------------------------------------------------------------------------
+ */
+void	*memset(
+	  void		*s,		/* Address of memory block	*/
+	  int		c,		/* Byte value to use		*/
+	  int		n		/* Size of block in bytes 	*/
+	)
+{
+    register int i;
+    char *cp = (char *)s;
+
+    for (i = 0; i < n; i++)
+    {
+        *cp = (unsigned char)c;
+        cp++;
+    }
+    return s;
+}
diff --git a/lib/original/printf.c b/lib/original/printf.c
new file mode 100644
index 0000000..afdc081
--- /dev/null
+++ b/lib/original/printf.c
@@ -0,0 +1,28 @@
+/* printf.c - printf*/
+
+#include <xinu.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+extern void _fdoprnt(char *, va_list, int (*)(did32, char), int);
+extern int xinu_putc(did32, char);
+
+/*------------------------------------------------------------------------
+ *  printf  -  standard C printf function
+ *------------------------------------------------------------------------
+ */
+int	printf(
+	  const char		*fmt,
+	  ...
+	)
+{
+    va_list ap;
+    //syscall putc(did32, char);
+    int xinu_putc(did32, char);
+
+    va_start(ap, fmt);
+    _fdoprnt((char *)fmt, ap, putc, stdout);
+    va_end(ap);
+
+    return 0;
+}
diff --git a/lib/original/putchar.c b/lib/original/putchar.c
new file mode 100644
index 0000000..a1be5c0
--- /dev/null
+++ b/lib/original/putchar.c
@@ -0,0 +1,15 @@
+/* putchar.c - putchar */
+
+#include <xinu.h>
+#include <stdio.h>
+
+/*------------------------------------------------------------------------
+ *  putchar  -  C putchar function
+ *------------------------------------------------------------------------
+ */
+int	putchar(
+	  int		c
+	)
+{
+    return fputc(c, stdout);
+}
diff --git a/lib/original/qsort.c b/lib/original/qsort.c
new file mode 100644
index 0000000..f097cc5
--- /dev/null
+++ b/lib/original/qsort.c
@@ -0,0 +1,162 @@
+/* qsort.c - qsort, qs1, qsexc, qstexc */
+
+static int (*qscmp) (char *, char *);
+static int qses;
+static void qs1(char *, char *);
+static void qsexc(char *, char *);
+static void qstexc(char *, char *, char *);
+
+/*------------------------------------------------------------------------
+ *  qsort  -  Use quicksort to sort an array
+ *------------------------------------------------------------------------
+ */
+void	qsort(
+	  char		*a,		/* Array to sort		*/
+	  unsigned	n,		/* Length of the array		*/
+	  int		es,		/* Pivot value			*/
+	  int		(*fc)(char *, char *)	/* Comparison function	*/
+	)
+{
+    qscmp = fc;
+    qses = es;
+    qs1(a, a + n * es);
+}
+
+/*------------------------------------------------------------------------
+ *  qs1  -  internal quicksort function
+ *------------------------------------------------------------------------
+ */
+static void	qs1(
+		  char		*a,
+		  char		*l
+		)
+{
+    register char *i, *j;
+    register int es;
+    char *lp, *hp;
+    int c;
+    unsigned n;
+
+    es = qses;
+
+  start:
+    if ((n = l - a) <= es)
+    {
+        return;
+    }
+    n = es * (n / (2 * es));
+    hp = lp = a + n;
+    i = a;
+    j = l - es;
+    for (;;)
+    {
+        if (i < lp)
+        {
+            if ((c = (*qscmp) (i, lp)) == 0)
+            {
+                qsexc(i, lp -= es);
+                continue;
+            }
+            if (c < 0)
+            {
+                i += es;
+                continue;
+            }
+        }
+
+      loop:
+        if (j > hp)
+        {
+            if ((c = (*qscmp) (hp, j)) == 0)
+            {
+                qsexc(hp += es, j);
+                goto loop;
+            }
+            if (c > 0)
+            {
+                if (i == lp)
+                {
+                    qstexc(i, hp += es, j);
+                    i = lp += es;
+                    goto loop;
+                }
+                qsexc(i, j);
+                j -= es;
+                i += es;
+                continue;
+            }
+            j -= es;
+            goto loop;
+        }
+
+        if (i == lp)
+        {
+            if (lp - a >= l - hp)
+            {
+                qs1(hp + es, l);
+                l = lp;
+            }
+            else
+            {
+                qs1(a, lp);
+                a = hp + es;
+            }
+            goto start;
+        }
+
+        qstexc(j, lp -= es, i);
+        j = hp -= es;
+    }
+}
+
+/*------------------------------------------------------------------------
+ *  qsexc  -  internal quicksort function
+ *------------------------------------------------------------------------
+ */
+static void	qsexc(
+		  char		*i,
+		  char		*j
+		)
+{
+    register char *ri, *rj, c;
+    int n;
+
+    n = qses;
+    ri = i;
+    rj = j;
+    do
+    {
+        c = *ri;
+        *ri++ = *rj;
+        *rj++ = c;
+    }
+    while (--n);
+}
+
+/*------------------------------------------------------------------------
+ *  qstexc  -  internal quicksort function
+ *------------------------------------------------------------------------
+ */
+static void	qstexc(
+		  char		*i,
+		  char		*j,
+		  char		*k
+		)
+{
+    register char *ri, *rj, *rk;
+    int c;
+    int n;
+
+    n = qses;
+    ri = i;
+    rj = j;
+    rk = k;
+    do
+    {
+        c = *ri;
+        *ri++ = *rk;
+        *rk++ = *rj;
+        *rj++ = c;
+    }
+    while (--n);
+}
diff --git a/lib/original/rand.c b/lib/original/rand.c
new file mode 100644
index 0000000..a237c0b
--- /dev/null
+++ b/lib/original/rand.c
@@ -0,0 +1,38 @@
+/* rand.c - rand, rand_r, srand */
+
+#include <stdlib.h>
+
+static unsigned int rand_seed = 1;
+extern	int rand_r(unsigned int*);
+
+/*------------------------------------------------------------------------
+ *  rand  -  Calculates a uniform random number [0, RAND_MAX]
+ *------------------------------------------------------------------------
+ */
+int	rand()
+{
+    return rand_r(&rand_seed);
+}
+
+/*------------------------------------------------------------------------
+ *  rand_r  -  Calculates a uniform random number [0, RAND_MAX]
+ *------------------------------------------------------------------------
+ */
+int	rand_r(
+	  unsigned int*		seedp
+	)
+{
+	*seedp = 16807 * (*seedp) % (RAND_MAX + 1);
+	return (int)(*seedp);
+}
+
+/*------------------------------------------------------------------------
+ *  srand  -  Set the seed for rand
+ *------------------------------------------------------------------------
+ */
+void	srand(
+	  unsigned int		seed
+	)
+{
+    rand_seed = seed;
+}
diff --git a/lib/original/sprintf.c b/lib/original/sprintf.c
new file mode 100644
index 0000000..7b5abae
--- /dev/null
+++ b/lib/original/sprintf.c
@@ -0,0 +1,43 @@
+/* sprintf.c - sprintf */
+
+#include <stdarg.h>
+
+static int sprntf(int, int);
+extern void _fdoprnt(char *, va_list, int (*func) (int, int), int);
+
+/*------------------------------------------------------------------------
+ *  sprintf  -  Format arguments and place output in a string.
+ *------------------------------------------------------------------------
+ */
+int	sprintf(
+	  char		*str,		/* output string		*/
+	  char		*fmt,		/* format string		*/
+	  ...
+	)
+{
+    va_list ap;
+    char *s;
+
+    s = str;
+    va_start(ap, fmt);
+    _fdoprnt(fmt, ap, sprntf, (int)&s);
+    va_end(ap);
+    *s++ = '\0';
+
+    return ((int)str);
+}
+
+/*------------------------------------------------------------------------
+ *  sprntf  -  Routine called by _doprnt to handle each character.
+ *------------------------------------------------------------------------
+ */
+static int	sprntf(
+		  int		acpp,
+		  int		ac
+		)
+{
+    char **cpp = (char **)acpp;
+    char c = (char)ac;
+
+    return (*(*cpp)++ = c);
+}
diff --git a/lib/original/sscanf.c b/lib/original/sscanf.c
new file mode 100644
index 0000000..418baa3
--- /dev/null
+++ b/lib/original/sscanf.c
@@ -0,0 +1,50 @@
+/* sscanf.c - sscanf, sgetch, sungetch */
+
+#define EOF   (-2)
+
+static int sgetch(int, char **);
+static int sungetch(int, char **);
+extern int _doscan(register char *, register int **,
+                   int (*getc) (int, char **),
+                   int (*ungetc) (int, char **), int, int);
+
+/*------------------------------------------------------------------------
+ *  sscanf  -  Read from a string according to a format.
+ *			   Return result of _doscan.
+ *------------------------------------------------------------------------
+ */
+int	sscanf(
+	  char		*str,		/* String to read from		*/
+	  char		*fmt,		/* Format string		*/
+	  int		args		/* Num of args in format string	*/
+	)
+{
+    char *s;
+
+    s = str;
+    return (_doscan(fmt, (int **)&args, sgetch, sungetch, 0, (int)&s));
+}
+
+/*------------------------------------------------------------------------
+ *  sgetch  -  Get the next character from a string
+ *------------------------------------------------------------------------
+ */
+static int	sgetch(
+		  int		dummy,	/* Dummy unused variable	*/
+		  char		**cpp	/* String to use		*/
+		)
+{
+    return (*(*cpp) == '\0' ? EOF : *(*cpp)++);
+}
+
+/*------------------------------------------------------------------------
+ *  sungetch  -  Pushback a character in a string
+ *------------------------------------------------------------------------
+ */
+static int	sungetch(
+		  int		dummy,	/* Dummy unused variable	*/
+		  char		**cpp	/* String for pushback		*/
+		)
+{
+    return (*(*cpp)--);
+}
diff --git a/lib/original/strchr.c b/lib/original/strchr.c
new file mode 100644
index 0000000..98b0e25
--- /dev/null
+++ b/lib/original/strchr.c
@@ -0,0 +1,27 @@
+/* strchr.c - strchr */
+
+/*------------------------------------------------------------------------
+ *  strchr  -  Returns a pointer to the location in a string at which a
+ *			   character appears or NULL if char not found
+ *------------------------------------------------------------------------
+ */
+char	*strchr(
+	  const char	*s,		/* String to search		*/
+	  int		c		/* Character to locate		*/
+	)
+{
+    for (; *s != '\0'; s++)
+    {
+        if (*s == (const char)c)
+        {
+            return (char *)s;
+        }
+    }
+
+    if ((const char)c == *s)
+    {
+        return (char *)s;
+    }
+
+    return 0;
+}
diff --git a/lib/original/strcmp.c b/lib/original/strcmp.c
new file mode 100644
index 0000000..be9cc36
--- /dev/null
+++ b/lib/original/strcmp.c
@@ -0,0 +1,25 @@
+/* strcmp.c - strcmp */
+
+/*------------------------------------------------------------------------
+ * strcmp  -  Compare two strings, returning 0 of they are the same <0 if
+ *		first is lexically less and >0 if first is lexically >
+ *------------------------------------------------------------------------
+ */
+int	strcmp(
+	  char		*str1,
+	  char		*str2
+	)
+{
+	while (*str1 == *str2) {
+		if (*str1 == '\0') {
+	            return 0;
+        	}
+		str1++;
+		str2++;
+	}
+	if (*str1 < *str2) {
+		return -1;
+	} else {
+		return  1;
+	}
+}
diff --git a/lib/original/strcpy.c b/lib/original/strcpy.c
new file mode 100644
index 0000000..2b72f83
--- /dev/null
+++ b/lib/original/strcpy.c
@@ -0,0 +1,16 @@
+/* strcpy.c - strcpy */
+
+/*------------------------------------------------------------------------
+ * strcpy - Copy the string given by the second argument into the first
+ *------------------------------------------------------------------------
+ */
+int	strcpy(
+	  char		*tar,		/* target string		*/
+	  char		*src		/* source string		*/
+	)
+{
+	while ( (*tar++ = *src++) != '\0') {
+		;
+	}
+	return 0;
+}
diff --git a/lib/original/strlen.c b/lib/original/strlen.c
new file mode 100644
index 0000000..879ee7c
--- /dev/null
+++ b/lib/original/strlen.c
@@ -0,0 +1,20 @@
+/* strlen.c - strlen */
+
+/*------------------------------------------------------------------------
+ * strlen - Compute the length of a null-terminated character string, not
+ *			counting the null byte.
+ *------------------------------------------------------------------------
+ */
+int	strlen(
+	  char		*str		/* string to use		*/
+	)
+{
+	int	len;
+
+	len = 0;
+
+	while(*str++ != '\0') {
+		len++;
+	}
+	return  len;
+}
diff --git a/lib/original/strncat.c b/lib/original/strncat.c
new file mode 100644
index 0000000..2266690
--- /dev/null
+++ b/lib/original/strncat.c
@@ -0,0 +1,28 @@
+/* strncat.c - strncat */
+
+/*------------------------------------------------------------------------
+ *  strncat  -  Concatenate s2 onto the end of s1.  Sufficient space must
+ *			exist at the end of s1; ar most n characters are
+ *			copied
+ *------------------------------------------------------------------------
+ */
+char	*strncat(
+	  char		*s1,		/* first string			*/
+	  const char	*s2,		/* second string		*/
+	  int		n		/* length to concatenate	*/
+	)
+{
+    char *os1;
+
+    os1 = s1;
+    while (*s1++)
+        ;
+    --s1;
+    while ((*s1++ = *s2++))
+        if (--n < 0)
+        {
+            *--s1 = '\0';
+            break;
+        }
+    return (os1);
+}
diff --git a/lib/original/strncmp.c b/lib/original/strncmp.c
new file mode 100644
index 0000000..4ef426d
--- /dev/null
+++ b/lib/original/strncmp.c
@@ -0,0 +1,23 @@
+/* strncmp.c - strncmp */
+
+/*------------------------------------------------------------------------
+ *  strncmp  -  Compare at most n bytes of two strings, returning
+ *			>0 if s1>s2,  0 if s1=s2,  and <0 if s1<s2
+ *------------------------------------------------------------------------
+ */
+int	strncmp(
+	  char		*s1,		/* First memory location	*/
+	  char		*s2,		/* Second memory location	*/
+	  int		n		/* Length to compare		*/
+	)
+{
+
+    while (--n >= 0 && *s1 == *s2++)
+    {
+        if (*s1++ == '\0')
+        {
+            return 0;
+        }
+    }
+    return (n < 0 ? 0 : *s1 - *--s2);
+}
diff --git a/lib/original/strncpy.c b/lib/original/strncpy.c
new file mode 100644
index 0000000..84132a0
--- /dev/null
+++ b/lib/original/strncpy.c
@@ -0,0 +1,30 @@
+/* strncpy.c - strncpy */
+
+/*------------------------------------------------------------------------
+ *  strncpy  -  Copy string s2 to s1, truncating or null-padding so that
+ *			excatly n bytes are copied; return s1
+ *------------------------------------------------------------------------
+ */
+char	*strncpy(
+	  char		*s1,		/* First string			*/
+	  const char	*s2,		/* Second string		*/
+	  int		n		/* Length  to copy		*/
+			)
+{
+    register int i;
+    register char *os1;
+
+    os1 = s1;
+    for (i = 0; i < n; i++)
+    {
+        if (((*s1++) = (*s2++)) == '\0')
+        {
+            while (++i < n)
+            {
+                *s1++ = '\0';
+            }
+            return os1;
+        }
+    }
+    return os1;
+}
diff --git a/lib/original/strnlen.c b/lib/original/strnlen.c
new file mode 100644
index 0000000..1312767
--- /dev/null
+++ b/lib/original/strnlen.c
@@ -0,0 +1,20 @@
+/* strnlen.c - strnlen */
+
+/*------------------------------------------------------------------------
+ *  strnlen  -  Return the length of a string (number of non-NULL bytes),
+ *			up to the max specified by n
+ *------------------------------------------------------------------------
+ */
+int	strnlen(
+	  const char	*s,		/* string			*/
+	  unsigned int	len		/* max length			*/
+		)
+{
+    int n;
+
+    n = 0;
+    while (*s++ && n < len)
+        n++;
+
+    return (n);
+}
diff --git a/lib/original/strrchr.c b/lib/original/strrchr.c
new file mode 100644
index 0000000..4e9214c
--- /dev/null
+++ b/lib/original/strrchr.c
@@ -0,0 +1,30 @@
+/* strrchr.c - strrchr */
+
+/*------------------------------------------------------------------------
+ *  strrchr  -  Return a pointer to the location in a string at which a
+ *			particular character last appears or NULL if the
+ *			char is not found
+ *------------------------------------------------------------------------
+ */
+char	*strrchr(
+	  const char	*s,		/* String to search		*/
+	  int		c		/* Character to locate		*/
+	)
+{
+    char *r = 0;
+
+    for (; *s != '\0'; s++)
+    {
+        if (*s == (const char)c)
+        {
+            r = (char *)s;
+        }
+    }
+
+    if ((const char)c == *s)
+    {
+        return (char *)s;
+    }
+
+    return r;
+}
diff --git a/lib/original/strstr.c b/lib/original/strstr.c
new file mode 100644
index 0000000..cc5a417
--- /dev/null
+++ b/lib/original/strstr.c
@@ -0,0 +1,38 @@
+/* strstr.c - strstr */
+
+/*------------------------------------------------------------------------
+ *  strstr  -  Return a pointer to the location in a string at which a
+ *			substring appears or NULL if not found
+ *------------------------------------------------------------------------
+ */
+char	*strstr(
+	  const char	*cs,		/* String to search		*/
+	  const char	*ct		/* Substring to locate		*/
+	)
+{
+    char *cq;
+    char *cr;
+
+    for (; *cs != '\0'; cs++)
+    {
+        if (*cs == *ct)
+        {
+            cq = (char *)cs;
+            cr = (char *)ct;
+            while ((*cq != '\0') && (*cr != '\0'))
+            {
+                if (*cq != *cr)
+                {
+                    break;
+                }
+                cq++;
+                cr++;
+            }
+            if ('\0' == *cr)
+            {
+                return (char *)cs;
+            }
+        }
+    }
+    return 0;
+}
diff --git a/lib/userland.c b/lib/userland.c
new file mode 100644
index 0000000..7da006e
--- /dev/null
+++ b/lib/userland.c
@@ -0,0 +1,43 @@
+#include <xinu.h>
+
+__attribute__((naked))
+uint32 xinu_syscall(int nr, uint32 arg1, uint32 arg2, uint32 arg3) 
+{
+/*
+	asm volatile("push {r0-r11}");
+	asm volatile("push {lr}");
+	asm volatile("svc 1"); /* Hack: For all service call use 1, arg1 got number */
+/*
+	asm volatile("pop {lr}");
+	asm volatile("pop {r0-r11}");
+	asm volatile("bx lr");
+*/
+
+}	
+
+
+
+//void xinu_open(did32 descrp, char * name, char * mode) {
+//		
+//		xinu_syscall(XINU_OPEN, descrp, name, mode);			
+//}
+
+int xinu_uptime() {
+
+	return xinu_syscall(XINU_UPTIME, 0, 0, 0);
+}
+
+int xinu_putc(int dev, char c) {
+
+	return xinu_syscall(XINU_PUTC, dev, c, 0 );
+	//return xinu_syscall(XINU_PUTC, dev, c, 0);
+}
+
+
+//int xinu_close(dev);
+//int xinu_putc(dev);
+//
+//int xinu_yield();
+//int xinu_receive();
+//
+//int xinu_gettime();
diff --git a/lib/userland.c.orig b/lib/userland.c.orig
new file mode 100644
index 0000000..cc47c8a
--- /dev/null
+++ b/lib/userland.c.orig
@@ -0,0 +1,40 @@
+#include <xinu.h>
+
+__attribute__((naked))
+uint32 xinu_syscall(int nr, uint32 arg1, uint32 arg2, uint32 arg3) 
+{
+	asm volatile("push {r0-r11}");
+	asm volatile("push {lr}");
+	asm volatile("svc 1"); /* Hack: For all service call use 1, arg1 got number */
+	asm volatile("pop {lr}");
+	asm volatile("pop {r0-r11}");
+	asm volatile("bx lr");
+
+}	
+
+
+
+//void xinu_open(did32 descrp, char * name, char * mode) {
+//		
+//		xinu_syscall(XINU_OPEN, descrp, name, mode);			
+//}
+
+int xinu_uptime() {
+
+	return xinu_syscall(XINU_UPTIME, 0, 0, 0);
+}
+
+int xinu_putc(int dev, char c) {
+
+	return xinu_syscall(XINU_PUTC, dev, c, 0 );
+	//return xinu_syscall(XINU_PUTC, dev, c, 0);
+}
+
+
+//int xinu_close(dev);
+//int xinu_putc(dev);
+//
+//int xinu_yield();
+//int xinu_receive();
+//
+//int xinu_gettime();
diff --git a/screenshot.png b/screenshot.png
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HcmV?d00001

diff --git a/shell.orig/addargs.c b/shell.orig/addargs.c
new file mode 100644
index 0000000..ba3b7f1
--- /dev/null
+++ b/shell.orig/addargs.c
@@ -0,0 +1,93 @@
+/* addargs.c - addargs */
+
+#include <xinu.h>
+#include "shprototypes.h"
+
+/*------------------------------------------------------------------------
+ *  addargs  -  Add local copy of argv-style arguments to the stack of
+ *		  a command process that has been created by the shell
+ *------------------------------------------------------------------------
+ */
+status	addargs(
+	  pid32		pid,		/* ID of process to use		*/
+	  int32		ntok,		/* Count of arguments		*/
+	  int32		tok[],		/* Index of tokens in tokbuf	*/
+	  int32		tlen,		/* Length of data in tokbuf	*/
+	  char		*tokbuf,	/* Array of null-term. tokens	*/
+	  void 		*dummy		/* Dummy argument that was	*/
+					/*   used at creation and must	*/
+					/*   be replaced by a pointer	*/
+					/*   to an argument vector	*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	procent *prptr;		/* Ptr to process' table entry	*/
+	uint32	aloc;			/* Argument location in process	*/
+					/*   stack as an integer	*/
+	uint32	*argloc;		/* Location in process's stack	*/
+					/*   to place args vector	*/
+	char	*argstr;		/* Location in process's stack	*/
+					/*   to place arg strings	*/
+	uint32	*search;		/* pointer that searches for	*/
+					/*   dummy argument on stack	*/
+	uint32	*aptr;			/* Walks through args array	*/
+	int32	i;			/* Index into tok array		*/
+
+	mask = disable();
+
+	/* Check argument count and data length */
+
+	if ( (ntok <= 0) || (tlen < 0) ) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	prptr = &proctab[pid];
+
+	/* Compute lowest location in the process stack where the	*/
+	/*	args array will be stored followed by the argument	*/
+	/*	strings							*/
+	
+	aloc = (uint32) (prptr->prstkbase
+		- prptr->prstklen + sizeof(uint32));
+	argloc = (uint32*) ((aloc + 3) & ~0x3);	/* round multiple of 4	*/
+
+	/* Compute the first location beyond args array for the strings	*/
+
+	argstr = (char *) (argloc + (ntok+1));	/* +1 for a null ptr	*/
+
+	/* Set each location in the args vector to be the address of	*/
+	/*	string area plus the offset of this argument		*/
+
+	for (aptr=argloc, i=0; i < ntok; i++) {
+		*aptr++ = (uint32) (argstr + tok[i]);
+	}
+
+	/* Add a null pointer to the args array */
+
+	*aptr++ = (uint32)NULL;
+
+	/* Copy the argument strings from tokbuf into process's	stack	*/
+	/*	just beyond the args vector				*/
+
+	memcpy(aptr, tokbuf, tlen);
+
+	/* Find the second argument in process's stack */
+
+	for (search = (uint32 *)prptr->prstkptr;
+	     search < (uint32 *)prptr->prstkbase; search++) {
+
+		/* If found, replace with the address of the args vector*/
+
+		if (*search == (uint32)dummy) {
+			*search = (uint32)argloc;
+			restore(mask);
+			return OK;
+		}
+	}
+
+	/* Argument value not found on the stack - report an error */
+
+	restore(mask);
+	return SYSERR;
+}
diff --git a/shell.orig/lexan.c b/shell.orig/lexan.c
new file mode 100644
index 0000000..4e0cb8b
--- /dev/null
+++ b/shell.orig/lexan.c
@@ -0,0 +1,148 @@
+/* lexan.c  - lexan */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * lexan  -  Ad hoc lexical analyzer to divide command line into tokens
+ *------------------------------------------------------------------------
+ */
+
+int32	lexan (
+	  char		*line,		/* Input line terminated with	*/
+					/*   NEWLINE or NULLCH		*/
+	  int32		len,		/* Length of the input line,	*/
+					/*   including NEWLINE		*/
+	  char		*tokbuf,	/* Buffer into which tokens are	*/
+					/*   stored with a null		*/
+					/*   following each token	*/
+	  int32		*tlen,		/* Place to store number of	*/
+					/*   chars in tokbuf		*/
+	  int32		tok[],		/* Array of pointers to the	*/
+					/*   start of each token	*/
+	  int32		toktyp[]	/* Array that gives the type	*/
+					/*   of each token		*/
+	)
+{
+	char	quote;			/* Character for quoted string  */
+	uint32	ntok;			/* Number of tokens found	*/
+	char	*p;			/* Pointer that walks along the	*/
+					/*   input line			*/
+	int32	tbindex;		/* Index into tokbuf		*/
+	char	ch;			/* Next char from input line	*/
+
+	/* Start at the beginning of the line with no tokens */
+
+	ntok = 0;
+	p = line;
+	tbindex = 0;
+
+	/* While not yet at end of line, get next token */
+
+	while ( (*p != NULLCH) && (*p != SH_NEWLINE) ) {
+
+		/* If too many tokens, return error */
+
+		if (ntok >= SHELL_MAXTOK) {
+			return SYSERR;
+		}
+
+		/* Skip whitespace before token */
+
+		while ( (*p == SH_BLANK) || (*p == SH_TAB) ) {
+			p++;
+		}
+
+		/* Stop parsing at end of line (or end of string) */
+
+		ch = *p;
+		if ( (ch==SH_NEWLINE) || (ch==NULLCH) ) {
+			*tlen = tbindex;
+			return ntok;
+		}
+
+		/* Set next entry in tok array to be an index to the	*/
+		/*   current location in the token buffer		*/
+
+		tok[ntok] = tbindex;	/* the start of the token	*/
+
+		/* Set the token type */
+
+		switch (ch) {
+
+		    case SH_AMPER:	toktyp[ntok] = SH_TOK_AMPER;
+					tokbuf[tbindex++] = ch;
+					tokbuf[tbindex++] = NULLCH;
+					ntok++;
+					p++;
+					continue;
+
+		    case SH_LESS:	toktyp[ntok] = SH_TOK_LESS;
+					tokbuf[tbindex++] = ch;
+					tokbuf[tbindex++] = NULLCH;
+					ntok++;
+					p++;
+					continue;
+
+		    case SH_GREATER:	toktyp[ntok] = SH_TOK_GREATER;
+					tokbuf[tbindex++] = ch;
+					tokbuf[tbindex++] = NULLCH;
+					ntok++;
+					p++;
+					continue;
+
+		    default:		toktyp[ntok] = SH_TOK_OTHER;
+		};
+
+		/* Handle quoted string (single or double quote) */
+
+		if ( (ch==SH_SQUOTE) || (ch==SH_DQUOTE) ) {
+			quote = ch;	/* remember opening quote */
+
+			/* Copy quoted string to arg area */
+
+			p++;	/* Move past starting quote */
+
+			while ( ((ch=*p++) != quote) && (ch != SH_NEWLINE)
+					&& (ch != NULLCH) ) {
+				tokbuf[tbindex++] = ch;
+			}
+			if (ch != quote) {  /* string missing end quote	*/
+				return SYSERR;
+			}
+
+			/* Finished string - count token and go on	*/
+
+			tokbuf[tbindex++] = NULLCH; /* terminate token	*/
+			ntok++;		/* count string as one token	*/
+			continue;	/* go to next token		*/
+		}
+
+		/* Handle a token other than a quoted string		*/
+
+		tokbuf[tbindex++] = ch;	/* put first character in buffer*/
+		p++;
+
+		while ( ((ch = *p) != SH_NEWLINE) && (ch != NULLCH)
+			&& (ch != SH_LESS)  && (ch != SH_GREATER)
+			&& (ch != SH_BLANK) && (ch != SH_TAB)
+			&& (ch != SH_AMPER) && (ch != SH_SQUOTE)
+			&& (ch != SH_DQUOTE) )	{
+				tokbuf[tbindex++] = ch;
+				p++;
+		}
+
+		/* Report error if other token is appended */
+
+		if (       (ch == SH_SQUOTE) || (ch == SH_DQUOTE)
+			|| (ch == SH_LESS)   || (ch == SH_GREATER) ) {
+			return SYSERR;
+		}
+
+		tokbuf[tbindex++] = NULLCH;	/* terminate the token	*/
+
+                ntok++;				/* count valid token	*/
+
+	}
+	*tlen = tbindex;
+	return ntok;
+}
diff --git a/shell.orig/shell.c b/shell.orig/shell.c
new file mode 100644
index 0000000..c04620b
--- /dev/null
+++ b/shell.orig/shell.c
@@ -0,0 +1,303 @@
+/* shell.c  -  shell */
+
+#include <xinu.h>
+//#include <stdio.h>
+#include "shprototypes.h"
+
+/************************************************************************/
+/* Table of Xinu shell commands and the function associated with each	*/
+/************************************************************************/
+const	struct	cmdent	cmdtab[] = {
+	{"argecho",	TRUE,	xsh_argecho},
+	{"cat",		FALSE,	xsh_cat},
+	{"clear",	TRUE,	xsh_clear},
+	{"date",	FALSE,	xsh_date},
+	{"devdump",	FALSE,	xsh_devdump},
+	{"echo",	FALSE,	xsh_echo},
+	{"exit",	TRUE,	xsh_exit},
+	{"help",	FALSE,	xsh_help},
+	{"kill",	TRUE,	xsh_kill},
+	{"memdump",	FALSE,	xsh_memdump},
+	{"memstat",	TRUE,	xsh_memstat}, /* Make built-in */
+	{"ps",		FALSE,	xsh_ps},
+	{"sleep",	FALSE,	xsh_sleep},
+	{"uptime",	FALSE,	xsh_uptime},
+	{"?",		FALSE,	xsh_help}
+
+};
+
+uint32	ncmd = sizeof(cmdtab) / sizeof(struct cmdent);
+
+/************************************************************************/
+/* shell  -  Provide an interactive user interface that executes	*/
+/*	     commands.  Each command begins with a command name, has	*/
+/*	     a set of optional arguments, has optional input or		*/
+/*	     output redirection, and an optional specification for	*/
+/*	     background execution (ampersand).  The syntax is:		*/
+/*									*/
+/*		   command_name [args*] [redirection] [&]		*/
+/*									*/
+/*	     Redirection is either or both of:				*/
+/*									*/
+/*				< input_file				*/
+/*			or						*/
+/*				> output_file				*/
+/*									*/
+/************************************************************************/
+
+process	shell (
+		did32	dev		/* ID of tty device from which	*/
+	)				/*   to accept commands		*/
+{
+	char	buf[SHELL_BUFLEN];	/* Input line (large enough for	*/
+	int32	len;			/* Length of line read		*/
+	char	tokbuf[SHELL_BUFLEN +	/* Buffer to hold a set of	*/
+			SHELL_MAXTOK];  /* Contiguous null-terminated	*/
+	int32	tlen;			/* Current length of all data	*/
+					/*   in array tokbuf		*/
+	int32	tok[SHELL_MAXTOK];	/* Index of each token in	*/
+	int32	toktyp[SHELL_MAXTOK];	/* Type of each token in tokbuf	*/
+	int32	ntok;			/* Number of tokens on line	*/
+	pid32	child;			/* Process ID of spawned child	*/
+	bool8	backgnd;		/* Run command in background?	*/
+	char	*outname, *inname;	/* Pointers to strings for file	*/
+					/*   names that follow > and <	*/
+	did32	stdinput, stdoutput;	/* Descriptors for redirected	*/
+					/*   input and output		*/
+	int32	i;			/* Index into array of tokens	*/
+	int32	j;			/* Index into array of commands	*/
+	int32	msg;			/* Message from receive() for	*/
+					/*   child termination		*/
+	int32	tmparg;			/* Address of this var is used	*/
+					/*   when first creating child	*/
+					/*   process, but is replaced	*/
+	char	*src, *cmp;		/* Pointers used during name	*/
+					/*   comparison			*/
+	bool8	diff;			/* Was difference found during	*/
+	char	*args[SHELL_MAXTOK];	/* Argument vector passed to	*/
+					/*   builtin commands		*/
+
+	/* Print shell banner and startup message */
+
+	fprintf(dev, "\n\n%s%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
+		SHELL_BAN0,SHELL_BAN1,SHELL_BAN2,SHELL_BAN3,SHELL_BAN4,
+		SHELL_BAN5,SHELL_BAN6,SHELL_BAN7,SHELL_BAN8,SHELL_BAN9,SHELL_BAN10);
+
+	fprintf(dev, "%s\n\n", SHELL_STRTMSG);
+
+	/* Continually prompt the user, read input, and execute command	*/
+
+	
+	while (TRUE) {
+
+		/* Display prompt */
+		fprintf(dev, SHELL_PROMPT);
+
+
+		len = read(dev, buf, sizeof(buf));
+
+		/* Exit gracefully on end-of-file */
+
+		if (len == EOF) {
+			break;
+		}
+
+		/* If line contains only NEWLINE, go to next line */
+
+		if (len <= 1) {
+			continue;
+		}
+
+		buf[len] = SH_NEWLINE;	/* terminate line */
+
+		/* Parse input line and divide into tokens */
+
+		ntok = lexan(buf, len, tokbuf, &tlen, tok, toktyp);
+
+		/* Handle parsing error */
+
+		if (ntok == SYSERR) {
+			fprintf(dev,"%s\n", SHELL_SYNERRMSG);
+			continue;
+		}
+
+		/* If line is empty, go to next input line */
+
+		if (ntok == 0) {
+			fprintf(dev, "\n");
+			continue;
+		}
+
+		/* If last token is '&', set background */
+
+		if (toktyp[ntok-1] == SH_TOK_AMPER) {
+			ntok-- ;
+			tlen-= 2;
+			backgnd = TRUE;
+		} else {
+			backgnd = FALSE;
+		}
+
+
+		/* Check for input/output redirection (default is none) */
+
+		outname = inname = NULL;
+		if ( (ntok >=3) && ( (toktyp[ntok-2] == SH_TOK_LESS)
+				   ||(toktyp[ntok-2] == SH_TOK_GREATER))){
+			if (toktyp[ntok-1] != SH_TOK_OTHER) {
+				fprintf(dev,"%s\n", SHELL_SYNERRMSG);
+				continue;
+			}
+			if (toktyp[ntok-2] == SH_TOK_LESS) {
+				inname =  &tokbuf[tok[ntok-1]];
+			} else {
+				outname = &tokbuf[tok[ntok-1]];
+			}
+			ntok -= 2;
+			tlen = tok[ntok];
+		}
+
+
+		if ( (ntok >=3) && ( (toktyp[ntok-2] == SH_TOK_LESS)
+				   ||(toktyp[ntok-2] == SH_TOK_GREATER))){
+			if (toktyp[ntok-1] != SH_TOK_OTHER) {
+				fprintf(dev,"%s\n", SHELL_SYNERRMSG);
+				continue;
+			}
+			if (toktyp[ntok-2] == SH_TOK_LESS) {
+				if (inname != NULL) {
+				    fprintf(dev,"%s\n", SHELL_SYNERRMSG);
+				    continue;
+				}
+				inname = &tokbuf[tok[ntok-1]];
+			} else {
+				if (outname != NULL) {
+				    fprintf(dev,"%s\n", SHELL_SYNERRMSG);
+				    continue;
+				}
+				outname = &tokbuf[tok[ntok-1]];
+			}
+			ntok -= 2;
+			tlen = tok[ntok];
+		}
+
+		/* Verify remaining tokens are type "other" */
+
+		for (i=0; i<ntok; i++) {
+			if (toktyp[i] != SH_TOK_OTHER) {
+				break;
+			}
+		}
+		if ((ntok == 0) || (i < ntok)) {
+			fprintf(dev, SHELL_SYNERRMSG);
+			continue;
+		}
+
+		stdinput = stdoutput = dev;
+
+		/* Lookup first token in the command table */
+
+		for (j = 0; j < ncmd; j++) {
+			src = cmdtab[j].cname;
+			cmp = tokbuf;
+			diff = FALSE;
+			while (*src != NULLCH) {
+				if (*cmp != *src) {
+					diff = TRUE;
+					break;
+				}
+				src++;
+				cmp++;
+			}
+			if (diff || (*cmp != NULLCH)) {
+				continue;
+			} else {
+				break;
+			}
+		}
+
+		/* Handle command not found */
+
+		if (j >= ncmd) {
+			fprintf(dev, "command %s not found\n", tokbuf);
+			continue;
+		}
+
+		/* Handle built-in command */
+
+		if (cmdtab[j].cbuiltin) { /* No background or redirect. */
+			if (inname != NULL || outname != NULL || backgnd){
+				fprintf(dev, SHELL_BGERRMSG);
+				continue;
+			} else {
+				/* Set up arg vector for call */
+
+				for (i=0; i<ntok; i++) {
+					args[i] = &tokbuf[tok[i]];
+				}
+
+				/* Call builtin shell function */
+
+				if ((*cmdtab[j].cfunc)(ntok, args)
+							== SHELL_EXIT) {
+					break;
+				}
+			}
+			continue;
+		}
+
+		/* Open files and redirect I/O if specified */
+
+		if (inname != NULL) {
+			stdinput = open(NAMESPACE,inname,"ro");
+			if (stdinput == SYSERR) {
+				fprintf(dev, SHELL_INERRMSG, inname);
+				continue;
+			}
+		}
+		if (outname != NULL) {
+			stdoutput = open(NAMESPACE,outname,"w");
+			if (stdoutput == SYSERR) {
+				fprintf(dev, SHELL_OUTERRMSG, outname);
+				continue;
+			} else {
+				control(stdoutput, F_CTL_TRUNC, 0, 0);
+			}
+		}
+
+		/* Spawn child thread for non-built-in commands */
+
+		child = create(cmdtab[j].cfunc,
+			SHELL_CMDSTK, SHELL_CMDPRIO,
+			cmdtab[j].cname, 2, ntok, &tmparg);
+
+		/* If creation or argument copy fails, report error */
+
+		if ((child == SYSERR) ||
+		    (addargs(child, ntok, tok, tlen, tokbuf, &tmparg)
+							== SYSERR) ) {
+			fprintf(dev, SHELL_CREATMSG);
+			continue;
+		}
+
+		/* Set stdinput and stdoutput in child to redirect I/O */
+
+		proctab[child].prdesc[0] = stdinput;
+		proctab[child].prdesc[1] = stdoutput;
+
+		msg = recvclr();
+		resume(child);
+		
+		if (! backgnd) {
+			msg = receive();
+			while (msg != child) {
+				msg = receive();
+			}
+		}
+    }
+
+    /* Terminate the shell process by returning from the top level */
+
+    fprintf(dev,SHELL_EXITMSG);
+    return OK;
+}
diff --git a/shell.orig/xsh_argecho.c b/shell.orig/xsh_argecho.c
new file mode 100644
index 0000000..649391d
--- /dev/null
+++ b/shell.orig/xsh_argecho.c
@@ -0,0 +1,21 @@
+/* xsh_argecho.c - xsh_argecho */
+
+#include <xinu.h>
+#include <stdio.h>
+
+/*------------------------------------------------------------------------
+ * xhs_argecho - display argecho message that lists shell commands
+ *------------------------------------------------------------------------
+ */
+shellcmd xsh_argecho(int nargs, char *args[])
+{
+	int32	i;
+
+	printf("\n\nThe %d arguments are:\n", nargs);
+	for (i = 0; i < nargs; i++) {
+		printf("    %2d: %s\n", i, args[i]);
+	}
+	printf("\n");
+
+	return 0;
+}
diff --git a/shell.orig/xsh_cat.c b/shell.orig/xsh_cat.c
new file mode 100644
index 0000000..13b3af1
--- /dev/null
+++ b/shell.orig/xsh_cat.c
@@ -0,0 +1,59 @@
+/* xsh_cat.c - xsh_cat */
+
+#include <xinu.h>
+#include <stdio.h>
+#include <string.h>
+
+/*------------------------------------------------------------------------
+ * xsh_cat - shell command to cat one or more files
+ *------------------------------------------------------------------------
+ */
+shellcmd xsh_cat(int nargs, char *args[])
+{
+	int32	i;			/* index into proctabl		*/
+	int32	nextch;			/* character read from file	*/
+	did32	descr;			/* descriptor for a file	*/
+	char	*argptr;		/* pointer to next arg string	*/
+
+
+	/* For argument '--help', emit help about the 'cat' command	*/
+
+	if (nargs == 2 && strncmp(args[1], "--help", 7) == 0) {
+		printf("Use: %s [file...]\n\n", args[0]);
+		printf("Description:\n");
+		printf("\twrites contents of files or stdin to stdout\n");
+		printf("Options:\n");
+		printf("\tfile...\tzero or more file names\n");
+		printf("\t--help\t display this help and exit\n");
+		return 0;
+	}
+
+	if (nargs == 1) {
+		nextch = getc(stdin);
+		while (nextch != EOF) {
+			putc(stdout, nextch);
+			nextch = getc(stdin);
+		}
+		return 0;
+	}
+	for (i = 1; i < nargs; i++) {
+		argptr = args[i];
+		if ( (argptr[0] == '-') && (argptr[1] == NULLCH) ) {
+			descr = stdin;
+		} else {
+			descr = open(NAMESPACE, argptr, "ro");
+			if (descr == (did32)SYSERR) {
+				fprintf(stderr, "%s: cannot open file %s\n",
+					args[0], argptr);
+				return 1;
+			}
+		}
+		nextch = getc(descr);
+		while (nextch != EOF) {
+			putc(stdout, nextch);
+			nextch = getc(descr);
+		}
+		close(descr);
+	}
+	return 0;
+}
diff --git a/shell.orig/xsh_clear.c b/shell.orig/xsh_clear.c
new file mode 100644
index 0000000..a9442da
--- /dev/null
+++ b/shell.orig/xsh_clear.c
@@ -0,0 +1,22 @@
+/* xsh_clear.c - xsh_clear */
+
+#include <xinu.h>
+#include <stdio.h>
+
+/*------------------------------------------------------------------------
+ * xsh_clear - clear the display window (assumes xterm / VT100)
+ *------------------------------------------------------------------------
+ */
+shellcmd xsh_clear(int nargs, char *args[])
+{
+
+    /* Insure no arguments were passed */
+
+    if (nargs > 1) {
+	fprintf(stderr,"use is: %s\n", args[0]);
+	return 1;
+    }
+
+    printf("\033[0m\033[2J\033[H\n");
+    return 0;
+}
diff --git a/shell.orig/xsh_date.c b/shell.orig/xsh_date.c
new file mode 100644
index 0000000..2f27822
--- /dev/null
+++ b/shell.orig/xsh_date.c
@@ -0,0 +1,69 @@
+/* xsh_date.c - xsh_date */
+
+#include <xinu.h>
+#include <string.h>
+#include <stdio.h>
+
+/*------------------------------------------------------------------------
+ * xsh_date - obtain and print the current month, day, year, and time
+ *------------------------------------------------------------------------
+ */
+shellcmd xsh_date(int nargs, char *args[]) {
+
+	int32	retval;			/* return value			*/
+	uint32	now;			/* current local time		*/
+	char	datestr[64];		/* printable date in ascii	*/
+
+	/* Output info for '--help' argument */
+
+	if (nargs == 2 && strncmp(args[1], "--help", 7) == 0) {
+		printf("Usage: %s\n\n", args[0]);
+		printf("Description:\n");
+		printf("\tDisplays the current date and time\n");
+		printf("Options (one per invocation):\n");
+		printf("\t-f\tforce a time server request to be sent\n");
+		printf("\t-d\tset daylight savings time on\n");
+		printf("\t-s\tset standard time (not daylight savings)\n");
+		printf("\t-a\tset daylight savings to automatic\n");
+		printf("\t--help\tdisplay this help and exit\n");
+		return 0;
+	}
+
+	/* Check argument count */
+
+	if (nargs > 2) {
+		fprintf(stderr, "%s: too many arguments\n", args[0]);
+		fprintf(stderr, "Try '%s --help' for more information\n",
+			args[0]);
+		return 1;
+	}
+
+	if (nargs == 2) {
+		if (strncmp(args[1], "-f", 3) == 0) {
+			Date.dt_bootvalid = FALSE;
+		} else if (strncmp(args[1], "-d", 3) == 0) {
+			Date.dt_daylight = DATE_DST_ON;
+		} else if (strncmp(args[1], "-s", 3) == 0) {
+			Date.dt_daylight = DATE_DST_OFF;
+		} else if (strncmp(args[1], "-a", 3) == 0) {
+			Date.dt_daylight = DATE_DST_AUTO;
+		} else {
+			fprintf(stderr, "%s: invalid argument\n", args[0]);
+			fprintf(stderr,
+				"Try '%s --help' for more information\n",
+				args[0]);
+			return 1;
+		}
+	}
+
+	retval = gettime(&now);
+	if (retval == SYSERR) {
+		fprintf(stderr,
+			"%s: could not obtain the current date\n",
+			args[0]);
+		return 1;
+	}
+	ascdate(now, datestr);
+	printf("%s\n", datestr);
+	return 0;
+}
diff --git a/shell.orig/xsh_devdump.c b/shell.orig/xsh_devdump.c
new file mode 100644
index 0000000..1e41454
--- /dev/null
+++ b/shell.orig/xsh_devdump.c
@@ -0,0 +1,36 @@
+/* xsh_devdump.c  - xsh_devdump */
+
+#include <xinu.h>
+#include <stdio.h>
+
+/*------------------------------------------------------------------------
+ * xsh_devdump - shell command to print info from the device switch table
+ *------------------------------------------------------------------------
+ */
+shellcmd xsh_devdump (
+	 int	nargs,			/* number of arguments		*/
+	 char	*args[]			/* list of arguments		*/
+ 	)
+{
+	struct	dentry	*devptr;	/* pointer to device entry	*/
+	int32	i;			/* walks through device table	*/
+
+	/* No arguments are expected */
+
+	if (nargs > 1) {
+		fprintf(stderr, "No arguments allowed\n");
+		return 1;
+	}
+
+	/* Walk through device table */
+
+	printf("Device     Name     Minor\n");
+	printf("------ ------------ -----\n");
+
+	for (i = 0; i < NDEVS; i++) {
+		devptr = &devtab[i];
+		printf("%4d   %-12s %3d\n", i, devptr->dvname,
+			devptr->dvminor);
+	}
+	return 0;
+}
diff --git a/shell.orig/xsh_echo.c b/shell.orig/xsh_echo.c
new file mode 100644
index 0000000..393c81a
--- /dev/null
+++ b/shell.orig/xsh_echo.c
@@ -0,0 +1,24 @@
+/* xsh_echo.c - xsh_echo */
+
+#include <xinu.h>
+#include <stdio.h>
+
+/*------------------------------------------------------------------------
+ * xhs_echo - write argument strings to stdout
+ *------------------------------------------------------------------------
+ */
+shellcmd xsh_echo(int nargs, char *args[])
+{
+	int32	i;			/* walks through args array	*/
+
+	if (nargs > 1) {
+		printf("%s", args[1]);
+
+		for (i = 2; i < nargs; i++) {
+			printf(" %s", args[i]);
+		}
+	}
+	printf("\n");
+
+	return 0;
+}
diff --git a/shell.orig/xsh_exit.c b/shell.orig/xsh_exit.c
new file mode 100644
index 0000000..a4a77cd
--- /dev/null
+++ b/shell.orig/xsh_exit.c
@@ -0,0 +1,13 @@
+/* xsh_exit.c - xshexit */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * xsh_exit  -  shell command returns the exit code causing shell exit
+ *------------------------------------------------------------------------
+ */
+
+shellcmd xsh_exit(int nargs, char *args[])
+{
+	return SHELL_EXIT;
+}
diff --git a/shell.orig/xsh_help.c b/shell.orig/xsh_help.c
new file mode 100644
index 0000000..0ebfece
--- /dev/null
+++ b/shell.orig/xsh_help.c
@@ -0,0 +1,124 @@
+/* xsh_help.c - xsh_help */
+
+#include <xinu.h>
+#include <stdio.h>
+#include <string.h>
+
+/*------------------------------------------------------------------------
+ * xhs_help - display help message that lists shell commands
+ *------------------------------------------------------------------------
+ */
+shellcmd xsh_help(int nargs, char *args[])
+{
+	int32	i;
+	char	*argv[2];		/* argument vector for call	*/
+	char	*src, *cmp;		/* used for string compare	*/
+	int32	len;			/* length of a command name	*/
+	int32	maxlen;			/* maximum length of all	*/
+					/*   command names		*/
+	int32	cols;			/* number of columns in the	*/
+					/*   formatted command list	*/
+	int32	spac;			/* space per column in the	*/
+					/*   formatted command list	*/
+	int32	lines;			/* total lines of output in the	*/
+					/*   formatted command list	*/
+	int32	j;			/* index of commands across one	*/
+					/*   line of formatted output	*/
+	
+	/* For argument '--help', emit help about the 'help' command	*/
+
+	if (nargs == 2 && strncmp(args[1], "--help", 7) == 0) {
+
+		printf("Use:\n");
+		printf("\t%s [command]\n", args[0]);
+		printf("Description:\n");
+		printf("\tProvides a list of shell commands or\n");
+		printf("\thelp information for a specific command\n");
+		printf("Options:\n");
+		printf("\tcommand\tspecific command for which to\n");
+		printf("\t\tdisplay help information\n");
+		printf("\t--help\tdisplay this help and exit\n");
+		return 0;
+	}
+
+	/* Check for valid number of arguments */
+
+	if (nargs > 2) {
+		fprintf(stderr, "%s: too many arguments\n", args[0]);
+		fprintf(stderr, "Try '%s --help' for more information\n",
+				args[0]);
+		return 1;
+	}
+
+	/* Output help for specific command given as an argument */
+
+	if (nargs == 2) {
+		for (i = 0; i < ncmd; i++) {
+			src = cmdtab[i].cname;
+			cmp = args[1];
+			while (*src != NULLCH) {
+				if (*src != *cmp) {
+					break;
+				}
+				src++;
+				cmp++;
+			}
+			if ( (*src != NULLCH) || (*cmp != NULLCH) ) {
+				continue;
+			}
+
+			/* prepare args for shell command */
+
+			argv[0] = args[1];
+			argv[1] = "--help";
+			(*cmdtab[i].cfunc) (2, argv);
+			return 0;
+		}
+		printf("%s: no such command as '%s'\n", args[0], args[1]);
+		return 1;
+	}
+
+	/* No arguments -- print a list of shell commands */
+
+	printf("\nshell commands are:\n\n");
+
+	/* Calculate the maximum length of a command name */
+
+	maxlen = 0;
+	for (i = 0; i < ncmd; i++) {
+		len = strnlen(cmdtab[i].cname, 80);
+		if (len > maxlen) {
+			maxlen = len;
+		}
+	}
+
+	/* Calculate the number of command names per line */
+
+	cols = 80/(maxlen+1);
+	if (cols > 6) {
+		cols = 6;
+	}
+
+	/* Calculate the width of a column */
+
+	spac = 80/cols;
+
+	/* Calculate the number of lines of output */
+
+	lines = (ncmd+(cols-1))/cols;
+
+	/* print the lines of command names */
+
+	for (i=0; i<lines; i++) {
+		for (j=i; j<ncmd; j+=lines) {
+			len = strnlen(cmdtab[j].cname,80);
+			printf("%s", cmdtab[j].cname);
+			while (len < spac) {
+				printf(" ");
+				len++;
+			}
+		}
+		printf("\n");
+	}
+	return 0;
+}
diff --git a/shell.orig/xsh_kill.c b/shell.orig/xsh_kill.c
new file mode 100644
index 0000000..1c903e9
--- /dev/null
+++ b/shell.orig/xsh_kill.c
@@ -0,0 +1,66 @@
+/* xsh_kill.c - xsh_kill */
+
+#include <xinu.h>
+#include <string.h>
+#include <stdio.h>
+
+/*------------------------------------------------------------------------
+ * xsh_kill - obtain and print the current month, day, year, and time
+ *------------------------------------------------------------------------
+ */
+shellcmd xsh_kill(int nargs, char *args[]) {
+
+	int32	retval;			/* return value			*/
+	pid32	pid;			/* ID of process to kill	*/
+	char	ch;			/* next character of argument	*/
+	char	*chptr;			/* walks along argument string	*/
+
+	/* Output info for '--help' argument */
+
+	if (nargs == 2 && strncmp(args[1], "--help", 7) == 0) {
+		printf("Usage: %s PID\n\n", args[0]);
+		printf("Description:\n");
+		printf("\tterminates a process\n");
+		printf("Options:\n");
+		printf("\tPID \tthe ID of a process to terminate\n");
+		printf("\t--help\tdisplay this help and exit\n");
+		return OK;
+	}
+
+	/* Check argument count */
+
+	if (nargs != 2) {
+		fprintf(stderr, "%s: incorrect argument\n", args[0]);
+		fprintf(stderr, "Try '%s --help' for more information\n",
+			args[0]);
+		return SYSERR;
+	}
+
+	/* compute process ID from argument string */
+
+	chptr = args[1];
+	ch = *chptr++;
+	pid = 0;
+	while(ch != NULLCH) {
+		if ( (ch < '0') || (ch > '9') ) {
+			fprintf(stderr, "%s: non-digit in process ID\n",
+				args[0]);
+			return 1;
+		}
+		pid = 10*pid + (ch - '0');
+		ch = *chptr++;
+	}
+	if (pid == 0) {
+		fprintf(stderr, "%s: cannot kill the null process\n",
+			args[0]);
+		return 1;
+	}
+
+	retval = kill(pid);
+	if (retval == SYSERR) {
+		fprintf(stderr, "%s: cannot kill process %d\n",
+			args[0], pid);
+		return 1;
+	}
+	return 0;
+}
diff --git a/shell.orig/xsh_memdump.c b/shell.orig/xsh_memdump.c
new file mode 100644
index 0000000..96a0787
--- /dev/null
+++ b/shell.orig/xsh_memdump.c
@@ -0,0 +1,165 @@
+/* xsh_memdump.c - xsh_memdump */
+
+#include <xinu.h>
+#include <string.h>
+#include <stdio.h>
+
+static	uint32	parseval(char *);
+extern	uint32	start;
+
+/*------------------------------------------------------------------------
+ * xsh_memdump - dump a region of memory by displaying values in hex
+ *			 and ascii
+ *------------------------------------------------------------------------
+ */
+shellcmd xsh_memdump(int nargs, char *args[])
+{
+	bool8	force = FALSE;		/* ignore address sanity checks	*/
+	uint32	begin;			/* begining address		*/
+	uint32	stop;			/* last address to dump		*/
+	uint32	length;			/* length of region to dump	*/
+	int32	arg;			/* index into args array	*/
+	uint32	l;			/* counts length during dump	*/
+	int32	i;			/* counts words during dump	*/
+	uint32	*addr;			/* address to dump		*/
+	char	*chptr;			/* character address to dump	*/
+	char	ch;			/* next character to print	*/
+
+	/* For argument '--help', emit help about the 'memdump' command	*/
+
+	if (nargs == 2 && strncmp(args[1], "--help", 7) == 0) {
+		printf("Use: %s [-f] Address Length\n\n", args[0]);
+		printf("Description:\n");
+		printf("\tDumps Length bytes of memory begining at the\n");
+		printf("\tspecified starting address (both the address\n");
+		printf("\tand length can be specified in decimal or hex)\n");
+		printf("Options:\n");
+		printf("\t-f         ignore sanity checks for addresses\n");
+		printf("\tAddress    memory address at which to start\n");
+		printf("\tLength     the number of bytes to dump\n");
+		printf("\t--help     display this help and exit\n");
+		return 0;
+	}
+
+	/* Check for valid number of arguments */
+
+	if (nargs < 3 || nargs > 4) {
+		fprintf(stderr, "%s: incorrect number of arguments\n",
+				args[0]);
+		fprintf(stderr, "Try '%s --help' for more information\n",
+				args[0]);
+		return 1;
+	}
+
+	arg = 1;
+	if (strncmp(args[arg], "-f", 2) == 0) {
+		force = TRUE;
+		arg++;
+		nargs --;
+	}
+
+	if (nargs != 3) {
+		fprintf(stderr, "%s: too few arguments\n", args[0]);
+		fprintf(stderr, "Try '%s --help' for more information\n",
+				args[0]);
+		return 1;
+	}
+
+	if ( (begin=parseval(args[arg])) == 0 ) {
+		fprintf(stderr, "%s: invalid begining address\n",
+				args[0]);
+		return 1;
+	}
+	if ( (length =parseval(args[arg+1])) == 0 ) {
+		fprintf(stderr, "%s: invalid length address\n",
+				args[0]);
+		return 1;
+	}
+
+	/* Round begining address down to multiple of four and round	*/
+	/*	length up to a multiple of four				*/
+
+	begin &= ~0x3;
+	length = (length + 3) & ~0x3;
+
+	/* Add length to begin address */
+
+	stop = begin + length;
+
+	/* verify that the address and length are reasonable */
+
+	if ( force || ( (begin >= (uint32)&start) && (stop > begin) &&
+					(((void *)stop) < maxheap)) ) {
+
+		/* values are valid; perform dump */
+
+		chptr = (char *)begin;
+		for (l=0; l<length; l+=16) {
+			printf("%08x: ", begin);
+			addr = (uint32 *)begin;
+			for (i=0; i<4; i++) {
+				printf("%08x ",*addr++);
+			}
+			printf("  *");
+			for (i=0; i<16; i++) {
+				ch = *chptr++;
+				if ( (ch >= 0x20) && (ch <= 0x7e) ) {
+					printf("%c",ch);
+				} else {
+					printf(".");
+				}
+			}
+			printf("*\n");
+			begin += 16;
+		}
+		return 0;
+	} else {
+		printf("Values are out of range; use -f to force\n");
+	}
+	return 1;
+}
+
+/*------------------------------------------------------------------------
+ * parse - parse an argument that is either a decimal or hex value
+ *------------------------------------------------------------------------
+ */
+static	uint32	parseval(
+	  char	*string			/* argument string to parse	*/
+	)
+{
+	uint32	value;			/* value to return		*/
+	char	ch;			/* next character		*/
+	
+
+	value = 0;
+
+	/* argument string must consists of decimal digits or	*/
+	/*	0x followed by hex digits			*/
+
+	ch = *string++;
+	if (ch == '0') {		/* hexadecimal */
+		if (*string++ != 'x') {
+			return 0;
+		}
+		for (ch = *string++; ch != NULLCH; ch = *string++) {
+			if ((ch >= '0') && (ch <= '9') ) {
+				value = 16*value + (ch - '0');
+			} else if ((ch >= 'a') && (ch <= 'f') ) {
+				value = 16*value + 10 + (ch - 'a');
+			} else if ((ch >= 'A') && (ch <= 'F') ) {
+				value = 16*value + 10 + (ch - 'A');
+			} else {
+				return 0;
+			}
+		}
+	} else {			/* decimal */
+		while (ch != NULLCH) {
+			if ( (ch < '0') || (ch > '9') ) {
+				return 0;
+			}
+			value = 10*value + (ch - '0');
+			ch = *string++;
+		}
+	}
+	return value;
+}
diff --git a/shell.orig/xsh_memstat.c b/shell.orig/xsh_memstat.c
new file mode 100644
index 0000000..1648c21
--- /dev/null
+++ b/shell.orig/xsh_memstat.c
@@ -0,0 +1,115 @@
+/* xsh_memstat.c - xsh_memstat */
+
+#include <xinu.h>
+#include <stdio.h>
+#include <string.h>
+
+static	void	printMemUse(void);
+static	void	printFreeList(void);
+
+/*------------------------------------------------------------------------
+ * xsh_memstat - Print statistics about memory use and dump the free list
+ *------------------------------------------------------------------------
+ */
+shellcmd xsh_memstat(int nargs, char *args[])
+{
+
+	/* For argument '--help', emit help about the 'memstat' command	*/
+
+	if (nargs == 2 && strncmp(args[1], "--help", 7) == 0) {
+		printf("use: %s \n\n", args[0]);
+		printf("Description:\n");
+		printf("\tDisplays the current memory use and prints the\n");
+		printf("\tfree list.\n");
+		printf("Options:\n");
+		printf("\t--help\t\tdisplay this help and exit\n");
+		return 0;
+	}
+
+	/* Check for valid number of arguments */
+
+	if (nargs > 1) {
+		fprintf(stderr, "%s: too many arguments\n", args[0]);
+		fprintf(stderr, "Try '%s --help' for more information\n",
+				args[0]);
+		return 1;
+	}
+
+	printMemUse();
+	printFreeList();
+
+	return 0;
+}
+
+
+/*------------------------------------------------------------------------
+ * printFreeList - Walk the list of free memory blocks and print the
+ *			location and size of each
+ *------------------------------------------------------------------------
+ */
+static void printFreeList(void)
+{
+	struct memblk *block;
+
+	/* Output a heading for the free list */
+
+	printf("Free List:\n");
+	printf("Block address  Length (dec)  Length (hex)\n");
+	printf("-------------  ------------  ------------\n");
+	
+	for (block = memlist.mnext; block != NULL; block = block->mnext) {
+		printf("  0x%08x    %9d     0x%08x\n", block,
+			block->mlength, block->mlength);
+	}
+	printf("\n");
+}
+
+extern void start(void);
+extern void *_end;
+
+/*------------------------------------------------------------------------
+ * printMemUse - Print statistics about memory use
+ *------------------------------------------------------------------------
+ */
+static void printMemUse(void)
+{
+	int i;				/* Index into process table	*/
+	uint32 code = 0;		/* Total Xinu code memory	*/
+	uint32 stack = 0;		/* Total used stack memory	*/
+	uint32 mspstack = HANDLERSTACK; /* Total used handler stack mem */
+	uint32 kheap = 0;		/* Free kernel heap memory	*/
+	uint32 kfree = 0;		/* Total free memory		*/
+	struct memblk *block;	 	/* Ptr to memory block		*/
+
+	/* Calculate amount of text memory */
+
+	code = (uint32)&etext - (uint32)&text;
+
+	/* Calculate amount of allocated stack memory */
+	/*  Skip the NULL process since it has a private stack */
+
+	for (i = 0; i < NPROC; i++) {
+		if (proctab[i].prstate != PR_FREE) {
+			stack += (uint32)proctab[i].prstklen;
+		}
+	}
+
+	/* Calculate the amount of memory on the free list */
+
+	for (block = memlist.mnext; block != NULL; block = block->mnext) {
+		kfree += block->mlength;
+	}
+
+	/* Calculate the amount of free kernel heap memory */
+
+	kheap = kfree - stack;
+
+	/* Output statistics on current memory use */
+
+	printf("Current system memory statistics:\n");
+	printf("---------------------------------\n");
+	printf("%10d bytes (0x%08x) of Xinu code\n", code, code);
+	printf("%10d bytes (0x%08x) of allocated stack space\n", stack, stack);
+	printf("%10d bytes (0x%08x) of allocated kernel stack space\n", mspstack, mspstack);
+	printf("%10d bytes (0x%08x) of available kernel heap space\n\n", kheap, kheap);
+}
diff --git a/shell.orig/xsh_ps.c b/shell.orig/xsh_ps.c
new file mode 100644
index 0000000..5083e86
--- /dev/null
+++ b/shell.orig/xsh_ps.c
@@ -0,0 +1,69 @@
+/* xsh_ps.c - xsh_ps */
+
+#include <xinu.h>
+#include <stdio.h>
+#include <string.h>
+
+/*------------------------------------------------------------------------
+ * xsh_ps - shell command to print the process table
+ *------------------------------------------------------------------------
+ */
+shellcmd xsh_ps(int nargs, char *args[])
+{
+
+//	uint32 * linkreg;
+//	asm volatile ("mov %0, lr" : : "r" (linkreg));
+//	kprintf("LINK REG: %x\n", linkreg);
+
+	struct	procent	*prptr;		/* pointer to process		*/
+	int32	i;			/* index into proctabl		*/
+	char *pstate[]	= {		/* names for process states	*/
+		"free ", "curr ", "ready", "recv ", "sleep", "susp ",
+		"wait ", "rtime"};
+
+	/* For argument '--help', emit help about the 'ps' command	*/
+
+
+	if (nargs == 2 && strncmp(args[1], "--help", 7) == 0) {
+		printf("Use: %s\n\n", args[0]);
+		printf("Description:\n");
+		printf("\tDisplays information about running processes\n");
+		printf("Options:\n");
+		printf("\t--help\t display this help and exit\n");
+		return 0;
+	}
+
+	/* Check for valid number of arguments */
+
+	if (nargs > 1) {
+		fprintf(stderr, "%s: too many arguments\n", args[0]);
+		fprintf(stderr, "Try '%s --help' for more information\n",
+				args[0]);
+		return 1;
+	}
+
+	/* Print header for items from the process table */
+
+	printf("%3s %-16s %5s %4s %4s %10s %-10s %10s\n",
+		   "Pid", "Name", "State", "Prio", "Ppid", "Stack Base",
+		   "Stack Ptr", "Stack Size");
+
+	printf("%3s %-16s %5s %4s %4s %10s %-10s %10s\n",
+		   "---", "----------------", "-----", "----", "----",
+		   "----------", "----------", "----------");
+
+	/* Output information for each process */
+
+	for (i = 0; i < NPROC; i++) {
+		prptr = &proctab[i];
+		if (prptr->prstate == PR_FREE) {  /* skip unused slots	*/
+			continue;
+		}
+		printf("%3d %-16s %s %4d %4d 0x%08X 0x%08X %8d\n",
+			i, prptr->prname, pstate[(int)prptr->prstate],
+			prptr->prprio, prptr->prparent, prptr->prstkbase,
+			prptr->prstkptr, prptr->prstklen);
+	}
+
+	return 0;
+}
diff --git a/shell.orig/xsh_rdstest.c b/shell.orig/xsh_rdstest.c
new file mode 100644
index 0000000..949e2e9
--- /dev/null
+++ b/shell.orig/xsh_rdstest.c
@@ -0,0 +1,118 @@
+/* xsh_rdstest.c - xsh_rdstest */
+#include <xinu.h>
+#include <stdio.h>
+
+/*------------------------------------------------------------------------
+ * xsh_rdstest - shell to print the time the system has been up
+ *------------------------------------------------------------------------
+ */
+shellcmd xsh_rdstest(int nargs, char *args[])
+{
+	bool8	err;
+	int32	retval;
+	int32	i, j;
+	char	dskname[] = "TestDisk";
+
+	char	buff[2048];
+	char	buff2[2048];
+
+	retval = open(RDISK,dskname,"rw");
+
+	if (retval < 0) {
+		kprintf("xsh_rdstest: open %s returns %s, stopping\r\n",
+			dskname, retval==SYSERR?"SYSERR":"TIMEOUT");
+		close( RDISK );
+		return 1;
+	} else {
+		kprintf("xsh_rdstest: open %s returns %d\r\n",
+			dskname, retval);
+	}
+
+	kprintf("writing eight blocks to the disk\r\n");
+	for (i=7; i>=0; i--) {
+		memset(buff, (char)(i&0xff), RD_BLKSIZ);
+		kprintf("\n\r*** writing block %d\n\r",i);
+		retval = write(RDISK, buff, i);
+		if (retval < 0) {
+		   kprintf("write to block %d returns %d\r\n", i, retval);
+		}
+	}
+	kprintf("reading block 1\n\r");
+	retval = read(RDISK, buff, 1);
+	kprintf("read from block 1 has return value %d\r\n", retval);
+
+	err = 0;
+	for (i=0; i<RD_BLKSIZ; i++) {
+		if (buff[i] != (char) (0xff&1)) {
+			err = 1;
+			break;
+		}
+	}
+	if (err == 0) {
+		kprintf("Block 1 came back intact!!!\r\n");
+	} else {
+		kprintf("Sadly  :-( byte %d is not correct!!!\r\n", i);
+	}
+
+	kprintf("reading block 6\n\r");
+	retval = read(RDISK, buff, 6);
+	err = 0;
+	for (i=0; i<RD_BLKSIZ; i++) {
+		if (buff[i] != (char) (0xff&6)) {
+			err = 1;
+			break;
+		}
+	}
+	if (err == 0) {
+		kprintf("Block 6 came back intact!!!\r\n");
+	} else {
+		kprintf("Sadly  :-( byte %d is not correct!!!\r\n", i);
+	}
+
+	j = 0;
+	for (i=0; i<RD_BLKSIZ; i++) {
+		buff2[i] = "abcdefghijklmnopqrstuvwxyz"[j++];
+		j %= 13;
+	}
+
+	kprintf("rewriting block 5\n\r");
+	retval = write(RDISK, buff2, 5);
+	kprintf("write to block 5 has return value %d\r\n", retval);
+
+	kprintf("reading block 5\n\r");
+	retval = read(RDISK, buff2, 5);
+
+	err = 0;
+	for (i=0; i<RD_BLKSIZ; i++) {
+		if (buff2[i] != buff[i]) {
+			err = 1;
+			break;
+		}
+	}
+
+	if (err == 0) {
+		kprintf("Block 5 came back intact!!!\r\n");
+	} else {
+		kprintf("Sadly  :-( byte %d is not correct!!!\r\n", i);
+	}
+
+	memset(buff, NULLCH, RD_BLKSIZ);
+
+	kprintf("reading block 6 again\n\r");
+	retval = read(RDISK, buff, 6);
+	kprintf("read from block 6 has return value %d\r\n", retval);
+
+	err = 0;
+	for (i=0; i<RD_BLKSIZ; i++) {
+		if ( buff[i] != (char)(0xff&6) ) {
+	 		err = 1;
+			break;
+		}
+	}
+	if (err == 0) {
+		kprintf("Got back identical results!!!\r\n");
+	} else {
+		kprintf("Sadly  :-( byte %d differs!!!\r\n", i);
+	}
+	return 0;
+}
diff --git a/shell.orig/xsh_sleep.c b/shell.orig/xsh_sleep.c
new file mode 100644
index 0000000..042f0f7
--- /dev/null
+++ b/shell.orig/xsh_sleep.c
@@ -0,0 +1,58 @@
+/* xsh_sleep.c - xsh_sleep */
+
+#include <xinu.h>
+#include <stdio.h>
+#include <string.h>
+
+/*------------------------------------------------------------------------
+ * xsh_sleep  -  Shell command to delay for a specified number of seconds
+ *------------------------------------------------------------------------
+ */
+shellcmd xsh_sleep(int nargs, char *args[])
+{
+	int32	delay;			/* Delay in seconds		*/
+	char	*chptr;			/* Walks through argument	*/
+	char	ch;			/* Next character of argument	*/
+
+	/* For argument '--help', emit help about the 'sleep' command	*/
+
+	if (nargs == 2 && strncmp(args[1], "--help", 7) == 0) {
+		printf("Use: %s\n\n", args[0]);
+		printf("Description:\n");
+		printf("\tDelay for a specified number of seconds\n");
+		printf("Options:\n");
+		printf("\t--help\t display this help and exit\n");
+		return 0;
+	}
+
+	/* Check for valid number of arguments */
+
+	if (nargs > 2) {
+		fprintf(stderr, "%s: too many arguments\n", args[0]);
+		fprintf(stderr, "Try '%s --help' for more information\n",
+				args[0]);
+		return 1;
+	}
+
+	if (nargs != 2) {
+		fprintf(stderr, "%s: argument in error\n", args[0]);
+		fprintf(stderr, "Try '%s --help' for more information\n",
+				args[0]);
+		return 1;
+	}
+
+	chptr = args[1];
+	ch = *chptr++;
+	delay = 0;
+	while (ch != NULLCH) {
+		if ( (ch < '0') || (ch > '9') ) {
+			fprintf(stderr, "%s: nondigit in argument\n",
+				args[0]);
+			return 1;
+		}
+		delay = 10*delay + (ch - '0');
+		ch = *chptr++;
+	}
+	sleep(delay);
+	return 0;
+}
diff --git a/shell.orig/xsh_uptime.c b/shell.orig/xsh_uptime.c
new file mode 100644
index 0000000..f691064
--- /dev/null
+++ b/shell.orig/xsh_uptime.c
@@ -0,0 +1,76 @@
+/* xsh_uptime.c - xsh_uptime */
+
+#include <xinu.h>
+#include <stdio.h>
+#include <string.h>
+
+/*------------------------------------------------------------------------
+ * xsh_uptime - shell to print the time the system has been up
+ *------------------------------------------------------------------------
+ */
+shellcmd xsh_uptime(int nargs, char *args[])
+{
+
+	uint32	days, hrs, mins, secs;	/* days, hours, minutes,  and	*/
+					/*  seconds since system boot	*/
+	uint32	secperday = 86400;	/* seconds in a day		*/
+	uint32	secperhr  =  3600;	/* seconds in an hour		*/
+	uint32	secpermin =    60;	/* seconds in a minute		*/	
+
+	/* For argument '--help', emit help about the 'uptime' command	*/
+
+	if (nargs == 2 && strncmp(args[1], "--help", 7) == 0) {
+		printf("Use: %s\n\n", args[0]);
+		printf("Description:\n");
+		printf("\tDisplays time since the system booted\n");
+		printf("Options:\n");
+		printf("\t--help\t display this help and exit\n");
+		return 0;
+	}
+
+	/* Check for valid number of arguments */
+
+	if (nargs > 1) {
+		fprintf(stderr, "%s: too many arguments\n", args[0]);
+		fprintf(stderr, "Try '%s --help' for more information\n",
+				args[0]);
+		return 1;
+	}
+
+	secs = clktime;		/* total seconds since boot */
+
+	/* subtract number of whole days */
+
+	days  = secs/secperday;
+	secs -= days*secperday;
+
+	/* subtract number of hours */
+
+	hrs   = secs/secperhr;
+	secs -= hrs*secperhr;
+
+	/* subtract number of minutes */
+
+	mins  = secs/secpermin;
+	secs -= mins*secpermin;
+
+	printf("Xinu has been up ");
+	if (days > 0) {
+		printf(" %d day(s) ", days);
+	}
+
+	if (hrs > 0) {
+		printf(" %d hour(s) ", hrs);
+	}
+
+	if (mins > 0) {
+		printf(" %d minute(s) ", mins);
+	}
+
+	if (secs > 0) {
+		printf(" %d second(s) ", secs);
+	}
+	printf("\n");
+
+	return 0;
+}
diff --git a/shell/addargs.c b/shell/addargs.c
new file mode 100644
index 0000000..ba3b7f1
--- /dev/null
+++ b/shell/addargs.c
@@ -0,0 +1,93 @@
+/* addargs.c - addargs */
+
+#include <xinu.h>
+#include "shprototypes.h"
+
+/*------------------------------------------------------------------------
+ *  addargs  -  Add local copy of argv-style arguments to the stack of
+ *		  a command process that has been created by the shell
+ *------------------------------------------------------------------------
+ */
+status	addargs(
+	  pid32		pid,		/* ID of process to use		*/
+	  int32		ntok,		/* Count of arguments		*/
+	  int32		tok[],		/* Index of tokens in tokbuf	*/
+	  int32		tlen,		/* Length of data in tokbuf	*/
+	  char		*tokbuf,	/* Array of null-term. tokens	*/
+	  void 		*dummy		/* Dummy argument that was	*/
+					/*   used at creation and must	*/
+					/*   be replaced by a pointer	*/
+					/*   to an argument vector	*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	procent *prptr;		/* Ptr to process' table entry	*/
+	uint32	aloc;			/* Argument location in process	*/
+					/*   stack as an integer	*/
+	uint32	*argloc;		/* Location in process's stack	*/
+					/*   to place args vector	*/
+	char	*argstr;		/* Location in process's stack	*/
+					/*   to place arg strings	*/
+	uint32	*search;		/* pointer that searches for	*/
+					/*   dummy argument on stack	*/
+	uint32	*aptr;			/* Walks through args array	*/
+	int32	i;			/* Index into tok array		*/
+
+	mask = disable();
+
+	/* Check argument count and data length */
+
+	if ( (ntok <= 0) || (tlen < 0) ) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	prptr = &proctab[pid];
+
+	/* Compute lowest location in the process stack where the	*/
+	/*	args array will be stored followed by the argument	*/
+	/*	strings							*/
+	
+	aloc = (uint32) (prptr->prstkbase
+		- prptr->prstklen + sizeof(uint32));
+	argloc = (uint32*) ((aloc + 3) & ~0x3);	/* round multiple of 4	*/
+
+	/* Compute the first location beyond args array for the strings	*/
+
+	argstr = (char *) (argloc + (ntok+1));	/* +1 for a null ptr	*/
+
+	/* Set each location in the args vector to be the address of	*/
+	/*	string area plus the offset of this argument		*/
+
+	for (aptr=argloc, i=0; i < ntok; i++) {
+		*aptr++ = (uint32) (argstr + tok[i]);
+	}
+
+	/* Add a null pointer to the args array */
+
+	*aptr++ = (uint32)NULL;
+
+	/* Copy the argument strings from tokbuf into process's	stack	*/
+	/*	just beyond the args vector				*/
+
+	memcpy(aptr, tokbuf, tlen);
+
+	/* Find the second argument in process's stack */
+
+	for (search = (uint32 *)prptr->prstkptr;
+	     search < (uint32 *)prptr->prstkbase; search++) {
+
+		/* If found, replace with the address of the args vector*/
+
+		if (*search == (uint32)dummy) {
+			*search = (uint32)argloc;
+			restore(mask);
+			return OK;
+		}
+	}
+
+	/* Argument value not found on the stack - report an error */
+
+	restore(mask);
+	return SYSERR;
+}
diff --git a/shell/lexan.c b/shell/lexan.c
new file mode 100644
index 0000000..4e0cb8b
--- /dev/null
+++ b/shell/lexan.c
@@ -0,0 +1,148 @@
+/* lexan.c  - lexan */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * lexan  -  Ad hoc lexical analyzer to divide command line into tokens
+ *------------------------------------------------------------------------
+ */
+
+int32	lexan (
+	  char		*line,		/* Input line terminated with	*/
+					/*   NEWLINE or NULLCH		*/
+	  int32		len,		/* Length of the input line,	*/
+					/*   including NEWLINE		*/
+	  char		*tokbuf,	/* Buffer into which tokens are	*/
+					/*   stored with a null		*/
+					/*   following each token	*/
+	  int32		*tlen,		/* Place to store number of	*/
+					/*   chars in tokbuf		*/
+	  int32		tok[],		/* Array of pointers to the	*/
+					/*   start of each token	*/
+	  int32		toktyp[]	/* Array that gives the type	*/
+					/*   of each token		*/
+	)
+{
+	char	quote;			/* Character for quoted string  */
+	uint32	ntok;			/* Number of tokens found	*/
+	char	*p;			/* Pointer that walks along the	*/
+					/*   input line			*/
+	int32	tbindex;		/* Index into tokbuf		*/
+	char	ch;			/* Next char from input line	*/
+
+	/* Start at the beginning of the line with no tokens */
+
+	ntok = 0;
+	p = line;
+	tbindex = 0;
+
+	/* While not yet at end of line, get next token */
+
+	while ( (*p != NULLCH) && (*p != SH_NEWLINE) ) {
+
+		/* If too many tokens, return error */
+
+		if (ntok >= SHELL_MAXTOK) {
+			return SYSERR;
+		}
+
+		/* Skip whitespace before token */
+
+		while ( (*p == SH_BLANK) || (*p == SH_TAB) ) {
+			p++;
+		}
+
+		/* Stop parsing at end of line (or end of string) */
+
+		ch = *p;
+		if ( (ch==SH_NEWLINE) || (ch==NULLCH) ) {
+			*tlen = tbindex;
+			return ntok;
+		}
+
+		/* Set next entry in tok array to be an index to the	*/
+		/*   current location in the token buffer		*/
+
+		tok[ntok] = tbindex;	/* the start of the token	*/
+
+		/* Set the token type */
+
+		switch (ch) {
+
+		    case SH_AMPER:	toktyp[ntok] = SH_TOK_AMPER;
+					tokbuf[tbindex++] = ch;
+					tokbuf[tbindex++] = NULLCH;
+					ntok++;
+					p++;
+					continue;
+
+		    case SH_LESS:	toktyp[ntok] = SH_TOK_LESS;
+					tokbuf[tbindex++] = ch;
+					tokbuf[tbindex++] = NULLCH;
+					ntok++;
+					p++;
+					continue;
+
+		    case SH_GREATER:	toktyp[ntok] = SH_TOK_GREATER;
+					tokbuf[tbindex++] = ch;
+					tokbuf[tbindex++] = NULLCH;
+					ntok++;
+					p++;
+					continue;
+
+		    default:		toktyp[ntok] = SH_TOK_OTHER;
+		};
+
+		/* Handle quoted string (single or double quote) */
+
+		if ( (ch==SH_SQUOTE) || (ch==SH_DQUOTE) ) {
+			quote = ch;	/* remember opening quote */
+
+			/* Copy quoted string to arg area */
+
+			p++;	/* Move past starting quote */
+
+			while ( ((ch=*p++) != quote) && (ch != SH_NEWLINE)
+					&& (ch != NULLCH) ) {
+				tokbuf[tbindex++] = ch;
+			}
+			if (ch != quote) {  /* string missing end quote	*/
+				return SYSERR;
+			}
+
+			/* Finished string - count token and go on	*/
+
+			tokbuf[tbindex++] = NULLCH; /* terminate token	*/
+			ntok++;		/* count string as one token	*/
+			continue;	/* go to next token		*/
+		}
+
+		/* Handle a token other than a quoted string		*/
+
+		tokbuf[tbindex++] = ch;	/* put first character in buffer*/
+		p++;
+
+		while ( ((ch = *p) != SH_NEWLINE) && (ch != NULLCH)
+			&& (ch != SH_LESS)  && (ch != SH_GREATER)
+			&& (ch != SH_BLANK) && (ch != SH_TAB)
+			&& (ch != SH_AMPER) && (ch != SH_SQUOTE)
+			&& (ch != SH_DQUOTE) )	{
+				tokbuf[tbindex++] = ch;
+				p++;
+		}
+
+		/* Report error if other token is appended */
+
+		if (       (ch == SH_SQUOTE) || (ch == SH_DQUOTE)
+			|| (ch == SH_LESS)   || (ch == SH_GREATER) ) {
+			return SYSERR;
+		}
+
+		tokbuf[tbindex++] = NULLCH;	/* terminate the token	*/
+
+                ntok++;				/* count valid token	*/
+
+	}
+	*tlen = tbindex;
+	return ntok;
+}
diff --git a/shell/shell.c b/shell/shell.c
new file mode 100644
index 0000000..d8788f8
--- /dev/null
+++ b/shell/shell.c
@@ -0,0 +1,35 @@
+/* shell.c  -  shell */
+
+#include <xinu.h>
+//#include <stdio.h>
+#include "shprototypes.h"
+
+/************************************************************************/
+/* Table of Xinu shell commands and the function associated with each	*/
+/************************************************************************/
+// RAFA const	struct	cmdent	cmdtab[] = {
+
+/************************************************************************/
+/* shell  -  Provide an interactive user interface that executes	*/
+/*	     commands.  Each command begins with a command name, has	*/
+/*	     a set of optional arguments, has optional input or		*/
+/*	     output redirection, and an optional specification for	*/
+/*	     background execution (ampersand).  The syntax is:		*/
+/*									*/
+/*		   command_name [args*] [redirection] [&]		*/
+/*									*/
+/*	     Redirection is either or both of:				*/
+/*									*/
+/*				< input_file				*/
+/*			or						*/
+/*				> output_file				*/
+/*									*/
+/************************************************************************/
+
+process	shell (
+		did32	dev		/* ID of tty device from which	*/
+	)				/*   to accept commands		*/
+{
+	return OK;
+}
+
diff --git a/system/ascdate.c b/system/ascdate.c
new file mode 100644
index 0000000..04ff8c9
--- /dev/null
+++ b/system/ascdate.c
@@ -0,0 +1,231 @@
+/* ascdate.c - ascdate */
+
+#include <xinu.h>
+#include <stdio.h>
+
+// RAFA struct dateinfo Date = {0, FALSE, DATE_DST_AUTO,
+// RAFA 		       {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
+// RAFA 		       {"J", "F", "Mar", "A", "May", "Jun", "Jul",
+// RAFA 		        "Au", "S","O","N","D"},
+// RAFA 		       {"S", "M", "T", "W", "Th", "F", "Sa"}};
+
+		       // RAFA {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
+// RAFA 		        "Aug", "Sep","Oct","Nov","Dec"},
+// RAFA 		       {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"}};
+
+/*------------------------------------------------------------------------
+ *  ascdate  -  Format a date in ascii including day, year hours:mins:secs
+ *------------------------------------------------------------------------
+ */
+status	ascdate (
+	  uint32	now,		/* Date and time in xinu format	*/
+	  char		*str		/* String ( >= 20 chars long)	*/
+	)
+{
+	uint32	tmp;			/* Counts remaining seconds	*/
+					/*   during computations	*/
+	int32	year, month, day,	/* Values for various parts of	*/
+		hour, minute, second;	/*   the date			*/
+	uint32	days;			/* Number of days in a year	*/
+	uint32	leapyrs;		/* Number of leap years between	*/
+					/*   1970 and now		*/
+	uint32	shift;			/* Number of times the calendar	*/
+					/*   shifted by a day		*/
+	uint32	dayofweek;		/* Day of the week (0 - 6)	*/
+					/* For DST, day of the week for:*/
+	int32	jan1;			/*   January 1 this year	*/
+	int32	mar1;			/*   March 1 this year		*/
+	int32	nov1;			/*   November 1 this year	*/
+	int32	marss;			/* Day of second sunday in march*/
+	int32	novfs;			/* Day of second sunday in march*/
+	bool8	dst;			/* Should we adjust for DST?	*/
+	int32	i;			/* Indexes through months	*/
+
+	char	*zones[]  = {"EST", "CST", "MST", "PST"};
+	char	*dzones[] = {"EDT", "CDT", "MDT", "PDT"};
+
+	/* Compute the year (1970-2099) */
+
+	for (year=1970 ; TRUE ; year++) {
+		days = isleap(year) ? 366 : 365;
+		tmp = days * SECPERDY;
+		if (tmp > now)
+			break;
+		now -= tmp;
+	}
+
+	/* Compute the number of whole days that have already passed	*/
+	/*   during the current year (0 through 365)			*/
+
+	days = now / SECPERDY;
+
+	/* Compute the month (0-11) */
+
+	for (month=0 ; month<12 ; month++) {
+		// RAFA tmp = Date.dt_msize[month] * SECPERDY;
+		tmp = 1;
+		if ((month == 1) && isleap(year)) {
+			tmp += SECPERDY;
+		}
+		if (tmp > now)
+			break;
+		now -= tmp;
+	}
+
+	/* Compute the day of month (1-31) */
+
+	day = (int32)( now/SECPERDY ) + 1;
+	now %= SECPERDY;
+
+	/* Compute the hour (0-23) */
+
+	hour = (int32) ( now/SECPERHR );
+	now %= SECPERHR;
+
+	/* Compute the minutes (0-59) */
+
+	minute = now / SECPERMN;
+	now %= SECPERMN;
+
+	/* Compute the seconds (0-59) */
+	second = (int32) now;
+
+	/* Compute the day of the week (0-6)				*/
+	/*								*/
+	/*   Note: Jan 1, 1970 was a Thursday (4 on a 0 to 6 range)	*/
+	/* Add one day of the week each	full year (365%7 == 1) plus	*/
+	/*    one extra day for each leap year				*/
+
+	/* Compute number of leap years prior to current year */
+
+	leapyrs = (year-1969)/4;
+
+	/* Compute shift for all previous years (i.e., day of week of	*/
+	/* Jan 1 of the current year)					*/
+
+	shift = 4 + (year - 1970) + leapyrs;
+
+	/* Remember day of the week for Jan 1 this year (for DST)	*/
+
+	jan1 = shift % 7;
+
+	/* Add the number of days so far this year */
+
+	shift += days;
+
+	/* Convert to integer from 0 through 6 */
+
+	dayofweek = shift % 7;
+
+	/*								*/
+	/* 		Handle daylight savings time			*/
+	/*								*/
+	/*   Date.dt_daylight specifies whether to set it on, off,	*/
+	/*		or automatically compute the setting		*/
+	/*								*/
+
+	dst = FALSE;
+	// RAFA  if (Date.dt_daylight == DATE_DST_ON) {
+	// RAFA  	dst = TRUE;
+	// RAFA  } else if (Date.dt_daylight == DATE_DST_AUTO) {
+		
+		/* Automatic DST calculation: DST is on between 2:00 AM	*/
+		/*   the second Sunday of March and 2:00 AM the first	*/
+		/*   sunday in November					*/
+
+		/* Calculate day of the week for March 1		*/
+
+		// RAFA mar1 = (jan1 + Date.dt_msize[0] + Date.dt_msize[1] +
+						   //RAFA  isleap(year)) % 7;
+
+		/* Caculate day (1-31) of the second sunday in March	*/
+
+		if (mar1 == 0) {	/* Mar. 1 is a Sunday		*/
+			marss = 8;
+		} else {		/* Mar. 1 is Monday - Saturday	*/
+			marss = 15 - mar1;
+		}
+
+		/* Calculate day of the week for November 1		*/
+
+		nov1 = jan1;
+		// RAFA for (i=0; i<10; i++) {
+		// RAFA 	nov1 += Date.dt_msize[i];
+		// RAFA }
+		if (isleap(year)) {
+			nov1++;
+		}
+		nov1 = nov1 % 7;
+		if (nov1 == 0) {	/* Nov. 1 is a Sunday		*/
+			novfs = 1;
+		} else {		/* Nov. 1 is Monday - Saturday	*/
+			novfs = 8 - nov1;
+		}
+
+		/* Set dst based on time of the year */
+
+		/* DST is off during December, January, and Feburary */
+
+		if ( (month == 11) || (month == 0) || (month == 1) ) {
+			dst = FALSE;
+
+		/* DST is on from April through October */
+
+		} else if ( (month>2) && (month<10) ) {
+			dst = TRUE;
+
+		/* DST is on in March past 2 AM on the second Sunday	*/
+
+		} else if (month == 2) {
+
+			dst = FALSE;
+			if (day > marss) {
+				dst = TRUE;
+			} else if ( (day == marss) && (hour >= 2) ) {
+				dst = TRUE;
+			}
+
+		/* DST is on in November until 2 am on first Sunday	*/
+
+
+		} else if (month == 10) {
+
+			dst = TRUE;
+			if (day > novfs) {
+				dst = FALSE;
+			} else if ( (day == novfs) && (hour >= 1) ) {
+				dst = FALSE;
+			}
+		}
+	 // RAFA }
+
+	/* If we are doing DST, move ahead one hour and handle the	*/
+	/*   case where we move to the next day or the next month	*/
+
+	if (dst) {
+		hour++;
+
+		/* If day exceeded, move to next day */
+
+		if (hour > 23) {
+			hour = 0;
+			day++;
+
+			/* If month exceeded, move to next month */
+
+// RAFA			if (day > Date.dt_msize[month]) {
+				day = 1;
+				month++;
+
+				/* Stop here because DST does not occur	*/
+				/*  during the year boundary		*/
+// RAFA			}
+		}
+	}
+
+// RAFA	sprintf(str, "%3s  %3s %2d  %2d:%02d:%02d %s %d",
+// RAFA		Date.dt_dnam[dayofweek], Date.dt_mnam[month],
+// RAFA		day, hour, minute, second, dst? dzones[TIMEZONE-5]:
+// RAFA			zones[TIMEZONE-5], year);
+	return OK;
+}
diff --git a/system/blink_avr.c b/system/blink_avr.c
new file mode 100644
index 0000000..0fa217b
--- /dev/null
+++ b/system/blink_avr.c
@@ -0,0 +1,21 @@
+
+#include <avr/io.h>
+
+void my_delay(unsigned long delay) {
+  volatile unsigned long i = 0;
+  for (i = 0; i < delay; i++) {
+      __asm__ __volatile__ ("nop");
+  }
+}
+
+
+void blink_avr(void) {
+
+	DDRB = (1<<PB5); //Pin B5 Salida
+
+		PORTB |= (1<<PB5); //Ponemos el pin en alto
+		my_delay(200000);
+		PORTB &= ~(1<<PB5); //Ponemos el pin en bajo
+		my_delay(200000);
+}
+
diff --git a/system/bufinit.c b/system/bufinit.c
new file mode 100644
index 0000000..537f0be
--- /dev/null
+++ b/system/bufinit.c
@@ -0,0 +1,16 @@
+/* bufinit.c - bufinit */
+
+#include <xinu.h>
+
+struct	bpentry	buftab[NBPOOLS];		/* Buffer pool table	*/
+bpid32	nbpools;
+
+/*------------------------------------------------------------------------
+ *  bufinit  -  Initialize the buffer pool data structure
+ *------------------------------------------------------------------------
+ */
+status	bufinit(void)
+{
+	nbpools = 0;
+	return OK;
+}
diff --git a/system/chprio.c b/system/chprio.c
new file mode 100644
index 0000000..6c567d4
--- /dev/null
+++ b/system/chprio.c
@@ -0,0 +1,28 @@
+/* chprio.c - chprio */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  chprio  -  Change the scheduling priority of a process
+ *------------------------------------------------------------------------
+ */
+pri16	chprio(
+	  pid32		pid,		/* ID of process to change	*/
+	  pri16		newprio		/* New priority			*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	procent *prptr;		/* Ptr to process's table entry	*/
+	pri16	oldprio;		/* Priority to return		*/
+
+	mask = disable();
+	if (isbadpid(pid)) {
+		restore(mask);
+		return (pri16) SYSERR;
+	}
+	prptr = &proctab[pid];
+	oldprio = prptr->prprio;
+	prptr->prprio = newprio;
+	restore(mask);
+	return oldprio;
+}
diff --git a/system/clkhandler.c b/system/clkhandler.c
new file mode 100644
index 0000000..3aa5fac
--- /dev/null
+++ b/system/clkhandler.c
@@ -0,0 +1,63 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+/* clkhandler.c - clkhandler */
+
+#include <xinu.h>
+
+/*-----------------------------------------------------------------------
+ * clkhandler - high level clock interrupt handler
+ *-----------------------------------------------------------------------
+ */
+void clkhandler()
+{
+	struct timer_csreg *tptr;
+	tptr = (struct timer_csreg *)TIM2_BASE;
+
+	/* Clear interrupt flag */
+
+	tptr->sr &= ~(1 << TIM_UIF);
+
+	/* Increment 1000ms counter */
+
+	count1000++;
+
+	/* After 1 sec, increment clktime */
+
+	if(count1000 >= 1000) {
+		clktime++;
+		count1000 = 0;
+	}
+
+	/* check if sleep queue is empty */
+
+	if(!isempty(sleepq)) {
+		/* sleepq nonempty, decrement the key of */
+		/* topmost process on sleepq		 */
+
+		if((--queuetab[firstid(sleepq)].qkey) == 0) {
+
+			wakeup();
+		}
+	}
+
+	/* Decrement the preemption counter */
+	/* Reschedule if necessary	    */
+
+	if((--preempt) == 0) {
+		preempt = QUANTUM;
+		// PendSV call
+		 *SCB_ICSR |= (1 << PENDSV_INTR);
+	}
+}
diff --git a/system/clkinit.c b/system/clkinit.c
new file mode 100644
index 0000000..a4a82d3
--- /dev/null
+++ b/system/clkinit.c
@@ -0,0 +1,63 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+/* clkinit.c - clkinit STM32 */
+
+#include <xinu.h>
+
+uint32	clktime;		/* Seconds since boot			*/
+uint32  count1000;              /* ms since last clock tick             */
+qid16	sleepq;			/* Queue of sleeping processes		*/
+uint32	preempt;		/* Preemption counter			*/
+
+/*------------------------------------------------------------------------
+ * clkinit  -  Initialize the clock and sleep queue at startup
+ *------------------------------------------------------------------------
+ */
+void clkinit(void)
+{
+	
+	struct clock_csreg * clockptr;
+	struct timer_csreg * tptr;
+	clockptr = (struct clock_csreg *)CLOCK_BASE;
+	tptr = (struct timer_csreg *)TIM2_BASE;
+
+	sleepq = newqueue();	/* Allocate a queue to hold the delta	*/
+				/*   list of sleeping processes		*/
+	preempt = QUANTUM;	/* Set the preemption time		*/
+	clktime = 0;		/* Start counting seconds		*/
+        count1000 = 0;
+
+	/* Enable timer peripheral */
+	clockptr->apb1enr |= (1 << TIM2EN);
+	
+	/* Configuration for 1ms interrupt timer 
+	Based on 8 MHz chip CLK / 2 */
+	tptr->cr1 |= (1 << TIM_URS);
+	tptr->psc = 0x7; /* Set to 0x3 for 1Mhz */
+	tptr->arr = 0x1000; /* Set to 1000 */
+	tptr->dier |= 0x1; /* Enable interrupts */
+
+	/* Set interrupt vector for timer */
+	set_evec(TIM2_IRQ, (uint32)clkhandler);
+	*NVIC_ISER0 |= (1 << 28);
+
+	/* Set interrupt for PendSV: a pendsv call will execute the scheduler  */
+	set_evec(PENDSV_ENTRY, (uint32)resched);
+
+	/* Enable and start timer */
+	tptr->cr1 |= (1 << TIM_CEN);
+	
+	return;
+}
diff --git a/system/close.c b/system/close.c
new file mode 100644
index 0000000..52a701e
--- /dev/null
+++ b/system/close.c
@@ -0,0 +1,26 @@
+/* close.c - close */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  close  -  Close a device
+ *------------------------------------------------------------------------
+ */
+syscall	close(
+	  did32		descrp		/* Descriptor for device	*/
+	)
+{
+	intmask		mask;		/* Saved interrupt mask		*/
+	struct	dentry	*devptr;	/* Entry in device switch table	*/
+	int32		retval;		/* Value to return to caller	*/
+
+	mask = disable();
+	if (isbaddev(descrp)) {
+		restore(mask);
+		return SYSERR;
+	}
+	devptr = (struct dentry *) &devtab[descrp];
+	retval = (*devptr->dvclose) (devptr);
+	restore(mask);
+	return retval;
+}
diff --git a/system/control.c b/system/control.c
new file mode 100644
index 0000000..7581177
--- /dev/null
+++ b/system/control.c
@@ -0,0 +1,29 @@
+/* control.c - control */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  control  -  Control a device or a driver (e.g., set the driver mode)
+ *------------------------------------------------------------------------
+ */
+syscall	control(
+	  did32		descrp,		/* Descriptor for device	*/
+	  int32		func,		/* Specific control function	*/
+	  int32		arg1,		/* Specific argument for func	*/
+	  int32		arg2		/* Specific argument for func	*/
+	)
+{
+	intmask		mask;		/* Saved interrupt mask		*/
+	struct dentry	*devptr;	/* Entry in device switch table	*/
+	int32		retval;		/* Value to return to caller	*/
+
+	mask = disable();
+	if (isbaddev(descrp)) {
+		restore(mask);
+		return SYSERR;
+	}
+	devptr = (struct dentry *) &devtab[descrp];
+	retval = (*devptr->dvcntl) (devptr, func, arg1, arg2);
+	restore(mask);
+	return retval;
+}
diff --git a/system/create.c b/system/create.c
new file mode 100644
index 0000000..ce6f9c6
--- /dev/null
+++ b/system/create.c
@@ -0,0 +1,118 @@
+/* create.c - create, newpid */
+
+#include <xinu.h>
+
+local	pid32 newpid();
+
+#define	roundew(x)	( (x+3)& ~0x3)
+
+//RAFA
+
+char nombre[10];
+
+/*------------------------------------------------------------------------
+ *  create  -  create a process to start running a procedure
+ *------------------------------------------------------------------------
+ */
+pid32	create(
+	  void		*procaddr,	/* procedure address		*/
+	  uint32	ssize,		/* stack size in bytes		*/
+	  pri16		priority,	/* process priority > 0		*/
+	  char		*name,		/* name (for debugging)		*/
+	  uint32	nargs,		/* number of args that follow	*/
+	  ...
+	)
+{
+	intmask 	mask;    	/* interrupt mask		*/
+	pid32		pid;		/* stores new process id	*/
+	struct	procent	*prptr;		/* pointer to proc. table entry */
+	int32		i;
+	uint32		*a;		/* points to list of args	*/
+	uint32		*saddr;		/* stack address		*/
+
+
+	mask = disable();
+	if (ssize < MINSTK)
+		ssize = MINSTK;
+	ssize = (uint32) roundew(ssize);
+	strncpy(nombre, name, 4);
+	if (((saddr = (uint32 *)getstk(ssize)) ==
+	     (uint32 *)SYSERR ) ||
+	     (pid=newpid()) == SYSERR || priority < 1 ) {
+		restore(mask);
+		return SYSERR;
+	}
+
+
+	
+	prcount++;
+	prptr = &proctab[pid];
+
+	/* initialize process table entry for new process */
+	prptr->prstate = PR_SUSP;	/* initial state is suspended	*/
+	prptr->prprio = priority;
+	prptr->prstkbase = (char *)saddr;
+	prptr->prstklen = ssize;
+	prptr->prname[PNMLEN-1] = NULLCH;
+	for (i=0 ; i<PNMLEN-1 && (prptr->prname[i]=name[i])!=NULLCH; i++)
+		;
+	prptr->prsem = -1;
+	prptr->prparent = (pid32)getpid();
+	prptr->prhasmsg = FALSE;
+
+	/* set up initial device descriptors for the shell		*/
+	prptr->prdesc[0] = CONSOLE;	/* stdin  is CONSOLE device	*/
+	prptr->prdesc[1] = CONSOLE;	/* stdout is CONSOLE device	*/
+	prptr->prdesc[2] = CONSOLE;	/* stderr is CONSOLE device	*/
+
+
+	/* Initialize stack as if the process was called		*/
+	uint32 * tmpstk;
+	uint32 * extraregs;
+	a = (uint32 *)(&nargs + 1);
+	tmpstk = ((uint32) saddr) - 0x1C;
+	extraregs = ((uint32) tmpstk) - 0x20; /* r4 - r11 */
+
+	for (int i = 0; i < nargs; i++) {
+		tmpstk[i] = (uint32) *a++;
+	}
+
+	tmpstk[5] = (uint32) userret;	/* LR */
+	tmpstk[6] = (uint32) procaddr; /* Function */
+	tmpstk[7] = (uint32) 0x01000000; /* Flag register */
+
+	
+	for (int i = 0; i <= 7; i++) {
+		extraregs[i] = 0x0; /* Initialize to zero */
+	}
+	prptr->prstkptr = (char *)extraregs;
+
+	restore(mask);
+	return pid;
+}
+
+/*------------------------------------------------------------------------
+ *  newpid  -  Obtain a new (free) process ID
+ *------------------------------------------------------------------------
+ */
+local	pid32	newpid(void)
+{
+	uint32	i;			/* iterate through all processes*/
+//	static	pid32 nextpid = 1;	/* position in table to try or	*/
+	static	pid32 nextpid = 0;	/* position in table to try or	*/
+					/*  one beyond end of table	*/
+
+	/* check all NPROC slots */
+
+	for (i = 0; i < NPROC; i++) {
+		nextpid %= NPROC;	/* wrap around to beginning */
+		if (proctab[nextpid].prstate == PR_FREE) {
+			return nextpid++;
+		} else {
+			nextpid++;
+		}
+	}
+	if (strncmp(nombre, "Main", 4) == 0)
+		notmain(); // RAFA
+	return (pid32) SYSERR;
+}
diff --git a/system/debug.c b/system/debug.c
new file mode 100644
index 0000000..55cf538
--- /dev/null
+++ b/system/debug.c
@@ -0,0 +1,78 @@
+/* debug.c  -  hexdump_print, hexdump */
+
+#include <xinu.h>
+#include <stdio.h>
+#include <debug.h>
+
+static void hexdump_print(byte, byte);
+
+/*------------------------------------------------------------------------
+ *  hexdump_print   -  Print a byte in ASCII or hex
+ *------------------------------------------------------------------------
+ */
+static void hexdump_print(
+	 byte	data,			/* Item to print		*/
+	 byte	mode			/* ASCII or hex mode		*/
+	)
+{
+    switch (mode)
+    {
+    case DEBUG_ASCII:
+        data = (' ' <= data && data <= '~') ? data : '.';
+        fprintf(stdout, "%c", data);
+        break;
+    case DEBUG_HEX:
+        fprintf(stdout, "%02x ", data);
+        break;
+    default:
+        break;
+    }
+}
+
+
+/*------------------------------------------------------------------------
+ *  hexdump   -  Dump a region of memory
+ *------------------------------------------------------------------------
+ */
+void	hexdump(
+	 void	*buffer,		/* Addresss of memory area	*/
+	 uint32	length,			/* Length in bytes		*/
+	 bool8	canon			/* Print in ASCII or hex	*/
+	)
+{
+    uint32 m, n, remain;
+
+    byte *b = (byte *)buffer;
+
+    for (n = 0; n < length; n += 0x10) {
+        fprintf(stdout, "%08x ", (uint32)buffer + n);
+
+        remain = length - n;
+
+        for (m = 0; m < remain && m < 0x10; m++) {
+            if (m % 0x08 == 0) {
+                fprintf(stdout, " ");
+            }
+            hexdump_print(b[n + m], DEBUG_HEX);
+        }
+
+        /* Pad the rest if needed */
+        if (remain < 0x10) {
+            for (m = 0; m < 0x10 - remain; m++) {
+                if ((0 != m) && (0 == m % 0x08)) {
+                    fprintf(stdout, " ");
+                }
+                fprintf(stdout, "   ");
+            }
+        }
+
+        if (canon == TRUE) {
+            fprintf(stdout, " |");
+            for (m = 0; m < remain && m < 0x10; m++) {
+                hexdump_print(b[n + m], DEBUG_ASCII);
+            }
+            fprintf(stdout, "|");
+        }
+        fprintf(stdout, "\n");
+    }
+}
diff --git a/system/evec.c b/system/evec.c
new file mode 100644
index 0000000..f20cbba
--- /dev/null
+++ b/system/evec.c
@@ -0,0 +1,150 @@
+/* evec.c -- initintc, set_evec	*/
+
+typedef unsigned int size_t;
+#include <avr/pgmspace.h>
+
+#include <xinu.h>
+#include <stdio.h>
+
+
+uint32	__attribute__((aligned(0x100))) intc_vector[92];	/* Interrupt vector	*/
+
+/* Each message corresponds to an exception in the vector table. */
+char * exception_message(uint8 intnr) {
+
+
+/* RAFA 
+E_A    "--",
+E_B    "RESET",
+E_etc    "NMI",
+    "HARD FAULT",
+    "MEMMANAGE FAULT",
+    "BUS FAULT",
+    "USAGE FAULT",
+    "RESERVED",
+    "RESERVED",
+    "RESERVED",
+    "RESERVED",
+    "SVC",
+    "DEBUG MONITOR",
+    "RESERVED",
+    "RESERVED",
+    "RESERVED",
+    "RESERVED",
+    "PENDSV",
+    "SYSTICK",
+    "IRQ1",
+    "IRQ2",
+    "IRQ3",
+    "IRQ4",
+    // add more if needed
+*/
+// RAFA char * messages[] = {
+const char messages[] PROGMEM = {
+    'A',
+    'B',
+    'C',
+    'D',
+    'E',
+    'F',
+    'G',
+    'H',
+    'I',
+    'J',
+    'K',
+    'L',
+    'M',
+    'N',
+    'N',
+    'N',
+    'N',
+    'O',
+    'P',
+    'Q',
+    'R',
+    'S',
+    'T',
+    // add more if needed
+};
+
+if (intnr < 20) // TODO: strlen
+	return pgm_read_word(&messages[intnr]);
+
+return "UNKNOWN";
+
+}
+
+__attribute__ ((naked)) void * dummy_isr(void) {
+
+	uint32 * current_sp;
+
+	/* Test whether system call was invoked from supervisor (use MSP) or
+	 * user (use PSP) mode */
+	/*	asm volatile (
+	"tst lr, #4" "\n\t"
+	"ite eq" "\n\t"
+	"mrseq %0, msp" "\n\t"
+	"mrsne %0, psp" : "=r" (current_sp)); */
+
+/*
+	asm volatile ("mrs %0, psp" : "=r" (current_sp));
+
+      	uint8 nr = *SCB_ICSR & 0xFF;
+      	kprintf("EXCEPTION: %s\n", exception_message(nr));
+	kprintf("STACKFRAME:\n");
+	for (int i = 0; i < 8; i++) {
+		kprintf("STACK[%d]: %x\n", i, current_sp[i]);
+	}
+	
+	halt(); 
+*/
+}
+/*------------------------------------------------------------------------
+ * initintc - Initialize the Interrupt Controller
+ *------------------------------------------------------------------------
+ */
+int32	initintc()
+{
+	/* System control block */
+	struct	scb_csreg *csrptr = (struct scb_csreg *)0xE000ED00;
+	
+	/* clear entire IVT location in memory  */
+	memset(&intc_vector, 0, (sizeof(uint32) * 92));
+
+	/* set dummy handlers */
+	for (int i = 1; i <= 64 ; i++) {
+		set_evec(i, (uint32) dummy_isr);
+	}
+
+	/* Enable memory management, bus and usage fault exceptions handlers
+	 * If these are not enabled, the processor treats them as a hard
+	 * faults. Unpriviliged access will cause a busfault in case no MPU */
+	csrptr->shcsr |= (1 << MPUFAULT_EN) | (1 << BUSFAULT_EN) | (1 << USAGEFAULT_EN);	
+	
+	/* The vector table is intially at 0x0. The vector table can be
+	 * relocated to other memory locations. We can do this by setting 
+	 * a register in the NVIC called the vector table offset register */
+	csrptr->vtor = (uint32) &intc_vector;
+	
+	return OK;
+}
+
+/*------------------------------------------------------------------------
+ * set_evec - set exception vector to point to an exception handler
+ *------------------------------------------------------------------------
+ */
+int32	set_evec(uint32 xnum, uint32 handler)
+{
+	/* There are only 92 interrupts allowed 0-2 */
+
+	if(xnum > 92) {
+		return SYSERR;
+	}
+
+	/* Install the handler */
+
+	intc_vector[xnum] = handler;
+
+	return OK;
+}
+
diff --git a/system/evec.c.orig b/system/evec.c.orig
new file mode 100644
index 0000000..31d3bc8
--- /dev/null
+++ b/system/evec.c.orig
@@ -0,0 +1,117 @@
+/* evec.c -- initintc, set_evec	*/
+
+#include <xinu.h>
+#include <stdio.h>
+
+
+uint32	__attribute__((aligned(0x100))) intc_vector[92];	/* Interrupt vector	*/
+
+/* Each message corresponds to an exception in the vector table. */
+char * exception_message(uint8 intnr) {
+
+char * messages[] = {
+    "--",
+    "RESET",
+    "NMI",
+    "HARD FAULT",
+    "MEMMANAGE FAULT",
+    "BUS FAULT",
+    "USAGE FAULT",
+    "RESERVED",
+    "RESERVED",
+    "RESERVED",
+    "RESERVED",
+    "SVC",
+    "DEBUG MONITOR",
+    "RESERVED",
+    "RESERVED",
+    "RESERVED",
+    "RESERVED",
+    "PENDSV",
+    "SYSTICK",
+    "IRQ1",
+    "IRQ2",
+    "IRQ3",
+    "IRQ4",
+    // add more if needed
+};
+
+if (intnr < 20) // TODO: strlen
+	return messages[intnr];
+
+return "UNKNOWN";
+
+}
+
+__attribute__ ((naked)) void * dummy_isr(void) {
+
+	uint32 * current_sp;
+
+	/* Test whether system call was invoked from supervisor (use MSP) or
+	 * user (use PSP) mode */
+	/*	asm volatile (
+	"tst lr, #4" "\n\t"
+	"ite eq" "\n\t"
+	"mrseq %0, msp" "\n\t"
+	"mrsne %0, psp" : "=r" (current_sp)); */
+
+	asm volatile ("mrs %0, psp" : "=r" (current_sp));
+
+      	uint8 nr = *SCB_ICSR & 0xFF;
+      	kprintf("EXCEPTION: %s\n", exception_message(nr));
+	kprintf("STACKFRAME:\n");
+	for (int i = 0; i < 8; i++) {
+		kprintf("STACK[%d]: %x\n", i, current_sp[i]);
+	}
+	
+	halt(); 
+}
+/*------------------------------------------------------------------------
+ * initintc - Initialize the Interrupt Controller
+ *------------------------------------------------------------------------
+ */
+int32	initintc()
+{
+	/* System control block */
+	struct	scb_csreg *csrptr = (struct scb_csreg *)0xE000ED00;
+	
+	/* clear entire IVT location in memory  */
+	memset(&intc_vector, 0, (sizeof(uint32) * 92));
+
+	/* set dummy handlers */
+	for (int i = 1; i <= 64 ; i++) {
+		set_evec(i, (uint32) dummy_isr);
+	}
+
+	/* Enable memory management, bus and usage fault exceptions handlers
+	 * If these are not enabled, the processor treats them as a hard
+	 * faults. Unpriviliged access will cause a busfault in case no MPU */
+	csrptr->shcsr |= (1 << MPUFAULT_EN) | (1 << BUSFAULT_EN) | (1 << USAGEFAULT_EN);	
+	
+	/* The vector table is intially at 0x0. The vector table can be
+	 * relocated to other memory locations. We can do this by setting 
+	 * a register in the NVIC called the vector table offset register */
+	csrptr->vtor = (uint32) &intc_vector;
+	
+	return OK;
+}
+
+/*------------------------------------------------------------------------
+ * set_evec - set exception vector to point to an exception handler
+ *------------------------------------------------------------------------
+ */
+int32	set_evec(uint32 xnum, uint32 handler)
+{
+	/* There are only 92 interrupts allowed 0-2 */
+
+	if(xnum > 92) {
+		return SYSERR;
+	}
+
+	/* Install the handler */
+
+	intc_vector[xnum] = handler;
+
+	return OK;
+}
+
diff --git a/system/exit.c b/system/exit.c
new file mode 100644
index 0000000..e648c3e
--- /dev/null
+++ b/system/exit.c
@@ -0,0 +1,12 @@
+/* exit.c - exit */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  exit  -  Cause the calling process to exit
+ *------------------------------------------------------------------------
+ */
+void	exit(void)
+{
+	kill(getpid());		/* Kill the current process */
+}
diff --git a/system/freebuf.c b/system/freebuf.c
new file mode 100644
index 0000000..44fd542
--- /dev/null
+++ b/system/freebuf.c
@@ -0,0 +1,39 @@
+/* freebuf.c - freebuf */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  freebuf  -  Free a buffer that was allocated from a pool by getbuf
+ *------------------------------------------------------------------------
+ */
+syscall	freebuf(
+	  char		*bufaddr	/* Address of buffer to return	*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	bpentry	*bpptr;		/* Pointer to entry in buftab	*/
+	bpid32	poolid;			/* ID of buffer's pool		*/
+
+	mask = disable();
+
+	/* Extract pool ID from integer prior to buffer address */
+
+	bufaddr -= sizeof(bpid32);
+	poolid = *(bpid32 *)bufaddr;
+	if (poolid < 0  ||  poolid >= nbpools) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	/* Get address of correct pool entry in table */
+
+	bpptr = &buftab[poolid];
+
+	/* Insert buffer into list and signal semaphore */
+
+	((struct bpentry *)bufaddr)->bpnext = bpptr->bpnext;
+	bpptr->bpnext = (struct bpentry *)bufaddr;
+	signal(bpptr->bpsem);
+	restore(mask);
+	return OK;
+}
diff --git a/system/freemem.c b/system/freemem.c
new file mode 100644
index 0000000..afd697a
--- /dev/null
+++ b/system/freemem.c
@@ -0,0 +1,70 @@
+/* freemem.c - freemem */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  freemem  -  Free a memory block, returning the block to the free list
+ *------------------------------------------------------------------------
+ */
+syscall	freemem(
+	  char		*blkaddr,	/* Pointer to memory block	*/
+	  uint32	nbytes		/* Size of block in bytes	*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	memblk	*next, *prev, *block;
+	uint32	top;
+
+	mask = disable();
+	if ((nbytes == 0) || ((uint32) blkaddr < (uint32) minheap)
+			  || ((uint32) blkaddr > (uint32) maxheap)) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	nbytes = (uint32) roundmb(nbytes);	/* Use memblk multiples	*/
+	block = (struct memblk *)blkaddr;
+
+	prev = &memlist;			/* Walk along free list	*/
+	next = memlist.mnext;
+	while ((next != NULL) && (next < block)) {
+		prev = next;
+		next = next->mnext;
+	}
+
+	if (prev == &memlist) {		/* Compute top of previous block*/
+		top = (uint32) NULL;
+	} else {
+		top = (uint32) prev + prev->mlength;
+	}
+
+	/* Ensure new block does not overlap previous or next blocks	*/
+
+	if (((prev != &memlist) && (uint32) block < top)
+	    || ((next != NULL)	&& (uint32) block+nbytes>(uint32)next)) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	memlist.mlength += nbytes;
+
+	/* Either coalesce with previous block or add to free list */
+
+	if (top == (uint32) block) { 	/* Coalesce with previous block	*/
+		prev->mlength += nbytes;
+		block = prev;
+	} else {			/* Link into list as new node	*/
+		block->mnext = next;
+		block->mlength = nbytes;
+		prev->mnext = block;
+	}
+
+	/* Coalesce with next block if adjacent */
+
+	if (((uint32) block + block->mlength) == (uint32) next) {
+		block->mlength += next->mlength;
+		block->mnext = next->mnext;
+	}
+	restore(mask);
+	return OK;
+}
diff --git a/system/getbuf.c b/system/getbuf.c
new file mode 100644
index 0000000..844f8da
--- /dev/null
+++ b/system/getbuf.c
@@ -0,0 +1,43 @@
+/* getbuf.c - getbuf */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  getbuf  -  Get a buffer from a preestablished buffer pool
+ *------------------------------------------------------------------------
+ */
+char    *getbuf(
+          bpid32        poolid          /* Index of pool in buftab	*/
+        )
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	bpentry	*bpptr;		/* Pointer to entry in buftab	*/
+	struct	bpentry	*bufptr;	/* Pointer to a buffer		*/
+
+	mask = disable();
+
+	/* Check arguments */
+
+	if ( (poolid < 0  ||  poolid >= nbpools) ) {
+		restore(mask);
+		return (char *)SYSERR;
+
+	}
+	bpptr = &buftab[poolid];
+
+	/* Wait for pool to have > 0 buffers and allocate a buffer */
+
+	wait(bpptr->bpsem);
+	bufptr = bpptr->bpnext;
+
+	/* Unlink buffer from pool */
+
+	bpptr->bpnext = bufptr->bpnext;
+
+	/* Record pool ID in first four bytes of buffer	and skip */
+
+	*(bpid32 *)bufptr = poolid;
+	bufptr = (struct bpentry *)(sizeof(bpid32) + (char *)bufptr);
+	restore(mask);
+	return (char *)bufptr;
+}
diff --git a/system/getc.c b/system/getc.c
new file mode 100644
index 0000000..bed57c3
--- /dev/null
+++ b/system/getc.c
@@ -0,0 +1,26 @@
+/* getc.c - getc */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  getc  -  Obtain one byte from a device
+ *------------------------------------------------------------------------
+ */
+syscall	getc(
+	  did32		descrp		/* Descriptor for device	*/
+	)
+{
+	intmask		mask;		/* Saved interrupt mask		*/
+	struct dentry	*devptr;	/* Entry in device switch table	*/
+	int32		retval;		/* Value to return to caller	*/
+
+	mask = disable();
+	if (isbaddev(descrp)) {
+		restore(mask);
+		return SYSERR;
+	}
+	devptr = (struct dentry *) &devtab[descrp];
+	retval = (*devptr->dvgetc) (devptr);
+	restore(mask);
+	return retval;
+}
diff --git a/system/getdev.c b/system/getdev.c
new file mode 100644
index 0000000..a92d8dc
--- /dev/null
+++ b/system/getdev.c
@@ -0,0 +1,26 @@
+/* getdev.c - getdev */
+
+#include <xinu.h>
+#include <string.h>
+
+/*------------------------------------------------------------------------
+ *  getdev  -  Convert a device name to a device ID
+ *------------------------------------------------------------------------
+ */
+did32	getdev(
+	  char		*devname	/* Name of the device		*/
+	)
+{
+	intmask		mask;		/* Saved interrupt mask		*/
+	did32		id;		/* Value to return to caller	*/
+
+	mask = disable();
+	for (id = 0; id < NDEVS; id++) {
+		if (strncmp(devname, devtab[id].dvname, DEVNAMLEN)) {
+			restore(mask);
+			return id;
+		}
+	}
+	restore(mask);
+	return (did32) SYSERR;
+}
diff --git a/system/getitem.c b/system/getitem.c
new file mode 100644
index 0000000..801f505
--- /dev/null
+++ b/system/getitem.c
@@ -0,0 +1,58 @@
+/* getitem.c - getfirst, getlast, getitem */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  getfirst  -  Remove a process from the front of a queue
+ *------------------------------------------------------------------------
+ */
+pid32	getfirst(
+	  qid16		q		/* ID of queue from which to	*/
+	)				/* Remove a process (assumed	*/
+					/*   valid with no check)	*/
+{
+	pid32	head;
+
+	if (isempty(q)) {
+		return EMPTY;
+	}
+
+	head = queuehead(q);
+	return getitem(queuetab[head].qnext);
+}
+
+/*------------------------------------------------------------------------
+ *  getlast  -  Remove a process from end of queue
+ *------------------------------------------------------------------------
+ */
+pid32	getlast(
+	  qid16		q		/* ID of queue from which to	*/
+	)				/* Remove a process (assumed	*/
+					/*   valid with no check)	*/
+{
+	pid32 tail;
+
+	if (isempty(q)) {
+		return EMPTY;
+	}
+
+	tail = queuetail(q);
+	return getitem(queuetab[tail].qprev);
+}
+
+/*------------------------------------------------------------------------
+ *  getitem  -  Remove a process from an arbitrary point in a queue
+ *------------------------------------------------------------------------
+ */
+pid32	getitem(
+	  pid32		pid		/* ID of process to remove	*/
+	)
+{
+	pid32	prev, next;
+
+	next = queuetab[pid].qnext;	/* Following node in list	*/
+	prev = queuetab[pid].qprev;	/* Previous node in list	*/
+	queuetab[prev].qnext = next;
+	queuetab[next].qprev = prev;
+	return pid;
+}
diff --git a/system/getmem.c b/system/getmem.c
new file mode 100644
index 0000000..dd0d593
--- /dev/null
+++ b/system/getmem.c
@@ -0,0 +1,50 @@
+/* getmem.c - getmem */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  getmem  -  Allocate heap storage, returning lowest word address
+ *------------------------------------------------------------------------
+ */
+char  	*getmem(
+	  uint32	nbytes		/* Size of memory requested	*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	memblk	*prev, *curr, *leftover;
+
+	mask = disable();
+	if (nbytes == 0) {
+		restore(mask);
+		return (char *)SYSERR;
+	}
+
+	nbytes = (uint32) roundmb(nbytes);	/* Use memblk multiples	*/
+
+	prev = &memlist;
+	curr = memlist.mnext;
+	while (curr != NULL) {			/* Search free list	*/
+
+		if (curr->mlength == nbytes) {	/* Block is exact match	*/
+			prev->mnext = curr->mnext;
+			memlist.mlength -= nbytes;
+			restore(mask);
+			return (char *)(curr);
+
+		} else if (curr->mlength > nbytes) { /* Split big block	*/
+			leftover = (struct memblk *)((uint32) curr +
+					nbytes);
+			prev->mnext = leftover;
+			leftover->mnext = curr->mnext;
+			leftover->mlength = curr->mlength - nbytes;
+			memlist.mlength -= nbytes;
+			restore(mask);
+			return (char *)(curr);
+		} else {			/* Move to next block	*/
+			prev = curr;
+			curr = curr->mnext;
+		}
+	}
+	restore(mask);
+	return (char *)SYSERR;
+}
diff --git a/system/getpid.c b/system/getpid.c
new file mode 100644
index 0000000..77a5ba9
--- /dev/null
+++ b/system/getpid.c
@@ -0,0 +1,12 @@
+/* getpid.c - getpid */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  getpid  -  Return the ID of the currently executing process
+ *------------------------------------------------------------------------
+ */
+pid32	getpid(void)
+{
+	return (currpid);
+}
diff --git a/system/getprio.c b/system/getprio.c
new file mode 100644
index 0000000..43f86af
--- /dev/null
+++ b/system/getprio.c
@@ -0,0 +1,24 @@
+/* getprio.c - getprio */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  getprio  -  Return the scheduling priority of a process
+ *------------------------------------------------------------------------
+ */
+syscall	getprio(
+	  pid32		pid		/* Process ID			*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	uint32	prio;			/* Priority to return		*/
+
+	mask = disable();
+	if (isbadpid(pid)) {
+		restore(mask);
+		return SYSERR;
+	}
+	prio = proctab[pid].prprio;
+	restore(mask);
+	return prio;
+}
diff --git a/system/getstk.c b/system/getstk.c
new file mode 100644
index 0000000..860416e
--- /dev/null
+++ b/system/getstk.c
@@ -0,0 +1,52 @@
+/* getstk.c - getstk */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  getstk  -  Allocate stack memory, returning highest word address
+ *------------------------------------------------------------------------
+ */
+char  	*getstk(
+	  uint32	nbytes		/* Size of memory requested	*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	memblk	*prev, *curr;	/* Walk through memory list	*/
+	struct	memblk	*fits, *fitsprev; /* Record block that fits	*/
+
+	mask = disable();
+	if (nbytes == 0) {
+		restore(mask);
+		return (char *)SYSERR;
+	}
+
+	nbytes = (uint32) roundmb(nbytes);	/* Use mblock multiples	*/
+
+	prev = &memlist;
+	curr = memlist.mnext;
+	fits = NULL;
+	fitsprev = NULL;  /* Just to avoid a compiler warning */
+
+	while (curr != NULL) {			/* Scan entire list	*/
+		if (curr->mlength >= nbytes) {	/* Record block address	*/
+			fits = curr;		/*   when request fits	*/
+			fitsprev = prev;
+		}
+		prev = curr;
+		curr = curr->mnext;
+	}
+
+	if (fits == NULL) {			/* No block was found	*/
+		restore(mask);
+		return (char *)SYSERR;
+	}
+	if (nbytes == fits->mlength) {		/* Block is exact match	*/
+		fitsprev->mnext = fits->mnext;
+	} else {				/* Remove top section	*/
+		fits->mlength -= nbytes;
+		fits = (struct memblk *)((uint32)fits + fits->mlength);
+	}
+	memlist.mlength -= nbytes;
+	restore(mask);
+	return (char *)((uint32) fits + nbytes - sizeof(uint32));
+}
diff --git a/system/getticks.c b/system/getticks.c
new file mode 100644
index 0000000..24ba759
--- /dev/null
+++ b/system/getticks.c
@@ -0,0 +1,14 @@
+/* getticks.c - getticks */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  getticks  -  Retrieve the number of clock ticks since CPU reset
+ *------------------------------------------------------------------------
+ */
+uint32  	getticks()
+{
+	/* Cortex M3 does have a clock cycle cnt register */
+	uint32 ret = 0;
+	return ret;
+}
diff --git a/system/gettime.c b/system/gettime.c
new file mode 100644
index 0000000..69fe09f
--- /dev/null
+++ b/system/gettime.c
@@ -0,0 +1,28 @@
+/* gettime.c - gettime */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  gettime  -  Get xinu time in seconds past Jan 1, 1970
+ *------------------------------------------------------------------------
+ */
+status	gettime(
+	  uint32  *timvar		/* Location to store the result	*/
+	)
+{
+	uint32	now;			/* Current time (UCT)		*/
+	int32	retval;			/* Return value from call	*/
+
+	/* Get current time in UCT representation (GMT) */
+
+	//retval = getutime(&now);
+	retval = SYSERR;
+	if (retval == SYSERR) {
+		return SYSERR;
+	}
+
+	/* Adjust to xinu time and store result */
+
+	*timvar = utim2ltim(now);
+	return OK;
+}
diff --git a/system/init.c b/system/init.c
new file mode 100644
index 0000000..535bdd3
--- /dev/null
+++ b/system/init.c
@@ -0,0 +1,26 @@
+/* init.c - init */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  init  -  Initialize a device and its driver
+ *------------------------------------------------------------------------
+ */
+syscall	init(
+	  did32		descrp		/* Descriptor for device	*/
+	)
+{
+	intmask		mask;		/* Saved interrupt mask		*/
+	struct dentry	*devptr;	/* Entry in device switch table	*/
+	int32		retval;		/* Value to return to caller	*/
+
+	mask = disable();
+	if (isbaddev(descrp)) {
+		restore(mask);
+		return SYSERR;
+	}
+	devptr = (struct dentry *) &devtab[descrp];
+	retval = (*devptr->dvinit) (devptr);
+	restore(mask);
+	return retval;
+}
diff --git a/system/initialize.c b/system/initialize.c
new file mode 100644
index 0000000..b5e7c9c
--- /dev/null
+++ b/system/initialize.c
@@ -0,0 +1,283 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+/* initialize.c - nulluser, sysinit */
+
+/* Handle system initialization and become the null process */
+
+#include <xinu.h>
+#include <string.h>
+
+//RAFA
+#include <serial_avr.h>
+
+
+extern	void	start(void);	/* Start of Xinu code			*/
+extern	void	*_end;		/* End of Xinu code			*/
+
+/* Function prototypes */
+
+extern	void main(void);	/* Main is the first process created	*/
+static	void sysinit(); 	/* Internal system initialization	*/
+extern	void meminit(void);	/* Initializes the free memory list	*/
+extern 	int32 initintc(void);
+void startup(int, struct procent *);		/* Process to finish startup tasks	*/
+
+/* Declarations of major kernel variables */
+
+struct	procent	proctab[NPROC];	/* Process table			*/
+struct	sentry	semtab[NSEM];	/* Semaphore table			*/
+struct	memblk	memlist;	/* List of free memory blocks		*/
+
+/* Active system status */
+
+int	prcount;		/* Total number of live processes	*/
+pid32	currpid;		/* ID of currently executing process	*/
+
+/* Control sequence to reset the console colors and cusor positiion	*/
+
+#define	CONSOLE_RESET	" \033[0m\033[2J\033[;H"
+
+/*------------------------------------------------------------------------
+ * nulluser - initialize the system and become the null process
+ *
+ * Note: execution begins here after the C run-time environment has been
+ * established.  Interrupts are initially DISABLED, and must eventually
+ * be enabled explicitly.  The code turns itself into the null process
+ * after initialization.  Because it must always remain ready to execute,
+ * the null process cannot execute code that might cause it to be
+ * suspended, wait for a semaphore, put to sleep, or exit.  In
+ * particular, the code must not perform I/O except for polled versions
+ * such as kprintf.
+ *------------------------------------------------------------------------
+ */
+
+// RAFA 
+// void PUT32 ( unsigned int, unsigned int );
+unsigned int GET32 ( unsigned int );
+void dummy ( unsigned int );
+
+#define GPIOCBASE 0x40011000
+#define RCCBASE 0x40021000
+
+void notmain ( void )
+{
+    unsigned int ra;
+    unsigned int rx;
+
+
+//    ra=GET32(RCCBASE+0x18);
+ //   ra|=1<<4; //enable port c
+  //  PUT32(RCCBASE+0x18,ra);
+    //config
+   // ra=GET32(GPIOCBASE+0x04);
+    //ra&=~(3<<20);   //PC13
+//    ra|=1<<20;      //PC13
+ //   ra&=~(3<<22);   //PC13
+  //  ra|=0<<22;      //PC13
+   // PUT32(GPIOCBASE+0x04,ra);
+
+//    for(rx=0;rx<10;rx++)
+ //   {
+  //      PUT32(GPIOCBASE+0x10,1<<(13+0));
+   //     for(ra=0;ra<200000;ra++) dummy(ra);
+    //    PUT32(GPIOCBASE+0x10,1<<(13+16));
+     //   for(ra=0;ra<200000;ra++) dummy(ra);
+   // }
+}
+
+// FIN RAFA
+
+
+void nullprocess(void) {
+
+	notmain();
+
+	
+	
+	resume(create((void *)main, INITSTK, INITPRIO, "Main Process", 0, NULL));
+	
+	for(;;);
+}
+
+
+//RAFA
+#include <avr/interrupt.h>
+
+char frase[] = "Xinu AVR loading...\n";
+void	nulluser()
+{	
+	struct	memblk	*memptr;	/* Ptr to memory block		*/
+	uint32	free_mem;		/* Total amount of free memory	*/
+
+	//RAFA
+	cli();
+	blink_avr();
+
+        // RAFA uartinit();
+        serial_init();
+        serial_put_char('A');
+        serial_put_char('B');
+	char f = serial_get_char();
+	int c = atoi(&f);
+        serial_put_char('X');
+        serial_put_char(frase[c]);
+
+	/* Initialize the system */
+
+	sysinit();
+
+	/* Output Xinu memory layout */
+	free_mem = 0;
+	for (memptr = memlist.mnext; memptr != NULL;
+						memptr = memptr->mnext) {
+		free_mem += memptr->mlength;
+	}
+	// RAFA kprintf("%10d bytes of free memory.  Free list:\n", free_mem);
+	for (memptr=memlist.mnext; memptr!=NULL;memptr = memptr->mnext) {
+	    kprintf("           [0x%08X to 0x%08X]\n",
+		(uint32)memptr, ((uint32)memptr) + memptr->mlength - 1);
+	}
+
+// RAFA 	kprintf("%10d bytes of Xinu code.\n",
+// RAFA 		(uint32)&etext - (uint32)&text);
+// RAFA 	kprintf("           [0x%08X to 0x%08X]\n",
+// RAFA 		(uint32)&text, (uint32)&etext - 1);
+// RAFA 	kprintf("%10d bytes of data.\n",
+// RAFA 		(uint32)&ebss - (uint32)&data);
+// RAFA 	kprintf("           [0x%08X to 0x%08X]\n\n",
+// RAFA 		(uint32)&data, (uint32)&ebss - 1);
+
+
+	/* Initialize the Null process entry */	
+	int pid = create((void *)nullprocess, INITSTK, 10, "Null process", 0, NULL);
+
+	struct procent * prptr = &proctab[pid];
+	prptr->prstate = PR_CURR;
+	
+	/* Enable interrupts */
+	enable();
+	
+	/* Initialize the real time clock */
+	clkinit();
+	
+	/* Start of nullprocess */
+	startup(0, prptr);
+
+	for(;;);
+
+}
+
+/* Startup does a system call, the processor switches to handler 
+ * mode and prepares for executing the null process (see syscall.c) 
+ * This is also where a kernel mode to user mode switch can
+ * take place */
+void startup(int INIT, struct procent *p) {
+	
+//	asm volatile (
+//	         "push {r0}" "\n\t"
+                 //"mov r0, 0x3" "\n\t"  // kernel to user mode switch 
+                 //"msr control, r0" "\n\t"  
+                 //"isb" "\n\t"
+  //               "pop {r0}" );
+ //       asm volatile("svc 1");
+
+	/* Should not be here, panic */
+	// RAFA panic("Can't startup system"); 
+	panic(&m6[0]); 
+}
+
+
+/*------------------------------------------------------------------------
+ *
+ * sysinit  -  Initialize all Xinu data structures and devices
+ *
+ *------------------------------------------------------------------------
+ */
+static	void	sysinit()
+{
+	int32	i;
+	struct	procent	*prptr;		/* Ptr to process table entry	*/
+	struct	sentry	*semptr;	/* Ptr to semaphore table entry	*/
+
+
+	/* Platform Specific Initialization */
+
+	platinit();
+
+	kprintf(CONSOLE_RESET);
+	kprintf("\n%s\n\n", VERSION);
+
+	/* Initialize free memory list */
+	
+	meminit();
+
+	/* Initialize system variables */
+
+	/* Count the Null process as the first process in the system */
+	prcount = 0;
+//	prcount = 1;
+
+	/* Scheduling is not currently blocked */
+
+	Defer.ndefers = 0;
+
+	/* Initialize process table entries free */
+
+	for (i = 0; i < NPROC; i++) {
+		prptr = &proctab[i];
+		prptr->prstate = PR_FREE;
+		prptr->prname[0] = NULLCH;
+		prptr->prstkbase = NULL;
+		prptr->prprio = 0;
+	}
+
+
+	/* Initialize semaphores */
+
+	for (i = 0; i < NSEM; i++) {
+		semptr = &semtab[i];
+		semptr->sstate = S_FREE;
+		semptr->scount = 0;
+		semptr->squeue = newqueue();
+	}
+
+	/* Initialize buffer pools */
+
+	bufinit();
+
+	/* Create a ready list for processes */
+
+	readylist = newqueue();
+
+	
+	for (i = 0; i < NDEVS; i++) {
+		init(i);
+	}
+	return;
+}
+
+int32	stop(char *s)
+{
+	kprintf("%s\n", s);
+//	kprintf("looping... press reset\n");
+	while(1)
+		/* Empty */;
+}
+
+int32	delay(int n)
+{
+	DELAY(n);
+	return OK;
+}
diff --git a/system/initialize.c.orig b/system/initialize.c.orig
new file mode 100644
index 0000000..d829707
--- /dev/null
+++ b/system/initialize.c.orig
@@ -0,0 +1,261 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+/* initialize.c - nulluser, sysinit */
+
+/* Handle system initialization and become the null process */
+
+#include <xinu.h>
+#include <string.h>
+
+extern	void	start(void);	/* Start of Xinu code			*/
+extern	void	*_end;		/* End of Xinu code			*/
+
+/* Function prototypes */
+
+extern	void main(void);	/* Main is the first process created	*/
+static	void sysinit(); 	/* Internal system initialization	*/
+extern	void meminit(void);	/* Initializes the free memory list	*/
+extern 	int32 initintc(void);
+void startup(int, struct procent *);		/* Process to finish startup tasks	*/
+
+/* Declarations of major kernel variables */
+
+struct	procent	proctab[NPROC];	/* Process table			*/
+struct	sentry	semtab[NSEM];	/* Semaphore table			*/
+struct	memblk	memlist;	/* List of free memory blocks		*/
+
+/* Active system status */
+
+int	prcount;		/* Total number of live processes	*/
+pid32	currpid;		/* ID of currently executing process	*/
+
+/* Control sequence to reset the console colors and cusor positiion	*/
+
+#define	CONSOLE_RESET	" \033[0m\033[2J\033[;H"
+
+/*------------------------------------------------------------------------
+ * nulluser - initialize the system and become the null process
+ *
+ * Note: execution begins here after the C run-time environment has been
+ * established.  Interrupts are initially DISABLED, and must eventually
+ * be enabled explicitly.  The code turns itself into the null process
+ * after initialization.  Because it must always remain ready to execute,
+ * the null process cannot execute code that might cause it to be
+ * suspended, wait for a semaphore, put to sleep, or exit.  In
+ * particular, the code must not perform I/O except for polled versions
+ * such as kprintf.
+ *------------------------------------------------------------------------
+ */
+
+// RAFA 
+// void PUT32 ( unsigned int, unsigned int );
+unsigned int GET32 ( unsigned int );
+void dummy ( unsigned int );
+
+#define GPIOCBASE 0x40011000
+#define RCCBASE 0x40021000
+
+void notmain ( void )
+{
+    unsigned int ra;
+    unsigned int rx;
+
+    ra=GET32(RCCBASE+0x18);
+    ra|=1<<4; //enable port c
+    PUT32(RCCBASE+0x18,ra);
+    //config
+    ra=GET32(GPIOCBASE+0x04);
+    ra&=~(3<<20);   //PC13
+    ra|=1<<20;      //PC13
+    ra&=~(3<<22);   //PC13
+    ra|=0<<22;      //PC13
+    PUT32(GPIOCBASE+0x04,ra);
+
+    for(rx=0;rx<10;rx++)
+    {
+        PUT32(GPIOCBASE+0x10,1<<(13+0));
+        for(ra=0;ra<200000;ra++) dummy(ra);
+        PUT32(GPIOCBASE+0x10,1<<(13+16));
+        for(ra=0;ra<200000;ra++) dummy(ra);
+    }
+}
+
+// FIN RAFA
+
+
+void nullprocess(void) {
+
+	notmain();
+
+	
+	
+	resume(create((void *)main, INITSTK, INITPRIO, "Main Process", 0, NULL));
+	
+	for(;;);
+}
+
+
+
+void	nulluser()
+{	
+	struct	memblk	*memptr;	/* Ptr to memory block		*/
+	uint32	free_mem;		/* Total amount of free memory	*/
+
+	/* Initialize the system */
+
+	sysinit();
+
+	/* Output Xinu memory layout */
+	free_mem = 0;
+	for (memptr = memlist.mnext; memptr != NULL;
+						memptr = memptr->mnext) {
+		free_mem += memptr->mlength;
+	}
+	kprintf("%10d bytes of free memory.  Free list:\n", free_mem);
+	for (memptr=memlist.mnext; memptr!=NULL;memptr = memptr->mnext) {
+	    kprintf("           [0x%08X to 0x%08X]\n",
+		(uint32)memptr, ((uint32)memptr) + memptr->mlength - 1);
+	}
+
+	kprintf("%10d bytes of Xinu code.\n",
+		(uint32)&etext - (uint32)&text);
+	kprintf("           [0x%08X to 0x%08X]\n",
+		(uint32)&text, (uint32)&etext - 1);
+	kprintf("%10d bytes of data.\n",
+		(uint32)&ebss - (uint32)&data);
+	kprintf("           [0x%08X to 0x%08X]\n\n",
+		(uint32)&data, (uint32)&ebss - 1);
+
+
+	/* Initialize the Null process entry */	
+	int pid = create((void *)nullprocess, INITSTK, 10, "Null process", 0, NULL);
+
+	struct procent * prptr = &proctab[pid];
+	prptr->prstate = PR_CURR;
+	
+	/* Enable interrupts */
+	enable();
+	
+	/* Initialize the real time clock */
+	clkinit();
+	
+	/* Start of nullprocess */
+	startup(0, prptr);
+
+	for(;;);
+
+}
+
+/* Startup does a system call, the processor switches to handler 
+ * mode and prepares for executing the null process (see syscall.c) 
+ * This is also where a kernel mode to user mode switch can
+ * take place */
+void startup(int INIT, struct procent *p) {
+	
+	asm volatile (
+	         "push {r0}" "\n\t"
+                 //"mov r0, 0x3" "\n\t"  // kernel to user mode switch 
+                 //"msr control, r0" "\n\t"  
+                 //"isb" "\n\t"
+                 "pop {r0}" );
+        asm volatile("svc 1");
+
+	/* Should not be here, panic */
+	panic("Can't startup system"); 
+}
+
+
+/*------------------------------------------------------------------------
+ *
+ * sysinit  -  Initialize all Xinu data structures and devices
+ *
+ *------------------------------------------------------------------------
+ */
+static	void	sysinit()
+{
+	int32	i;
+	struct	procent	*prptr;		/* Ptr to process table entry	*/
+	struct	sentry	*semptr;	/* Ptr to semaphore table entry	*/
+
+
+	/* Platform Specific Initialization */
+
+	platinit();
+
+	kprintf(CONSOLE_RESET);
+	kprintf("\n%s\n\n", VERSION);
+
+	/* Initialize free memory list */
+	
+	meminit();
+
+	/* Initialize system variables */
+
+	/* Count the Null process as the first process in the system */
+	prcount = 0;
+//	prcount = 1;
+
+	/* Scheduling is not currently blocked */
+
+	Defer.ndefers = 0;
+
+	/* Initialize process table entries free */
+
+	for (i = 0; i < NPROC; i++) {
+		prptr = &proctab[i];
+		prptr->prstate = PR_FREE;
+		prptr->prname[0] = NULLCH;
+		prptr->prstkbase = NULL;
+		prptr->prprio = 0;
+	}
+
+
+	/* Initialize semaphores */
+
+	for (i = 0; i < NSEM; i++) {
+		semptr = &semtab[i];
+		semptr->sstate = S_FREE;
+		semptr->scount = 0;
+		semptr->squeue = newqueue();
+	}
+
+	/* Initialize buffer pools */
+
+	bufinit();
+
+	/* Create a ready list for processes */
+
+	readylist = newqueue();
+
+	
+	for (i = 0; i < NDEVS; i++) {
+		init(i);
+	}
+	return;
+}
+
+int32	stop(char *s)
+{
+	kprintf("%s\n", s);
+	kprintf("looping... press reset\n");
+	while(1)
+		/* Empty */;
+}
+
+int32	delay(int n)
+{
+	DELAY(n);
+	return OK;
+}
diff --git a/system/insert.c b/system/insert.c
new file mode 100644
index 0000000..ecf4274
--- /dev/null
+++ b/system/insert.c
@@ -0,0 +1,36 @@
+/* insert.c - insert */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  insert  -  Insert a process into a queue in descending key order
+ *------------------------------------------------------------------------
+ */
+status	insert(
+	  pid32		pid,		/* ID of process to insert	*/
+	  qid16		q,		/* ID of queue to use		*/
+	  int32		key		/* Key for the inserted process	*/
+	)
+{
+	qid16	curr;			/* Runs through items in a queue*/
+	qid16	prev;			/* Holds previous node index	*/
+
+	if (isbadqid(q) || isbadpid(pid)) {
+		return SYSERR;
+	}
+
+	curr = firstid(q);
+	while (queuetab[curr].qkey >= key) {
+		curr = queuetab[curr].qnext;
+	}
+
+	/* Insert process between curr node and previous node */
+
+	prev = queuetab[curr].qprev;	/* Get index of previous node	*/
+	queuetab[pid].qnext = curr;
+	queuetab[pid].qprev = prev;
+	queuetab[pid].qkey = key;
+	queuetab[prev].qnext = pid;
+	queuetab[curr].qprev = pid;
+	return OK;
+}
diff --git a/system/insertd.c b/system/insertd.c
new file mode 100644
index 0000000..8f5e700
--- /dev/null
+++ b/system/insertd.c
@@ -0,0 +1,42 @@
+/* insertd.c - insertd */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  insertd  -  Insert a process in delta list using delay as the key
+ *------------------------------------------------------------------------
+ */
+status	insertd(			/* Assumes interrupts disabled	*/
+	  pid32		pid,		/* ID of process to insert	*/
+	  qid16		q,		/* ID of queue to use		*/
+	  int32		key		/* Delay from "now" (in ms.)	*/
+	)
+{
+	int32	next;			/* Runs through the delta list	*/
+	int32	prev;			/* Follows next through the list*/
+
+	if (isbadqid(q) || isbadpid(pid)) {
+		return SYSERR;
+	}
+
+	prev = queuehead(q);
+	next = queuetab[queuehead(q)].qnext;
+	while ((next != queuetail(q)) && (queuetab[next].qkey <= key)) {
+		key -= queuetab[next].qkey;
+		prev = next;
+		next = queuetab[next].qnext;
+	}
+
+	/* Insert new node between prev and next nodes */
+
+	queuetab[pid].qnext = next;
+	queuetab[pid].qprev = prev;
+	queuetab[pid].qkey = key;
+	queuetab[prev].qnext = pid;
+	queuetab[next].qprev = pid;
+	if (next != queuetail(q)) {
+		queuetab[next].qkey -= key;
+	}
+
+	return OK;
+}
diff --git a/system/intr.S b/system/intr.S
new file mode 100644
index 0000000..2ba3f8d
--- /dev/null
+++ b/system/intr.S
@@ -0,0 +1,60 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+/* intr.S - enable, disable, restore, halt, pause, (ARM) */
+
+#include <cortexm3.h>
+
+	.text
+	.globl	disable
+	.globl	restore
+	.globl	enable
+	.globl	pause
+	.globl	halt
+
+/*------------------------------------------------------------------------
+ * disable  -  Disable interrupts and return the previous state
+ *------------------------------------------------------------------------
+ */
+disable:
+//	mrs	r0, psr		/* Copy the CPSR into r0		*/
+//	cpsid	i		/* Disable interrupts			*/
+//	bx	lr		/* Return the CPSR			*/
+
+/*------------------------------------------------------------------------
+ * restore  -  Restore interrupts to value given by mask argument
+   Cortex M3 hardware handles a lot, rewrite
+ *------------------------------------------------------------------------
+ */
+restore:
+//	msr	psr_nzcvq, r0	/* Restore the CPSR			*/
+//	cpsie	i		
+//	bx 	lr		/* Return to caller			*/
+
+/*------------------------------------------------------------------------
+ * enable  -  Enable interrupts
+ *------------------------------------------------------------------------
+ */
+enable:
+//	cpsie	i		/* Enable interrupts			*/
+//	bx	lr		/* Return				*/
+
+/*------------------------------------------------------------------------
+ * pause or halt  -  Place the processor in a hard loop
+ *------------------------------------------------------------------------
+ */
+halt:
+pause:
+//	cpsid	i		/* Disable interrupts		*/
+//dloop:	b	dloop		/* Dead loop			*/
diff --git a/system/intr.S.orig b/system/intr.S.orig
new file mode 100644
index 0000000..7b06e1d
--- /dev/null
+++ b/system/intr.S.orig
@@ -0,0 +1,60 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+/* intr.S - enable, disable, restore, halt, pause, (ARM) */
+
+#include <cortexm3.h>
+
+	.text
+	.globl	disable
+	.globl	restore
+	.globl	enable
+	.globl	pause
+	.globl	halt
+
+/*------------------------------------------------------------------------
+ * disable  -  Disable interrupts and return the previous state
+ *------------------------------------------------------------------------
+ */
+disable:
+	mrs	r0, psr		/* Copy the CPSR into r0		*/
+	cpsid	i		/* Disable interrupts			*/
+	bx	lr		/* Return the CPSR			*/
+
+/*------------------------------------------------------------------------
+ * restore  -  Restore interrupts to value given by mask argument
+   Cortex M3 hardware handles a lot, rewrite
+ *------------------------------------------------------------------------
+ */
+restore:
+	msr	psr_nzcvq, r0	/* Restore the CPSR			*/
+	cpsie	i		
+	bx 	lr		/* Return to caller			*/
+
+/*------------------------------------------------------------------------
+ * enable  -  Enable interrupts
+ *------------------------------------------------------------------------
+ */
+enable:
+	cpsie	i		/* Enable interrupts			*/
+	bx	lr		/* Return				*/
+
+/*------------------------------------------------------------------------
+ * pause or halt  -  Place the processor in a hard loop
+ *------------------------------------------------------------------------
+ */
+halt:
+pause:
+	cpsid	i		/* Disable interrupts		*/
+dloop:	b	dloop		/* Dead loop			*/
diff --git a/system/ioerr.c b/system/ioerr.c
new file mode 100644
index 0000000..4bbfbef
--- /dev/null
+++ b/system/ioerr.c
@@ -0,0 +1,12 @@
+/* ioerr.c - ioerr */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ioerr  -  Return an error status (used for "error" entries in devtab)
+ *------------------------------------------------------------------------
+ */
+devcall	ioerr(void)
+{
+	return SYSERR;
+}
diff --git a/system/ionull.c b/system/ionull.c
new file mode 100644
index 0000000..ea67864
--- /dev/null
+++ b/system/ionull.c
@@ -0,0 +1,12 @@
+/* ionull.c - ionull */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ionull  -  Do nothing (used for "don't care" entries in devtab)
+ *------------------------------------------------------------------------
+ */
+devcall	ionull(void)
+{
+	return OK;
+}
diff --git a/system/kill.c b/system/kill.c
new file mode 100644
index 0000000..d0b711e
--- /dev/null
+++ b/system/kill.c
@@ -0,0 +1,59 @@
+/* kill.c - kill */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  kill  -  Kill a process and remove it from the system
+ *------------------------------------------------------------------------
+ */
+syscall	kill(
+	  pid32		pid		/* ID of process to kill	*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	procent *prptr;		/* Ptr to process's table entry	*/
+	int32	i;			/* Index into descriptors	*/
+
+	mask = disable();
+	if (isbadpid(pid) || (pid == NULLPROC)
+	    || ((prptr = &proctab[pid])->prstate) == PR_FREE) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	if (--prcount <= 1) {		/* Last user process completes	*/
+		xdone();
+	}
+
+	send(prptr->prparent, pid);
+	for (i=0; i<3; i++) {
+		close(prptr->prdesc[i]);
+	}
+	freestk(prptr->prstkbase, prptr->prstklen);
+
+	switch (prptr->prstate) {
+	case PR_CURR:
+		prptr->prstate = PR_FREE;	/* Suicide */
+		*SCB_ICSR |= (1 << PENDSV_INTR);
+
+	case PR_SLEEP:
+	case PR_RECTIM:
+		unsleep(pid);
+		prptr->prstate = PR_FREE;
+		break;
+
+	case PR_WAIT:
+		semtab[prptr->prsem].scount++;
+		/* Fall through */
+
+	case PR_READY:
+		getitem(pid);		/* Remove from queue */
+		/* Fall through */
+
+	default:
+		prptr->prstate = PR_FREE;
+	}
+
+	restore(mask);
+	return OK;
+}
diff --git a/system/kprintf.c b/system/kprintf.c
new file mode 100644
index 0000000..f10b8e9
--- /dev/null
+++ b/system/kprintf.c
@@ -0,0 +1,57 @@
+/* kprintf.c -  kputc, kgetc, kprintf */
+/* Kprintf uses a direct method to write to serial
+ * Used for debugging purposes. Should in normal cases
+ * use printf that does a syscall
+ * */
+
+#include <xinu.h>
+#include <stdarg.h>
+
+/*------------------------------------------------------------------------
+ * kputc - use polled I/O to write a character to the console serial line
+ *------------------------------------------------------------------------
+ */
+syscall kputc(
+	  byte	c			/* character to write		*/
+	)
+{
+	intmask mask;
+	volatile struct uart_csreg * uptr = 0x40013800;
+
+	mask = disable();
+
+	if (c == '\n') {
+              while(!(uptr->sr & UART_TC));
+	      uptr->dr = 0x0D; // return line
+      	}
+              while(!(uptr->sr & UART_TC));
+	      uptr->dr = c;
+
+	restore(mask);
+	return OK;
+}
+
+/*------------------------------------------------------------------------
+ * kgetc - use polled I/O to read a character from the console serial line
+ *------------------------------------------------------------------------
+ */
+syscall kgetc(void)
+{
+	// Not used
+}
+
+extern	void	_doprnt(char *, va_list, int (*)(int));
+
+/*------------------------------------------------------------------------
+ * kprintf  -  use polled I/O to print formatted output on the console
+ *------------------------------------------------------------------------
+ */
+syscall kprintf(char *fmt, ...)
+{
+    va_list ap;
+
+    va_start(ap, fmt);
+    _doprnt(fmt, ap, (int (*)(int))kputc);
+    va_end(ap);
+    return OK;
+}
diff --git a/system/main.c b/system/main.c
new file mode 100644
index 0000000..a3f8ff3
--- /dev/null
+++ b/system/main.c
@@ -0,0 +1,31 @@
+/*  main.c  - main */
+// This is user land
+
+#include <xinu.h>
+
+extern void notmain(void);
+
+process	main(void)
+{
+	//RAFA
+	notmain();
+
+	/* Run the Xinu shell */
+	recvclr();
+
+	
+	resume(create(shell, 4096, 50, "shell", 1, 0));
+	
+	/* Wait for shell to exit and recreate it */
+
+	while (TRUE) {
+		receive();
+		//kprintf("Entering sleep");
+		sleepms(200);
+		// RAFA kprintf("\n\nMain process recreating shell\n\n");
+		kprintf(&m1[0]);
+		resume(create(shell, 4096, 20, "shell", 1, CONSOLE));
+	}
+	return OK;
+    
+}
diff --git a/system/mark.c b/system/mark.c
new file mode 100644
index 0000000..f20a304
--- /dev/null
+++ b/system/mark.c
@@ -0,0 +1,47 @@
+/* mark.c - markinit, mark */
+
+#include <xinu.h>
+
+int32	*marks[MAXMARK];		/* Pointers to marked locations	*/
+int32	nmarks;				/* Number of marked locations	*/
+sid32	mkmutex;			/* Mutual exclusion semaphore	*/
+
+/*------------------------------------------------------------------------
+ *  markinit  -  Called once at system startup
+ *------------------------------------------------------------------------
+ */
+void	markinit(void)
+{
+	nmarks = 0;
+	mkmutex = semcreate(1);
+}
+
+
+/*------------------------------------------------------------------------
+ *  mark  -  Mark a specified memory location
+ *------------------------------------------------------------------------
+ */
+status	mark(
+	  int32	*loc			/* Location to mark		*/
+	)
+{
+
+	/* If location is already marked, do nothing */
+
+	if ( (*loc>=0) && (*loc<nmarks) && (marks[*loc]==loc) ) {
+		return OK;
+	}
+
+	/* If no more memory marks are available, indicate an error */
+
+	if (nmarks >= MAXMARK) {
+		return SYSERR;
+	}
+
+	/* Obtain exclusive access and mark the specified location */
+
+	wait(mkmutex);
+	marks[ (*loc) = nmarks++ ] = loc;
+	signal(mkmutex);
+	return OK;
+}
diff --git a/system/meminit.c b/system/meminit.c
new file mode 100644
index 0000000..3fbecd8
--- /dev/null
+++ b/system/meminit.c
@@ -0,0 +1,39 @@
+/* meminit.c - meminit */
+
+#include <xinu.h>
+
+void	*minheap;	/* Start address of heap	*/
+void	*maxheap;	/* End address of heap		*/
+
+/*------------------------------------------------------------------------
+ * meminit - Initialize the free memory list for BeagleBone Black
+ *------------------------------------------------------------------------
+ */
+
+//RAFA AGREGO ESTO
+extern int __bss_end;
+
+
+
+void	meminit(void)
+{
+	struct	memblk *memptr;	/* Memory block pointer	*/
+
+	/* Initialize the minheap and maxheap variables */
+
+	//RAFA AGREGO ESTO
+	int end = __bss_end + 1;
+
+	minheap = (void *)&end;
+	/* 1024 bytes is reserved for supervise mode handling */
+	maxheap = (void *)MAXADDR - HANDLERSTACK;
+
+	/* Initialize the memory list as one big block */
+
+	memlist.mnext = (struct memblk *)minheap;
+	memptr = memlist.mnext;
+
+	memptr->mnext = (struct memblk *)NULL;
+	memlist.mlength = memptr->mlength =
+		(uint32)maxheap - (uint32)minheap;
+}
diff --git a/system/mkbufpool.c b/system/mkbufpool.c
new file mode 100644
index 0000000..9191b62
--- /dev/null
+++ b/system/mkbufpool.c
@@ -0,0 +1,55 @@
+/* mkbufpool.c - mkbufpool */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  mkbufpool  -  Allocate memory for a buffer pool and link the buffers
+ *------------------------------------------------------------------------
+ */
+bpid32	mkbufpool(
+	  int32		bufsiz,		/* Size of a buffer in the pool	*/
+	  int32		numbufs		/* Number of buffers in the pool*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	bpid32	poolid;			/* ID of pool that is created	*/
+	struct	bpentry	*bpptr;		/* Pointer to entry in buftab	*/
+	char	*buf;			/* Pointer to memory for buffer	*/
+
+	mask = disable();
+	if (bufsiz<BP_MINB || bufsiz>BP_MAXB
+	    || numbufs<1 || numbufs>BP_MAXN
+	    || nbpools >= NBPOOLS) {
+		restore(mask);
+		return (bpid32)SYSERR;
+	}
+	/* Round request to a multiple of 4 bytes */
+
+	bufsiz = ( (bufsiz + 3) & (~3) );
+
+	buf = (char *)getmem( numbufs * (bufsiz+sizeof(bpid32)) );
+	if ((int32)buf == SYSERR) {
+		restore(mask);
+		return (bpid32)SYSERR;
+	}
+	poolid = nbpools++;
+	bpptr = &buftab[poolid];
+	bpptr->bpnext = (struct bpentry *)buf;
+	bpptr->bpsize = bufsiz;
+	if ( (bpptr->bpsem = semcreate(numbufs)) == SYSERR) {
+		freemem(buf, numbufs * (bufsiz+sizeof(bpid32)) );
+		nbpools--;
+		restore(mask);
+		return (bpid32)SYSERR;
+	}
+	bufsiz+=sizeof(bpid32);
+	for (numbufs-- ; numbufs>0 ; numbufs-- ) {
+		bpptr = (struct bpentry *)buf;
+		buf += bufsiz;
+		bpptr->bpnext = (struct bpentry *)buf;
+	}
+	bpptr = (struct bpentry *)buf;
+	bpptr->bpnext = (struct bpentry *)NULL;
+	restore(mask);
+	return poolid;
+}
diff --git a/system/newqueue.c b/system/newqueue.c
new file mode 100644
index 0000000..3a0a530
--- /dev/null
+++ b/system/newqueue.c
@@ -0,0 +1,30 @@
+/* newqueue.c - newqueue */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  newqueue  -  Allocate and initialize a queue in the global queue table
+ *------------------------------------------------------------------------
+ */
+qid16	newqueue(void)
+{
+	static qid16	nextqid=NPROC;	/* Next list in queuetab to use	*/
+	qid16		q;		/* ID of allocated queue 	*/
+
+	q = nextqid;
+	if (q >= NQENT) {		/* Check for table overflow	*/
+		return SYSERR;
+	}
+
+	nextqid += 2;			/* Increment index for next call*/
+
+	/* Initialize head and tail nodes to form an empty queue */
+
+	queuetab[queuehead(q)].qnext = queuetail(q);
+	queuetab[queuehead(q)].qprev = EMPTY;
+	queuetab[queuehead(q)].qkey  = MAXKEY;
+	queuetab[queuetail(q)].qnext = EMPTY;
+	queuetab[queuetail(q)].qprev = queuehead(q);
+	queuetab[queuetail(q)].qkey  = MINKEY;
+	return q;
+}
diff --git a/system/open.c b/system/open.c
new file mode 100644
index 0000000..c4827fe
--- /dev/null
+++ b/system/open.c
@@ -0,0 +1,41 @@
+/* open.c - open */
+
+#include <xinu.h>
+
+//RAFA 
+typedef unsigned int size_t;
+#include <avr/pgmspace.h>
+typedef void (*fn_ptr) (void);
+
+
+/*------------------------------------------------------------------------
+ *  open  -  Open a device (some devices ignore name and mode parameters)
+ *------------------------------------------------------------------------
+ */
+syscall	open(
+	  did32		descrp,		/* Descriptor for device	*/
+	  char		*name,		/* Name to use, if any		*/
+	  char		*mode		/* Mode for device, if any	*/
+	)
+{
+	intmask		mask;		/* Saved interrupt mask		*/
+	struct dentry	*devptr;	/* Entry in device switch table	*/
+	int32		retval;		/* Value to return to caller	*/
+
+	mask = disable();
+	if (isbaddev(descrp)) {
+		restore(mask);
+		return SYSERR;
+	}
+	devptr = (struct dentry *) &devtab[descrp];
+	retval = (*devptr->dvopen) (devptr, name, mode);
+	// devcall * f = (devcall *) pgm_read_word(&devtab[descrp].dvopen);
+	// (f) (devptr, name, mode);
+	// devptr = (struct dentry *) pgm_read_word(&devtab[descrp]);
+	//retval = (*fn_ptr) (pgm_read_word(*devptr->dvopen)) (devptr, name, mode);
+	// retval = (fn_ptr pgm_read_word(&devtab[descrp].dvopen)) (devptr, name, mode);
+	// retval = (fn_ptr pgm_read_word(*devptr->dvopen) (devptr, name, mode);
+
+	restore(mask);
+	return retval;
+}
diff --git a/system/panic.c b/system/panic.c
new file mode 100644
index 0000000..830b51f
--- /dev/null
+++ b/system/panic.c
@@ -0,0 +1,16 @@
+/* panic.c - panic */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * panic  -  Display a message and stop all processing
+ *------------------------------------------------------------------------
+ */
+void	panic (
+	 char	*msg			/* Message to display		*/
+	)
+{
+	disable();			/* Disable interrupts		*/
+	kprintf("\n\n\rpanic: %s\n\n", msg);
+	while(TRUE) {;}			/* Busy loop forever		*/
+}
diff --git a/system/platinit.c b/system/platinit.c
new file mode 100644
index 0000000..0dbce0b
--- /dev/null
+++ b/system/platinit.c
@@ -0,0 +1,85 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+/* platinit.c - platinit */
+
+#include <xinu.h>
+
+//RAFA
+#include <serial_avr.h>
+
+
+void uartinit();
+
+
+/*------------------------------------------------------------------------
+ * platinit - platform specific initialization
+ *------------------------------------------------------------------------
+ */
+
+// RAFA puso lo siguiente
+// extern int _edata;
+// extern int __data_start;
+// extern int _etext;
+
+void platinit(void)
+{
+	/* Load .data segment into SRAM */
+	// extern uint32 * etext, data, edata;
+	// int size = (&edata - &data); 
+	// memcpy(&data, &etext, size);	
+
+	/* Initialize UART Serial communication */
+	// RAFA uartinit();
+	// serial_init();
+	// serial_put_char('A');
+	// serial_put_char('B');
+	// serial_put_str("Xinu AVR loading...\n");
+	
+	/* Initialize the Interrupt Controller (evec.c) */
+	initintc();
+
+	/* System calls */
+	syscall_init();
+}
+
+/* Simple UART initialization, not using a TTY device
+Used by kprintf and early system debugging */
+
+void uartinit()
+{
+	
+	struct	uart_csreg *uptr;	/* Address of UART's CSRs */
+	struct 	gpio_csreg *gptr;	
+	struct 	clock_csreg *cptr;
+
+	/* Enable 'clock' on peripherals */
+	cptr = (struct clock_csreg *)CLOCK_BASE;
+	cptr->apb2enr |= (1 << IOPAEN) | (1 << USART1EN);
+
+	/* Set in and output mode (dirty) */
+	gptr = (struct gpio_csreg *)(0x40010800);
+	gptr->crh = 0x44444894;
+
+	/* Enable peripheral */
+	uptr = (struct uart_csreg *)(0x40013800);
+	uptr->cr1 &= ~(1 << UART_EN);
+	
+	/* Set baudrate 115200 */
+	uptr->brr = 0x00000045;
+	
+	uptr->cr1 |= (1 << UART_INTR_RX) | (1 << UART_TX_EN) | (1 << UART_RX_EN);
+	uptr->cr1 |= (1 << UART_EN);
+	
+}
diff --git a/system/ptclear.c b/system/ptclear.c
new file mode 100644
index 0000000..8ea1384
--- /dev/null
+++ b/system/ptclear.c
@@ -0,0 +1,50 @@
+/* ptclear.c - _ptclear */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  _ptclear  -  Used by ptdelete and ptreset to clear or reset a port
+ *		   (internal function assumes interrupts disabled and
+ *		   arguments have been checked for validity)
+ *------------------------------------------------------------------------
+ */
+void	_ptclear(
+	  struct ptentry *ptptr,	/* Table entry to clear		*/
+	  uint16       newstate,	/* New state for port		*/
+	  int32        (*dispose)(int32)/* Disposal function to call	*/
+	 )
+{
+	struct	ptnode	*walk;		/* Pointer to walk message list	*/
+
+	/* Place port in limbo state while waiting processes are freed */
+
+	ptptr->ptstate = PT_LIMBO;
+
+	ptptr->ptseq++;			/* Reset accession number	*/
+	walk = ptptr->pthead;		/* First item on msg list	*/
+
+	if ( walk != NULL ) {		/* If message list nonempty	*/
+
+		/* Walk message list and dispose of each message */
+
+		for( ; walk!=NULL ; walk=walk->ptnext) {
+                        (*dispose)( walk->ptmsg );
+		}
+
+		/* Link entire message list into the free list */
+
+                (ptptr->pttail)->ptnext = ptfree;
+                ptfree = ptptr->pthead;
+        }
+
+	if (newstate == PT_ALLOC) {
+		ptptr->pttail = ptptr->pthead = NULL;
+		semreset(ptptr->ptssem, ptptr->ptmaxcnt);
+		semreset(ptptr->ptrsem, 0);
+	} else {
+		semdelete(ptptr->ptssem);
+		semdelete(ptptr->ptrsem);
+	}
+	ptptr->ptstate = newstate;
+	return;
+}
diff --git a/system/ptcount.c b/system/ptcount.c
new file mode 100644
index 0000000..12076a4
--- /dev/null
+++ b/system/ptcount.c
@@ -0,0 +1,44 @@
+/* ptcount.c - ptcount */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ptcount  -  Return the count of messages currently waiting in a port
+ *		  (a non-negative count K means the port contains K
+ *		   K messages,  including messages from senders that
+ *		   are blocked waiting to send a message; a count of
+ *		   negative K means a port is empty and K processes
+ *		   are blocked waiting to receive a message)
+ *------------------------------------------------------------------------
+ */
+int32	ptcount(
+	  int32		portid		/* ID of a port to use		*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	int32	count;			/* Count of messages available	*/
+	int32	sndcnt;			/* Count of sender semaphore	*/
+	struct	ptentry	*ptptr;		/* Pointer to port table entry	*/
+
+	mask = disable();
+	if ( isbadport(portid) ||
+		(ptptr= &porttab[portid])->ptstate != PT_ALLOC ) {
+			restore(mask);
+			return SYSERR;
+	}
+
+	/* Get count of messages available */
+
+	count = semcount(ptptr->ptrsem);
+
+	/* If messages are waiting, check for blocked senders */
+
+	if (count >= 0) {
+		sndcnt = semcount(ptptr->ptssem);
+		if (sndcnt < 0) {	/* -sndcnt senders blocked */
+			count += -sndcnt;
+		}
+	}
+	restore(mask);
+	return count;
+}
diff --git a/system/ptcreate.c b/system/ptcreate.c
new file mode 100644
index 0000000..c020876
--- /dev/null
+++ b/system/ptcreate.c
@@ -0,0 +1,46 @@
+/* ptcreate.c - ptcreate */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ptcreate  -  Create a port that allows "count" outstanding messages
+ *------------------------------------------------------------------------
+ */
+syscall	ptcreate(
+	  int32		count		/* Size of port			*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	int32	i;			/* Counts all possible ports	*/
+	int32	ptnum;			/* Candidate port number to try	*/
+	struct	ptentry	*ptptr;		/* Pointer to port table entry	*/
+
+	mask = disable();
+	if (count < 0) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	for (i=0 ; i<NPORTS ; i++) {	/* Count all table entries	*/
+		ptnum = ptnextid;	/* Get an entry to check	*/
+		if (++ptnextid >= NPORTS) {
+			ptnextid = 0;	/* Reset for next iteration	*/
+		}
+
+		/* Check table entry that corresponds to ID ptnum */
+
+		ptptr= &porttab[ptnum];
+		if (ptptr->ptstate == PT_FREE) {
+			ptptr->ptstate = PT_ALLOC;
+			ptptr->ptssem = semcreate(count);
+			ptptr->ptrsem = semcreate(0);
+			ptptr->pthead = ptptr->pttail = NULL;
+			ptptr->ptseq++;
+			ptptr->ptmaxcnt = count;
+			restore(mask);
+			return ptnum;
+		}
+	}
+	restore(mask);
+	return SYSERR;
+}
diff --git a/system/ptdelete.c b/system/ptdelete.c
new file mode 100644
index 0000000..4fc51d2
--- /dev/null
+++ b/system/ptdelete.c
@@ -0,0 +1,27 @@
+/* ptdelete.c - ptdelete */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ptdelete  -  Delete a port, freeing waiting processes and messages
+ *------------------------------------------------------------------------
+ */
+syscall	ptdelete(
+	  int32		portid,		/* ID of port to delete		*/
+	  int32		(*disp)(int32)	/* Function to call to dispose	*/
+	)				/*    of waiting messages	*/
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	ptentry	*ptptr;		/* Pointer to port table entry	*/
+
+	mask = disable();
+	if ( isbadport(portid) ||
+	     (ptptr= &porttab[portid])->ptstate != PT_ALLOC ) {
+		restore(mask);
+		return SYSERR;
+	}
+	_ptclear(ptptr, PT_FREE, disp);
+	ptnextid = portid;
+	restore(mask);
+	return OK;
+}
diff --git a/system/ptinit.c b/system/ptinit.c
new file mode 100644
index 0000000..a6af980
--- /dev/null
+++ b/system/ptinit.c
@@ -0,0 +1,45 @@
+/* ptinit.c - ptinit */
+
+#include <xinu.h>
+
+struct	ptnode	*ptfree;		/* List of free message nodes	*/
+struct	ptentry	porttab[NPORTS];	/* Port table			*/
+int32	ptnextid;			/* Next table entry to try	*/
+
+/*------------------------------------------------------------------------
+ *  ptinit  -  Initialize all ports
+ *------------------------------------------------------------------------
+ */
+syscall	ptinit(
+	  int32	maxmsgs			/* Total messages in all ports	*/
+	)
+{
+	int32	i;			/* Runs through the port table	*/
+	struct	ptnode	*next, *curr;	/* Used to build a free list	*/
+
+	/* Allocate memory for all messages on all ports */
+
+	ptfree = (struct ptnode *)getmem(maxmsgs*sizeof(struct ptnode));
+	if (ptfree == (struct ptnode *)SYSERR) {
+		panic("ptinit - insufficient memory");
+	}
+
+	/* Initialize all port table entries to free */
+
+	for (i=0 ; i<NPORTS ; i++) {
+		porttab[i].ptstate = PT_FREE;
+		porttab[i].ptseq = 0;
+	}
+	ptnextid = 0;
+
+	/* Create a free list of message nodes linked together */
+
+	for ( curr=next=ptfree ;  --maxmsgs > 0  ; curr=next ) {
+		curr->ptnext = ++next;
+	}
+
+	/* Set the pointer in the final node to NULL */
+
+	curr->ptnext = NULL;
+	return OK;
+}
diff --git a/system/ptrecv.c b/system/ptrecv.c
new file mode 100644
index 0000000..bcfc9b2
--- /dev/null
+++ b/system/ptrecv.c
@@ -0,0 +1,48 @@
+/* ptrecv.c - ptrecv */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ptrecv  -  Receive a message from a port, blocking if port empty
+ *------------------------------------------------------------------------
+ */
+uint32	ptrecv(
+	  int32		portid		/* ID of port to use		*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	ptentry	*ptptr;		/* Pointer to table entry	*/
+	int32	seq;			/* Local copy of sequence num.	*/
+	umsg32	msg;			/* Message to return		*/
+	struct	ptnode	*msgnode;	/* First node on message list	*/
+
+	mask = disable();
+	if ( isbadport(portid) ||
+	     (ptptr= &porttab[portid])->ptstate != PT_ALLOC ) {
+		restore(mask);
+		return (uint32)SYSERR;
+	}
+
+	/* Wait for message and verify that the port is still allocated */
+
+	seq = ptptr->ptseq;		/* Record orignal sequence	*/
+	if (wait(ptptr->ptrsem) == SYSERR || ptptr->ptstate != PT_ALLOC
+	    || ptptr->ptseq != seq) {
+		restore(mask);
+		return (uint32)SYSERR;
+	}
+
+	/* Dequeue first message that is waiting in the port */
+
+	msgnode = ptptr->pthead;
+	msg = msgnode->ptmsg;
+	if (ptptr->pthead == ptptr->pttail)	/* Delete last item	*/
+		ptptr->pthead = ptptr->pttail = NULL;
+	else
+		ptptr->pthead = msgnode->ptnext;
+	msgnode->ptnext = ptfree;		/* Return to free list	*/
+	ptfree = msgnode;
+	signal(ptptr->ptssem);
+	restore(mask);
+	return msg;
+}
diff --git a/system/ptreset.c b/system/ptreset.c
new file mode 100644
index 0000000..607a499
--- /dev/null
+++ b/system/ptreset.c
@@ -0,0 +1,27 @@
+/* ptreset.c - ptreset */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ptreset  -  Reset a port, freeing waiting processes and messages and
+			leaving the port ready for further use
+ *------------------------------------------------------------------------
+ */
+syscall	ptreset(
+	  int32		portid,		/* ID of port to reset		*/
+	  int32		(*disp)(int32)	/* Function to call to dispose	*/
+	)				/*   of waiting messages	*/
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	ptentry	*ptptr;		/* Pointer to port table entry	*/
+
+	mask = disable();
+	if ( isbadport(portid) ||
+	     (ptptr= &porttab[portid])->ptstate != PT_ALLOC ) {
+		restore(mask);
+		return SYSERR;
+	}
+	_ptclear(ptptr, PT_ALLOC, disp);
+	restore(mask);
+	return OK;
+}
diff --git a/system/ptsend.c b/system/ptsend.c
new file mode 100644
index 0000000..acb14ea
--- /dev/null
+++ b/system/ptsend.c
@@ -0,0 +1,60 @@
+/* ptsend.c - ptsend */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  ptsend  -  Send a message to a port by adding it to the queue
+ *------------------------------------------------------------------------
+ */
+syscall	ptsend(
+	  int32		portid,		/* ID of port to use		*/
+	  umsg32	msg		/* Message to send		*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	ptentry	*ptptr;		/* Pointer to table entry	*/
+	int32	seq;			/* Local copy of sequence num.	*/
+	struct	ptnode	*msgnode;	/* Allocated message node 	*/
+	struct	ptnode	*tailnode;	/* Last node in port or NULL	*/
+
+	mask = disable();
+	if ( isbadport(portid) ||
+	     (ptptr= &porttab[portid])->ptstate != PT_ALLOC ) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	/* Wait for space and verify port has not been reset */
+
+	seq = ptptr->ptseq;		/* Record original sequence	*/
+	if (wait(ptptr->ptssem) == SYSERR
+	    || ptptr->ptstate != PT_ALLOC
+	    || ptptr->ptseq != seq) {
+		restore(mask);
+		return SYSERR;
+	}
+	if (ptfree == NULL) {
+		// RAFA panic("Port system ran out of message nodes");
+		panic(&m2[0]);
+	}
+
+	/* Obtain node from free list by unlinking */
+
+	msgnode = ptfree;		/* Point to first free node	*/
+	ptfree  = msgnode->ptnext;	/* Unlink from the free list	*/
+	msgnode->ptnext = NULL;		/* Set fields in the node	*/
+	msgnode->ptmsg  = msg;
+
+	/* Link into queue for the specified port */
+
+	tailnode = ptptr->pttail;
+	if (tailnode == NULL) {		/* Queue for port was empty	*/
+		ptptr->pttail = ptptr->pthead = msgnode;
+	} else {			/* Insert new node at tail	*/
+		tailnode->ptnext = msgnode;
+		ptptr->pttail = msgnode;
+	}
+	signal(ptptr->ptrsem);
+	restore(mask);
+	return OK;
+}
diff --git a/system/putc.c b/system/putc.c
new file mode 100644
index 0000000..f94b526
--- /dev/null
+++ b/system/putc.c
@@ -0,0 +1,27 @@
+/* putc.c - putc */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  putc  -  Send one character of data (byte) to a device
+ *------------------------------------------------------------------------
+ */
+syscall	putc(
+	  did32		descrp,		/* Descriptor for device	*/
+	  char		ch		/* Character to send		*/
+	)
+{
+	intmask		mask;		/* Saved interrupt mask		*/
+	struct dentry	*devptr;	/* Entry in device switch table	*/
+	int32		retval;		/* Value to return to caller	*/
+
+	mask = disable();
+	if (isbaddev(descrp)) {
+		restore(mask);
+		return SYSERR;
+	}
+	devptr = (struct dentry *) &devtab[descrp];
+	retval = (*devptr->dvputc) (devptr, ch);
+	restore(mask);
+	return retval;
+}
diff --git a/system/queue.c b/system/queue.c
new file mode 100644
index 0000000..facf0bf
--- /dev/null
+++ b/system/queue.c
@@ -0,0 +1,52 @@
+/* queue.c - enqueue, dequeue */
+
+#include <xinu.h>
+
+struct qentry	queuetab[NQENT];	/* Table of process queues	*/
+
+/*------------------------------------------------------------------------
+ *  enqueue  -  Insert a process at the tail of a queue
+ *------------------------------------------------------------------------
+ */
+pid32	enqueue(
+	  pid32		pid,		/* ID of process to insert	*/
+	  qid16		q		/* ID of queue to use		*/
+	)
+{
+	qid16	tail, prev;		/* Tail & previous node indexes	*/
+
+	if (isbadqid(q) || isbadpid(pid)) {
+		return SYSERR;
+	}
+
+	tail = queuetail(q);
+	prev = queuetab[tail].qprev;
+
+	queuetab[pid].qnext  = tail;	/* Insert just before tail node	*/
+	queuetab[pid].qprev  = prev;
+	queuetab[prev].qnext = pid;
+	queuetab[tail].qprev = pid;
+	return pid;
+}
+
+/*------------------------------------------------------------------------
+ *  dequeue  -  Remove and return the first process on a list
+ *------------------------------------------------------------------------
+ */
+pid32	dequeue(
+	  qid16		q		/* ID of queue to use		*/
+	)
+{
+	pid32	pid;			/* ID of process removed	*/
+
+	if (isbadqid(q)) {
+		return SYSERR;
+	} else if (isempty(q)) {
+		return EMPTY;
+	}
+
+	pid = getfirst(q);
+	queuetab[pid].qprev = EMPTY;
+	queuetab[pid].qnext = EMPTY;
+	return pid;
+}
diff --git a/system/read.c b/system/read.c
new file mode 100644
index 0000000..0374788
--- /dev/null
+++ b/system/read.c
@@ -0,0 +1,28 @@
+/* read.c - read */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  read  -  Read one or more bytes from a device
+ *------------------------------------------------------------------------
+ */
+syscall	read(
+	  did32		descrp,		/* Descriptor for device	*/
+	  char		*buffer,	/* Address of buffer		*/
+	  uint32	count		/* Length of buffer		*/
+	)
+{
+	intmask		mask;		/* Saved interrupt mask		*/
+	struct dentry	*devptr;	/* Entry in device switch table	*/
+	int32		retval;		/* Value to return to caller	*/
+	
+	mask = disable();
+	if (isbaddev(descrp)) {
+		restore(mask);
+		return SYSERR;
+	}
+	devptr = (struct dentry *) &devtab[descrp];
+	retval = (*devptr->dvread) (devptr, buffer, count);
+	restore(mask);
+	return retval;
+}
diff --git a/system/ready.c b/system/ready.c
new file mode 100644
index 0000000..4cf6281
--- /dev/null
+++ b/system/ready.c
@@ -0,0 +1,30 @@
+/* ready.c - ready */
+
+#include <xinu.h>
+
+qid16	readylist;			/* Index of ready list		*/
+
+/*------------------------------------------------------------------------
+ *  ready  -  Make a process eligible for CPU service
+ *------------------------------------------------------------------------
+ */
+status	ready(
+	  pid32		pid		/* ID of process to make ready	*/
+	)
+{
+	register struct procent *prptr;
+
+	if (isbadpid(pid)) {
+		return SYSERR;
+	}
+
+	/* Set process state to indicate ready and add to ready list */
+
+	prptr = &proctab[pid];
+	prptr->prstate = PR_READY;
+	insert(pid, readylist, prptr->prprio);
+	
+	*SCB_ICSR |= (1 << PENDSV_INTR);
+
+	return OK;
+}
diff --git a/system/receive.c b/system/receive.c
new file mode 100644
index 0000000..daa8b0c
--- /dev/null
+++ b/system/receive.c
@@ -0,0 +1,25 @@
+/* receive.c - receive */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  receive  -  Wait for a message and return the message to the caller
+ *------------------------------------------------------------------------
+ */
+umsg32	receive(void)
+{
+	//intmask	mask;			/* Saved interrupt mask		*/
+	struct	procent *prptr;		/* Ptr to process's table entry	*/
+	umsg32	msg;			/* Message to return		*/
+
+	//mask = disable();
+	prptr = &proctab[currpid];
+	if (prptr->prhasmsg == FALSE) {
+		prptr->prstate = PR_RECV;
+		*SCB_ICSR |= (1 << PENDSV_INTR); /* Reschedule */
+	}
+	msg = prptr->prmsg;		/* Retrieve message		*/
+	prptr->prhasmsg = FALSE;	/* Reset message flag		*/
+	//restore(mask);
+	return msg;
+}
diff --git a/system/recvclr.c b/system/recvclr.c
new file mode 100644
index 0000000..d0393fd
--- /dev/null
+++ b/system/recvclr.c
@@ -0,0 +1,25 @@
+/* recvclr.c - recvclr */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  recvclr  -  Clear incoming message, and return message if one waiting
+ *------------------------------------------------------------------------
+ */
+umsg32	recvclr(void)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	procent *prptr;		/* Ptr to process's table entry	*/
+	umsg32	msg;			/* Message to return		*/
+
+	mask = disable();
+	prptr = &proctab[currpid];
+	if (prptr->prhasmsg == TRUE) {
+		msg = prptr->prmsg;	/* Retrieve message		*/
+		prptr->prhasmsg = FALSE;/* Reset message flag		*/
+	} else {
+		msg = OK;
+	}
+	restore(mask);
+	return msg;
+}
diff --git a/system/recvtime.c b/system/recvtime.c
new file mode 100644
index 0000000..8ff7558
--- /dev/null
+++ b/system/recvtime.c
@@ -0,0 +1,45 @@
+/* recvtime.c - recvtime */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  recvtime  -  Wait specified time to receive a message and return
+ *------------------------------------------------------------------------
+ */
+umsg32	recvtime(
+	  int32		maxwait		/* Ticks to wait before timeout */
+        )
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	procent	*prptr;		/* Tbl entry of current process	*/
+	umsg32	msg;			/* Message to return		*/
+
+	if (maxwait < 0) {
+		return SYSERR;
+	}
+	mask = disable();
+
+	/* Schedule wakeup and place process in timed-receive state */
+
+	prptr = &proctab[currpid];
+	if (prptr->prhasmsg == FALSE) {	/* Delay if no message waiting	*/
+		if (insertd(currpid,sleepq,maxwait) == SYSERR) {
+			restore(mask);
+			return SYSERR;
+		}
+		prptr->prstate = PR_RECTIM;
+		*SCB_ICSR |= (1 << PENDSV_INTR);
+		//resched();
+	}
+
+	/* Either message arrived or timer expired */
+
+	if (prptr->prhasmsg) {
+		msg = prptr->prmsg;	/* Retrieve message		*/
+		prptr->prhasmsg = FALSE;/* Reset message indicator	*/
+	} else {
+		msg = TIMEOUT;
+	}
+	restore(mask);
+	return msg;
+}
diff --git a/system/resched.c b/system/resched.c
new file mode 100644
index 0000000..dcdf060
--- /dev/null
+++ b/system/resched.c
@@ -0,0 +1,146 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+/* resched.c - resched, resched_cntl */
+
+#include <xinu.h>
+
+struct	defer	Defer;
+
+/* Reschedule is implemented on Cortex's PendSV call
+ * The __attribute__((naked)) makes sure the compiler doesn't
+ * places registers on the stack
+ *
+ * A PendSV is similar to an exception or interrupt
+ * A stack frame is pushed on entry and popped
+ * on exit BY PROCESSOR. */
+
+/* A pendSV call before entering this handler
+ * places the following on the stack 
+ * 
+ * R0 <- args[0]
+ * R1 <- args[1]
+ * R2 
+ * R3
+ * R12
+ * LR <- Not a real LR, A certain 'mask'
+ * PC 
+ * PSR <- Status of processor before call
+ *
+ * */
+
+__attribute__ ((naked))
+void resched(void)
+{
+	uint32 * restorestk;
+/*
+	asm volatile("mrs r0, psp");
+	asm volatile("stmdb r0!, {r4-r11}");
+	asm volatile("mov %0, r0" : "=r" (restorestk)); // save tmp pointer
+
+*/
+	struct procent *ptold;	/* Ptr to table entry for old process	*/
+	struct procent *ptnew;	/* Ptr to table entry for new process	*/
+
+	/* If rescheduling is deferred, record attempt and return */
+
+	if (Defer.ndefers > 0) {
+/*
+		Defer.attempt = TRUE;
+		asm volatile ("mov r0, %0" : : "r" (restorestk));
+		asm volatile("ldmia r0!, {r4-r11} ");
+		asm volatile ("msr psp, r0");
+		asm volatile (
+                	 "ldr r0, =0xFFFFFFFD" "\n\t"
+	                 "mov lr, r0" "\n\t"
+	                 "bx lr");
+*/
+	}
+
+	/* Point to process table entry for the current (old) process */
+
+	ptold = &proctab[currpid];
+
+	if (ptold->prstate == PR_CURR) {  /* Process remains eligible */
+		if (ptold->prprio > firstkey(readylist)) {
+/*
+			asm volatile ("mov r0, %0" : : "r" (restorestk));
+			asm volatile("ldmia r0!, {r4-r11} ");
+			asm volatile ("msr psp, r0");
+		        asm volatile (
+                	 "ldr r0, =0xFFFFFFFD" "\n\t"
+	                 "mov lr, r0" "\n\t"
+	                 "bx lr");
+*/
+		}
+
+		/* Old process will no longer remain current */
+
+		ptold->prstate = PR_READY;
+		insert(currpid, readylist, ptold->prprio);
+	}
+
+	/* Force context switch to highest priority ready process */
+
+	
+	currpid = dequeue(readylist);
+	ptnew = &proctab[currpid];
+	ptnew->prstate = PR_CURR;
+	preempt = QUANTUM;		/* Reset time slice for process	*/
+
+
+	ptold->prstkptr = restorestk;
+	
+	/* Old process returns here when resumed */
+/*
+	asm volatile ("mov r0, %0" : : "r" (ptnew->prstkptr));
+	asm volatile("ldmia r0!, {r4-r11} ");
+	asm volatile ("msr psp, r0");
+        asm volatile (
+                 "ldr r0, =0xFFFFFFFD" "\n\t"
+                 "mov lr, r0" "\n\t"
+                 "bx lr");
+*/
+}
+
+/*------------------------------------------------------------------------
+ *  resched_cntl  -  Control whether rescheduling is deferred or allowed
+ *------------------------------------------------------------------------
+ */
+status	resched_cntl(		/* Assumes interrupts are disabled	*/
+	  int32	defer		/* Either DEFER_START or DEFER_STOP	*/
+	)
+{
+	switch (defer) {
+
+	    case DEFER_START:	/* Handle a deferral request */
+
+		if (Defer.ndefers++ == 0) {
+			Defer.attempt = FALSE;
+		}
+		return OK;
+
+	    case DEFER_STOP:	/* Handle end of deferral */
+		if (Defer.ndefers <= 0) {
+			return SYSERR;
+		}
+		if ( (--Defer.ndefers == 0) && Defer.attempt ) {
+			*SCB_ICSR |= (1 << PENDSV_INTR);
+		}
+		return OK;
+
+	    default:
+		return SYSERR;
+	}
+}
diff --git a/system/resched.c.orig b/system/resched.c.orig
new file mode 100644
index 0000000..f6ee210
--- /dev/null
+++ b/system/resched.c.orig
@@ -0,0 +1,138 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+/* resched.c - resched, resched_cntl */
+
+#include <xinu.h>
+
+struct	defer	Defer;
+
+/* Reschedule is implemented on Cortex's PendSV call
+ * The __attribute__((naked)) makes sure the compiler doesn't
+ * places registers on the stack
+ *
+ * A PendSV is similar to an exception or interrupt
+ * A stack frame is pushed on entry and popped
+ * on exit BY PROCESSOR. */
+
+/* A pendSV call before entering this handler
+ * places the following on the stack 
+ * 
+ * R0 <- args[0]
+ * R1 <- args[1]
+ * R2 
+ * R3
+ * R12
+ * LR <- Not a real LR, A certain 'mask'
+ * PC 
+ * PSR <- Status of processor before call
+ *
+ * */
+
+__attribute__ ((naked))
+void resched(void)
+{
+	uint32 * restorestk;
+	asm volatile("mrs r0, psp");
+	asm volatile("stmdb r0!, {r4-r11}");
+	asm volatile("mov %0, r0" : "=r" (restorestk)); // save tmp pointer
+
+	struct procent *ptold;	/* Ptr to table entry for old process	*/
+	struct procent *ptnew;	/* Ptr to table entry for new process	*/
+
+	/* If rescheduling is deferred, record attempt and return */
+
+	if (Defer.ndefers > 0) {
+		Defer.attempt = TRUE;
+		asm volatile ("mov r0, %0" : : "r" (restorestk));
+		asm volatile("ldmia r0!, {r4-r11} ");
+		asm volatile ("msr psp, r0");
+		asm volatile (
+                	 "ldr r0, =0xFFFFFFFD" "\n\t"
+	                 "mov lr, r0" "\n\t"
+	                 "bx lr");
+	}
+
+	/* Point to process table entry for the current (old) process */
+
+	ptold = &proctab[currpid];
+
+	if (ptold->prstate == PR_CURR) {  /* Process remains eligible */
+		if (ptold->prprio > firstkey(readylist)) {
+			asm volatile ("mov r0, %0" : : "r" (restorestk));
+			asm volatile("ldmia r0!, {r4-r11} ");
+			asm volatile ("msr psp, r0");
+		        asm volatile (
+                	 "ldr r0, =0xFFFFFFFD" "\n\t"
+	                 "mov lr, r0" "\n\t"
+	                 "bx lr");
+		}
+
+		/* Old process will no longer remain current */
+
+		ptold->prstate = PR_READY;
+		insert(currpid, readylist, ptold->prprio);
+	}
+
+	/* Force context switch to highest priority ready process */
+
+	
+	currpid = dequeue(readylist);
+	ptnew = &proctab[currpid];
+	ptnew->prstate = PR_CURR;
+	preempt = QUANTUM;		/* Reset time slice for process	*/
+
+
+	ptold->prstkptr = restorestk;
+	
+	/* Old process returns here when resumed */
+	asm volatile ("mov r0, %0" : : "r" (ptnew->prstkptr));
+	asm volatile("ldmia r0!, {r4-r11} ");
+	asm volatile ("msr psp, r0");
+        asm volatile (
+                 "ldr r0, =0xFFFFFFFD" "\n\t"
+                 "mov lr, r0" "\n\t"
+                 "bx lr");
+}
+
+/*------------------------------------------------------------------------
+ *  resched_cntl  -  Control whether rescheduling is deferred or allowed
+ *------------------------------------------------------------------------
+ */
+status	resched_cntl(		/* Assumes interrupts are disabled	*/
+	  int32	defer		/* Either DEFER_START or DEFER_STOP	*/
+	)
+{
+	switch (defer) {
+
+	    case DEFER_START:	/* Handle a deferral request */
+
+		if (Defer.ndefers++ == 0) {
+			Defer.attempt = FALSE;
+		}
+		return OK;
+
+	    case DEFER_STOP:	/* Handle end of deferral */
+		if (Defer.ndefers <= 0) {
+			return SYSERR;
+		}
+		if ( (--Defer.ndefers == 0) && Defer.attempt ) {
+			*SCB_ICSR |= (1 << PENDSV_INTR);
+		}
+		return OK;
+
+	    default:
+		return SYSERR;
+	}
+}
diff --git a/system/resume.c b/system/resume.c
new file mode 100644
index 0000000..6b1fe8d
--- /dev/null
+++ b/system/resume.c
@@ -0,0 +1,35 @@
+/* resume.c - resume */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  resume  -  Unsuspend a process, making it ready
+ *------------------------------------------------------------------------
+ */
+pri16	resume(
+	  pid32		pid		/* ID of process to unsuspend	*/
+	)
+{
+
+
+	//intmask	mask;			/* Saved interrupt mask		*/
+	struct	procent *prptr;		/* Ptr to process's table entry	*/
+	pri16	prio;			/* Priority to return		*/
+
+	//mask = disable();
+	if (isbadpid(pid)) {
+// RAFA ACA ABORTA		notmain();
+	//	restore(mask);
+		return (pri16)SYSERR;
+	}
+	prptr = &proctab[pid];
+	if (prptr->prstate != PR_SUSP) {
+	//	restore(mask);
+		return (pri16)SYSERR;
+	}
+	prio = prptr->prprio;		/* Record priority to return	*/
+
+	ready(pid);
+	//restore(mask);
+	return prio;
+}
diff --git a/system/seek.c b/system/seek.c
new file mode 100644
index 0000000..38cd6b7
--- /dev/null
+++ b/system/seek.c
@@ -0,0 +1,27 @@
+/* seek.c - seek */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  seek  -  Position a random access device
+ *------------------------------------------------------------------------
+ */
+syscall	seek(
+	  did32		descrp,		/* Descriptor for device	*/
+	  uint32	pos		/* Position			*/
+	)
+{
+	intmask		mask;		/* Saved interrupt mask		*/
+	struct dentry	*devptr;	/* Entry in device switch table	*/
+	int32		retval;		/* Value to return to caller	*/
+
+	mask = disable();
+	if (isbaddev(descrp)) {
+		restore(mask);
+		return SYSERR;
+	}
+	devptr = (struct dentry *) &devtab[descrp];
+	retval = (*devptr->dvseek) (devptr, pos);
+	restore(mask);
+	return retval;
+}
diff --git a/system/semcount.c b/system/semcount.c
new file mode 100644
index 0000000..d993206
--- /dev/null
+++ b/system/semcount.c
@@ -0,0 +1,26 @@
+/* semcount.c - semcount */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  semcount  -  Return the count of a semaphore (because any integer is
+ *		   possible, return of SYSERR may be ambiguous)
+ *------------------------------------------------------------------------
+ */
+syscall semcount(
+	  sid32		semid		/* ID of semaphore to use	*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	int32	count;			/* Current sempahore count	*/
+
+	mask = disable();
+	
+	if (isbadsem(semid) || semtab[semid].sstate == S_FREE) {
+		restore(mask);
+		return SYSERR;
+	}
+	count = semtab[semid].scount;
+	restore(mask);
+	return count;
+}
diff --git a/system/semcreate.c b/system/semcreate.c
new file mode 100644
index 0000000..32401b4
--- /dev/null
+++ b/system/semcreate.c
@@ -0,0 +1,50 @@
+/* semcreate.c - semcreate, newsem */
+
+#include <xinu.h>
+
+local	sid32	newsem(void);
+
+/*------------------------------------------------------------------------
+ *  semcreate  -  Create a new semaphore and return the ID to the caller
+ *------------------------------------------------------------------------
+ */
+sid32	semcreate(
+	  int32		count		/* Initial semaphore count	*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	sid32	sem;			/* Semaphore ID to return	*/
+
+	mask = disable();
+
+	if (count < 0 || ((sem=newsem())==SYSERR)) {
+		restore(mask);
+		return SYSERR;
+	}
+	semtab[sem].scount = count;	/* Initialize table entry	*/
+
+	restore(mask);
+	return sem;
+}
+
+/*------------------------------------------------------------------------
+ *  newsem  -  Allocate an unused semaphore and return its index
+ *------------------------------------------------------------------------
+ */
+local	sid32	newsem(void)
+{
+	static	sid32	nextsem = 0;	/* Next semaphore index to try	*/
+	sid32	sem;			/* Semaphore ID to return	*/
+	int32	i;			/* Iterate through # entries	*/
+
+	for (i=0 ; i<NSEM ; i++) {
+		sem = nextsem++;
+		if (nextsem >= NSEM)
+			nextsem = 0;
+		if (semtab[sem].sstate == S_FREE) {
+			semtab[sem].sstate = S_USED;
+			return sem;
+		}
+	}
+	return SYSERR;
+}
diff --git a/system/semdelete.c b/system/semdelete.c
new file mode 100644
index 0000000..5990652
--- /dev/null
+++ b/system/semdelete.c
@@ -0,0 +1,36 @@
+/* semdelete.c - semdelete */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ * semdelete  -  Delete a semaphore by releasing its table entry
+ *------------------------------------------------------------------------
+ */
+syscall	semdelete(
+	  sid32		sem		/* ID of semaphore to delete	*/
+	)
+{
+	intmask mask;			/* Saved interrupt mask		*/
+	struct	sentry *semptr;		/* Ptr to semaphore table entry	*/
+
+	mask = disable();
+	if (isbadsem(sem)) {
+		restore(mask);
+		return SYSERR;
+	}
+	
+	semptr = &semtab[sem];
+	if (semptr->sstate == S_FREE) {
+		restore(mask);
+		return SYSERR;
+	}
+	semptr->sstate = S_FREE;
+
+	resched_cntl(DEFER_START);
+	while (semptr->scount++ < 0) {	/* Free all waiting processes	*/
+		ready(getfirst(semptr->squeue));
+	}
+	resched_cntl(DEFER_STOP);
+	restore(mask);
+	return OK;
+}
diff --git a/system/semreset.c b/system/semreset.c
new file mode 100644
index 0000000..9331312
--- /dev/null
+++ b/system/semreset.c
@@ -0,0 +1,35 @@
+/* semreset.c - semreset */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  semreset  -  Reset a semaphore's count and release waiting processes
+ *------------------------------------------------------------------------
+ */
+syscall	semreset(
+	  sid32		sem,		/* ID of semaphore to reset	*/
+	  int32		count		/* New count (must be >= 0)	*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	sentry *semptr;		/* Ptr to semaphore table entry */
+	qid16	semqueue;		/* Semaphore's process queue ID	*/
+	pid32	pid;			/* ID of a waiting process	*/
+
+	mask = disable();
+
+	if (count < 0 || isbadsem(sem) || semtab[sem].sstate==S_FREE) {
+		restore(mask);
+		return SYSERR;
+	}
+	
+	semptr = &semtab[sem];
+	semqueue = semptr->squeue;	/* Free any waiting processes */
+	resched_cntl(DEFER_START);
+	while ((pid=getfirst(semqueue)) != EMPTY)
+		ready(pid);
+	semptr->scount = count;		/* Reset count as specified */
+	resched_cntl(DEFER_STOP);
+	restore(mask);
+	return OK;
+}
diff --git a/system/send.c b/system/send.c
new file mode 100644
index 0000000..1983c6d
--- /dev/null
+++ b/system/send.c
@@ -0,0 +1,41 @@
+/* send.c - send */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  send  -  Pass a message to a process and start recipient if waiting
+ *------------------------------------------------------------------------
+ */
+syscall	send(
+	  pid32		pid,		/* ID of recipient process	*/
+	  umsg32	msg		/* Contents of message		*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	procent *prptr;		/* Ptr to process's table entry	*/
+
+	mask = disable();
+	if (isbadpid(pid)) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	prptr = &proctab[pid];
+	if (prptr->prhasmsg) {
+		restore(mask);
+		return SYSERR;
+	}
+	prptr->prmsg = msg;		/* Deliver message		*/
+	prptr->prhasmsg = TRUE;		/* Indicate message is waiting	*/
+
+	/* If recipient waiting or in timed-wait make it ready */
+
+	if (prptr->prstate == PR_RECV) {
+		ready(pid);
+	} else if (prptr->prstate == PR_RECTIM) {
+		unsleep(pid);
+		ready(pid);
+	}
+	restore(mask);		/* Restore interrupts */
+	return OK;
+}
diff --git a/system/serial_avr.c b/system/serial_avr.c
new file mode 100644
index 0000000..bd1cc61
--- /dev/null
+++ b/system/serial_avr.c
@@ -0,0 +1,130 @@
+#include <xinu.h>
+
+/* Completar la estructura de datos para que se superponga a los registros
+   del periferico de hardware del USART del atmega328, segun sugerido
+   en el apunte */
+
+typedef struct
+{
+    uint8_t status_control_a;    /* ucsr0a USART Control and Status A */
+
+    uint8_t status_control_b; /* ucsr0b USART Control and Status B */
+    uint8_t status_control_c; /* ucsr0c USART Control and Status C */
+    uint8_t _reserved; /* espacio sin utilizar */
+    uint8_t baud_rate_l; /* ubrr0l baud rate low */
+    uint8_t baud_rate_h; /* ubrr0h baud rate high */
+
+    uint8_t data_es;    /* udr0 i/o data */
+
+} volatile uart_t;
+
+/* puntero a la estructura de los registros del periferico */
+// volatile uart_t *puerto_serial = (uart_t *) (0xc0);
+
+char letra_start = 'R';
+char cadena[100];
+
+#define F_CPU 16000000UL
+
+#define USART_BAUDRATE 9600
+#define BAUD_PRESCALE (((F_CPU/(USART_BAUDRATE*16UL)))-1)
+#define INIT 0x06
+#define EN_RX_TX 0x18
+#define EN_TX 0x20
+#define EN_RX 0x80
+
+
+
+void serial_init() {
+
+	/* Configurar los registros High y Low con BAUD_PRESCALE */
+
+	blink_avr();
+
+       /* Load .data segment into SRAM */
+        // extern uint32 * etext, data, edata;
+	// extern uint32 * _rom_data_begin;
+        // int size = (&edata - &data); 
+        // memcpy(&data, &_rom_data_begin, size);    
+
+
+
+  extern uint32_t __data;
+  extern uint32_t __data_end;
+  extern uint32_t __data_load;
+  extern uint32_t __bss;
+  extern uint32_t __bss_end;
+  extern uint32_t __vectors;
+
+  uint32_t *from = &__data_load;
+  uint32_t *to = &__data;
+  unsigned char b;
+  // Relocate .data section
+//  for (uint32_t *from = &__data_load, *to = &__data; to < &__data_end; from++, to++) {
+ //   b = *from;
+  //  *to = b;
+  //}
+
+  // Clear .bss
+  //for (uint32_t *to = &__bss; to < &__bss_end; to++)
+  //{
+   // *to = 0;
+  //}
+
+
+	volatile uart_t *puerto_serial = (uart_t *) (0xc0);
+
+	puerto_serial->baud_rate_h = (unsigned char) (BAUD_PRESCALE>>8);
+	puerto_serial->baud_rate_l = (unsigned char) (BAUD_PRESCALE);
+	/* Configurar un frame de 8bits, con un bit de paridad y bit de stop */
+	puerto_serial->status_control_c = (unsigned char)(INIT);
+
+	/* Activar la recepcion y transmicion */
+	puerto_serial->status_control_b = (unsigned char)(EN_RX_TX);
+
+	while(!((puerto_serial->status_control_a) & (EN_TX)));
+	// puerto_serial->data_es = letra_start;
+	puerto_serial->data_es = 'R';
+}
+
+
+/* enviar un byte a traves del del dispositivo inicializado */
+void serial_put_char (char outputChar)
+{
+	volatile uart_t *puerto_serial = (uart_t *) (0xc0);
+
+	while(!((puerto_serial->status_control_a) & (EN_TX)));
+
+	puerto_serial->data_es = outputChar;
+}
+
+
+char serial_get_char(void)
+{
+	volatile uart_t *puerto_serial = (uart_t *) (0xc0);
+    /* Wait for the next character to arrive. */
+	while(!((puerto_serial->status_control_a) & (EN_RX)));
+	return (puerto_serial->data_es);
+}
+
+void serial_put_str (char * mensaje)
+{
+	while (*mensaje) {
+		serial_put_char(*mensaje);
+		mensaje++;
+	};
+}
+
+char* serial_get_str(void)
+{
+	int i = 0;
+	char l = serial_get_char();
+    	while((l != '\r') && (l != '\n') && (l != '\0')){
+		cadena[i]=l;
+		i++;
+		l = serial_get_char();
+	};
+	cadena[i]='\0';/*agrega el fin de cadena*/
+	return cadena;
+
+}
diff --git a/system/signal.c b/system/signal.c
new file mode 100644
index 0000000..94c2179
--- /dev/null
+++ b/system/signal.c
@@ -0,0 +1,31 @@
+/* signal.c - signal */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  signal  -  Signal a semaphore, releasing a process if one is waiting
+ *------------------------------------------------------------------------
+ */
+syscall	signal(
+	  sid32		sem		/* ID of semaphore to signal	*/
+	)
+{
+	intmask mask;			/* Saved interrupt mask		*/
+	struct	sentry *semptr;		/* Ptr to sempahore table entry	*/
+
+	mask = disable();
+	if (isbadsem(sem)) {
+		restore(mask);
+		return SYSERR;
+	}
+	semptr= &semtab[sem];
+	if (semptr->sstate == S_FREE) {
+		restore(mask);
+		return SYSERR;
+	}
+	if ((semptr->scount++) < 0) {	/* Release a waiting process */
+		ready(dequeue(semptr->squeue));
+	}
+	restore(mask);
+	return OK;
+}
diff --git a/system/signaln.c b/system/signaln.c
new file mode 100644
index 0000000..7b0e316
--- /dev/null
+++ b/system/signaln.c
@@ -0,0 +1,37 @@
+/* signaln.c - signaln */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  signaln  -  Signal a semaphore n times, releasing n waiting processes
+ *------------------------------------------------------------------------
+ */
+syscall	signaln(
+	  sid32		sem,		/* ID of semaphore to signal	*/
+	  int32		count		/* Number of times to signal	*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	sentry	*semptr;	/* Ptr to sempahore table entry */
+
+	mask = disable();
+	if (isbadsem(sem) || (count < 0)) {
+		restore(mask);
+		return SYSERR;
+	}
+	semptr = &semtab[sem];
+	if (semptr->sstate == S_FREE) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	resched_cntl(DEFER_START);
+	for (; count > 0; count--) {
+		if ((semptr->scount++) < 0) {
+			ready(dequeue(semptr->squeue));
+		}
+	}
+	resched_cntl(DEFER_STOP);
+	restore(mask);
+	return OK;
+}
diff --git a/system/sleep.c b/system/sleep.c
new file mode 100644
index 0000000..90e1024
--- /dev/null
+++ b/system/sleep.c
@@ -0,0 +1,54 @@
+/* sleep.c - sleep sleepms */
+
+#include <xinu.h>
+
+#define	MAXSECONDS	2147483		/* Max seconds per 32-bit msec	*/
+
+/*------------------------------------------------------------------------
+ *  sleep  -  Delay the calling process n seconds
+ *------------------------------------------------------------------------
+ */
+syscall	sleep(
+	  int32	delay		/* Time to delay in seconds	*/
+	)
+{
+	if ( (delay < 0) || (delay > MAXSECONDS) ) {
+		return SYSERR;
+	}
+	sleepms(1000*delay);
+	return OK;
+}
+
+/*------------------------------------------------------------------------
+ *  sleepms  -  Delay the calling process n milliseconds
+ *------------------------------------------------------------------------
+ */
+syscall	sleepms(
+	  int32	delay			/* Time to delay in msec.	*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+
+	if (delay < 0) {
+		return SYSERR;
+	}
+
+	if (delay == 0) {
+		yield();
+		return OK;
+	}
+
+	/* Delay calling process */
+
+	mask = disable();
+	if (insertd(currpid, sleepq, delay) == SYSERR) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	proctab[currpid].prstate = PR_SLEEP;
+	*SCB_ICSR |= (1 << PENDSV_INTR);	
+	
+	restore(mask);
+	return OK;
+}
diff --git a/system/start.S b/system/start.S
new file mode 100644
index 0000000..c8ad97f
--- /dev/null
+++ b/system/start.S
@@ -0,0 +1,53 @@
+#include <avr/io.h>
+
+.weak __heap_end
+.set  __heap_end, 0
+
+.macro vector name
+    .weak \name
+    .set \name, __vectors
+    jmp \name
+.endm
+
+.section .vectors
+__vectors:
+//    jmp __init
+    jmp __ctors_end
+    vector __vector_1
+    vector __vector_2
+    vector __vector_3
+    vector __vector_4
+    vector __vector_5
+    vector __vector_6
+    vector __vector_7
+    vector __vector_8
+    vector __vector_9
+    vector __vector_10
+    vector __vector_11
+    vector __vector_12
+    vector __vector_13
+    vector __vector_14
+    vector __vector_15
+    vector __vector_16
+    vector __vector_17
+    vector __vector_18
+    vector __vector_19
+    vector __vector_20
+    vector __vector_21
+    vector __vector_22
+    vector __vector_23
+    vector __vector_24
+    vector __vector_25
+
+// .section .init2
+// __init:
+//     clr r1
+  //   out _SFR_IO_ADDR(SREG), r1
+//     ldi r28, lo8(RAMEND)
+//     ldi r29, hi8(RAMEND)
+//     out _SFR_IO_ADDR(SPL), r28
+//     out _SFR_IO_ADDR(SPH), r29
+
+// .section .init9
+.section .init8
+    jmp nulluser
diff --git a/system/start.S.avr b/system/start.S.avr
new file mode 100644
index 0000000..14d13c3
--- /dev/null
+++ b/system/start.S.avr
@@ -0,0 +1,51 @@
+#include <avr/io.h>
+
+.weak __heap_end
+.set  __heap_end, 0
+
+.macro vector name
+    .weak \name
+    .set \name, __vectors
+    jmp \name
+.endm
+
+.section .vectors
+__vectors:
+    jmp __init
+    vector __vector_1
+    vector __vector_2
+    vector __vector_3
+    vector __vector_4
+    vector __vector_5
+    vector __vector_6
+    vector __vector_7
+    vector __vector_8
+    vector __vector_9
+    vector __vector_10
+    vector __vector_11
+    vector __vector_12
+    vector __vector_13
+    vector __vector_14
+    vector __vector_15
+    vector __vector_16
+    vector __vector_17
+    vector __vector_18
+    vector __vector_19
+    vector __vector_20
+    vector __vector_21
+    vector __vector_22
+    vector __vector_23
+    vector __vector_24
+    vector __vector_25
+
+.section .init2
+__init:
+    clr r1
+    out _SFR_IO_ADDR(SREG), r1
+    ldi r28, lo8(RAMEND)
+    ldi r29, hi8(RAMEND)
+    out _SFR_IO_ADDR(SPL), r28
+    out _SFR_IO_ADDR(SPH), r29
+
+.section .init9
+    jmp nulluser
diff --git a/system/start.S.orig b/system/start.S.orig
new file mode 100644
index 0000000..9454775
--- /dev/null
+++ b/system/start.S.orig
@@ -0,0 +1,94 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+/* start.S - start, bzero */
+
+#include <cortexm3.h>
+
+/*------------------------------------------------------------------------
+ * start  -  Initial entry point for a Xinu image (ARM Cortex-M3)
+ *------------------------------------------------------------------------
+ */
+	.text
+	.equ STACK_TOP, MAXADDR /* 64kB SRAM Top */
+	.globl start	/* entry point */
+	.globl reset		
+	.code 16
+	.syntax unified
+start:
+	/* Load the stack pointer with end of memory */
+	.word STACK_TOP, reset
+	.type reset, function
+
+reset:
+	/* Disable interrupts */
+	cpsid	i
+
+	/* Use bzero (below) to zero out the BSS area */
+	ldr	r0, =edata
+	ldr	r1, =end
+	bl	bzero 
+	
+	/* Since the OS is directly running from flash */
+	/* we need to load the .data segment in SRAM */
+	/* See nulluser (initialize.c) */
+
+	/* Call nulluser to initialize the Xinu system  */
+	/*    (Note: the call never returns)		*/
+
+	b	nulluser
+
+// RAFA
+.align
+
+.thumb_func
+.globl PUT16
+PUT16:
+    strh r1,[r0]
+    bx lr
+
+.thumb_func
+.globl PUT32
+PUT32:
+    str r1,[r0]
+    bx lr
+
+.thumb_func
+.globl GET32
+GET32:
+    ldr r0,[r0]
+    bx lr
+
+.thumb_func
+.globl dummy
+dummy:
+    bx lr
+
+
+// FIN RAFA
+
+/* Function to zero memory (r0 is lowest addr; r1 is highest)	*/
+
+bzero:
+	mov	r2, #0			/* Round address to multiple	*/
+	add	r0, r0, #3		/*   of four by adding 3 and	*/
+	and	r0, r0, #0xFFFFFFFC	/*   taking the result module 4	*/
+bloop:	cmp	r0, r1			/* Loop until last address	*/
+	bhs	bexit			/*   has been reached		*/
+	str	r2, [r0]		/* Zero four-byte word of memory*/
+	add	r0, r0, #4		/* Move to next word		*/
+	b	bloop			/* Continue to iterate		*/
+bexit:	mov	pc, lr			/* Return to caller		*/
+	
+	.end
diff --git a/system/suspend.c b/system/suspend.c
new file mode 100644
index 0000000..05553fc
--- /dev/null
+++ b/system/suspend.c
@@ -0,0 +1,41 @@
+/* suspend.c - suspend */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  suspend  -  Suspend a process, placing it in hibernation
+ *------------------------------------------------------------------------
+ */
+syscall	suspend(
+	  pid32		pid		/* ID of process to suspend	*/
+	)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+	struct	procent *prptr;		/* Ptr to process's table entry	*/
+	pri16	prio;			/* Priority to return		*/
+
+	mask = disable();
+	if (isbadpid(pid) || (pid == NULLPROC)) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	/* Only suspend a process that is current or ready */
+
+	prptr = &proctab[pid];
+	if ((prptr->prstate != PR_CURR) && (prptr->prstate != PR_READY)) {
+		restore(mask);
+		return SYSERR;
+	}
+	if (prptr->prstate == PR_READY) {
+		getitem(pid);		    /* Remove a ready process	*/
+					    /*   from the ready list	*/
+		prptr->prstate = PR_SUSP;
+	} else {
+		prptr->prstate = PR_SUSP;   /* Mark the current process	*/
+		*SCB_ICSR |= (1 << PENDSV_INTR);
+	}
+	prio = prptr->prprio;
+	restore(mask);
+	return prio;
+}
diff --git a/system/syscall.c b/system/syscall.c
new file mode 100644
index 0000000..94d5d9a
--- /dev/null
+++ b/system/syscall.c
@@ -0,0 +1,102 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+#include <xinu.h>
+
+/* System call handler 
+ * The __attribute__((naked)) makes sure the compiler doesn't
+ * places registers on the stack
+ *
+ * A SVC is similar to an exception or interrupt
+ * A stack frame is pushed on entry and popped
+ * on exit BY PROCESSOR. Please see in-function command */
+
+__attribute__ ((naked))
+void _svc_handler(void) {
+
+	uint32 * args;
+
+	/* Test whether system call was invoked from supervisor (use MSP) or
+	 * user (use PSP) mode (needed for future purposes) */
+/*
+	asm volatile (
+	"tst lr, #4" "\n\t"
+	"ite eq" "\n\t"
+	"mrseq %0, msp" "\n\t"
+	"mrsne %0, psp" "\n\t"
+	"push {lr}" "\n\t"
+	"push {r4-r11}" : "=r" (args));
+
+	/* An exception (or interrupt) before entering this handler
+	 * places the following on the stack 
+	 * 
+	 * R0 <- args[0]
+	 * R1 <- args[1]
+	 * R2 
+	 * R3
+	 * R12
+	 * LR <- Not a real LR, A certain 'mask'
+	 * PC <- placed at args[6], see description below
+	 * PSR <- Status of processor before call
+	 *
+	 * PC contains the return address that will continue after this SVC handler
+	 * is finised. The previous address (the svc # call) is at PC - 2, the
+	 * first byte contains the svc number.
+	 * */
+
+	//uint8 svc_nr = ((char *) args[6])[-2];
+	uint8 svc_nr = args[0];
+	int ret = -1;
+	struct procent * p;
+
+	switch(svc_nr) {
+		/* The nullprocess is a special case and used only for startup
+		 * The stack for the nullprocess is loaded and the processor makes
+		 * a jump back to thread mode with the PSP stack */
+		case XINU_NULLPROCESS:
+			p = (struct procent *) args[1]; 
+//	  		asm volatile ("mov r0, %0" : : "r" (p->prstkptr));
+ //               	asm volatile("ldmia r0!, {r4-r11} ");
+  //               	asm volatile ("msr psp, r0");
+   //              	asm volatile (
+    //                      "ldr r0, =0xFFFFFFFD" "\n\t"
+     //                     "mov lr, r0" "\n\t"
+      //                    "bx lr");
+			break;
+		case XINU_PUTC: /* Example system call usage */
+			ret = putc(args[1], args[2]);
+			break;
+		default:
+			kprintf("System call not implemented\n");	
+			break;
+	}
+
+	/* Return value in r0 for callee */
+	args[0] = ret;
+
+//	asm volatile ("pop {r4-r11}");
+	/* exception return, 0xFFFFFFFX (<-- last value is flag
+	 * and gives the processor information to return to what */
+//	asm volatile ("pop {lr}"); 
+//	asm volatile ("bx lr");
+
+
+}
+
+void syscall_init() {
+	/* SVC handler function is set in the interrupt vector table  */
+//	set_evec(SVC_ENTRY, (uint32)_svc_handler);
+}
+
+
diff --git a/system/syscall.c.orig b/system/syscall.c.orig
new file mode 100644
index 0000000..1e1c387
--- /dev/null
+++ b/system/syscall.c.orig
@@ -0,0 +1,101 @@
+/* Xinu for STM32
+ *
+ * Original license applies
+ * Modifications for STM32 by Robin Krens
+ * Please see LICENSE and AUTHORS 
+ * 
+ * $LOG$
+ * 2019/11/11 - ROBIN KRENS
+ * Initial version 
+ * 
+ * $DESCRIPTION$
+ *
+ * */
+
+#include <xinu.h>
+
+/* System call handler 
+ * The __attribute__((naked)) makes sure the compiler doesn't
+ * places registers on the stack
+ *
+ * A SVC is similar to an exception or interrupt
+ * A stack frame is pushed on entry and popped
+ * on exit BY PROCESSOR. Please see in-function command */
+
+__attribute__ ((naked))
+void _svc_handler(void) {
+
+	uint32 * args;
+
+	/* Test whether system call was invoked from supervisor (use MSP) or
+	 * user (use PSP) mode (needed for future purposes) */
+	asm volatile (
+	"tst lr, #4" "\n\t"
+	"ite eq" "\n\t"
+	"mrseq %0, msp" "\n\t"
+	"mrsne %0, psp" "\n\t"
+	"push {lr}" "\n\t"
+	"push {r4-r11}" : "=r" (args));
+
+	/* An exception (or interrupt) before entering this handler
+	 * places the following on the stack 
+	 * 
+	 * R0 <- args[0]
+	 * R1 <- args[1]
+	 * R2 
+	 * R3
+	 * R12
+	 * LR <- Not a real LR, A certain 'mask'
+	 * PC <- placed at args[6], see description below
+	 * PSR <- Status of processor before call
+	 *
+	 * PC contains the return address that will continue after this SVC handler
+	 * is finised. The previous address (the svc # call) is at PC - 2, the
+	 * first byte contains the svc number.
+	 * */
+
+	//uint8 svc_nr = ((char *) args[6])[-2];
+	uint8 svc_nr = args[0];
+	int ret = -1;
+	struct procent * p;
+
+	switch(svc_nr) {
+		/* The nullprocess is a special case and used only for startup
+		 * The stack for the nullprocess is loaded and the processor makes
+		 * a jump back to thread mode with the PSP stack */
+		case XINU_NULLPROCESS:
+			p = (struct procent *) args[1]; 
+	  		asm volatile ("mov r0, %0" : : "r" (p->prstkptr));
+                	asm volatile("ldmia r0!, {r4-r11} ");
+                 	asm volatile ("msr psp, r0");
+                 	asm volatile (
+                          "ldr r0, =0xFFFFFFFD" "\n\t"
+                          "mov lr, r0" "\n\t"
+                          "bx lr");
+			break;
+		case XINU_PUTC: /* Example system call usage */
+			ret = putc(args[1], args[2]);
+			break;
+		default:
+			kprintf("System call not implemented\n");	
+			break;
+	}
+
+	/* Return value in r0 for callee */
+	args[0] = ret;
+
+	asm volatile ("pop {r4-r11}");
+	/* exception return, 0xFFFFFFFX (<-- last value is flag
+	 * and gives the processor information to return to what */
+	asm volatile ("pop {lr}"); 
+	asm volatile ("bx lr");
+
+
+}
+
+void syscall_init() {
+	/* SVC handler function is set in the interrupt vector table  */
+	set_evec(SVC_ENTRY, (uint32)_svc_handler);
+}
+
+
diff --git a/system/unsleep.c b/system/unsleep.c
new file mode 100644
index 0000000..89f0771
--- /dev/null
+++ b/system/unsleep.c
@@ -0,0 +1,47 @@
+/* unsleep.c - unsleep */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  unsleep  -  Internal function to remove a process from the sleep
+ *		    queue prematurely.  The caller must adjust the delay
+ *		    of successive processes.
+ *------------------------------------------------------------------------
+ */
+status	unsleep(
+	  pid32		pid		/* ID of process to remove	*/
+        )
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+        struct	procent	*prptr;		/* Ptr to process's table entry	*/
+
+        pid32	pidnext;		/* ID of process on sleep queue	*/
+					/*   that follows the process	*/
+					/*   which is being removed	*/
+
+	mask = disable();
+
+	if (isbadpid(pid)) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	/* Verify that candidate process is on the sleep queue */
+
+	prptr = &proctab[pid];
+	if ((prptr->prstate!=PR_SLEEP) && (prptr->prstate!=PR_RECTIM)) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	/* Increment delay of next process if such a process exists */
+
+	pidnext = queuetab[pid].qnext;
+	if (pidnext < NPROC) {
+		queuetab[pidnext].qkey += queuetab[pid].qkey;
+	}
+
+	getitem(pid);			/* Unlink process from queue */
+	restore(mask);
+	return OK;
+}
diff --git a/system/userret.c b/system/userret.c
new file mode 100644
index 0000000..5e7a975
--- /dev/null
+++ b/system/userret.c
@@ -0,0 +1,12 @@
+/* userret.c - userret */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  userret  -  Called when a process returns from the top-level function
+ *------------------------------------------------------------------------
+ */
+void	userret(void)
+{
+	kill(getpid());			/* Force process to exit */
+}
diff --git a/system/wait.c b/system/wait.c
new file mode 100644
index 0000000..3341bc5
--- /dev/null
+++ b/system/wait.c
@@ -0,0 +1,39 @@
+/* wait.c - wait */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  wait  -  Cause current process to wait on a semaphore
+ *------------------------------------------------------------------------
+ */
+syscall	wait(
+	  sid32		sem		/* Semaphore on which to wait  */
+	)
+{
+	intmask mask;			/* Saved interrupt mask		*/
+	struct	procent *prptr;		/* Ptr to process's table entry	*/
+	struct	sentry *semptr;		/* Ptr to sempahore table entry	*/
+
+	mask = disable();
+	if (isbadsem(sem)) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	semptr = &semtab[sem];
+	if (semptr->sstate == S_FREE) {
+		restore(mask);
+		return SYSERR;
+	}
+
+	if (--(semptr->scount) < 0) {		/* If caller must block	*/
+		prptr = &proctab[currpid];
+		prptr->prstate = PR_WAIT;	/* Set state to waiting	*/
+		prptr->prsem = sem;		/* Record semaphore ID	*/
+		enqueue(currpid,semptr->squeue);/* Enqueue on semaphore	*/
+		*SCB_ICSR |= (1 << PENDSV_INTR);
+	}
+
+	restore(mask);
+	return OK;
+}
diff --git a/system/wakeup.c b/system/wakeup.c
new file mode 100644
index 0000000..aa19aec
--- /dev/null
+++ b/system/wakeup.c
@@ -0,0 +1,19 @@
+/* wakeup.c - wakeup */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  wakeup  -  Called by clock interrupt handler to awaken processes
+ *------------------------------------------------------------------------
+ */
+void	wakeup(void)
+{
+	/* Awaken all processes that have no more time to sleep */
+	resched_cntl(DEFER_START);
+	while (nonempty(sleepq) && (firstkey(sleepq) <= 0)) {
+		ready(dequeue(sleepq));
+	}
+
+	resched_cntl(DEFER_STOP);
+	return;
+}
diff --git a/system/write.c b/system/write.c
new file mode 100644
index 0000000..0cbcb78
--- /dev/null
+++ b/system/write.c
@@ -0,0 +1,28 @@
+/* write.c - write */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  write  -  Write one or more bytes to a device
+ *------------------------------------------------------------------------
+ */
+syscall	write(
+	  did32		descrp,		/* Descriptor for device	*/
+	  char		*buffer,	/* Address of buffer		*/
+	  uint32	count		/* Length of buffer		*/
+	)
+{
+	intmask		mask;		/* Saved interrupt mask		*/
+	struct dentry	*devptr;	/* Entry in device switch table	*/
+	int32		retval;		/* Value to return to caller	*/
+
+	mask = disable();
+	if (isbaddev(descrp)) {
+		restore(mask);
+		return SYSERR;
+	}
+	devptr = (struct dentry *) &devtab[descrp];
+	retval = (*devptr->dvwrite) (devptr, buffer, count);
+	restore(mask);
+	return retval;
+}
diff --git a/system/xdone.c b/system/xdone.c
new file mode 100644
index 0000000..ec20f15
--- /dev/null
+++ b/system/xdone.c
@@ -0,0 +1,14 @@
+/* xdone.c - xdone */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  xdone  -  Print system completion message as last process exits
+ *------------------------------------------------------------------------
+ */
+void	xdone(void)
+{
+	// RAFA kprintf("\n\nAll user processes have completed.\n\n");
+	kprintf(&m3[0]);
+	halt();				/* Halt the processor		*/
+}
diff --git a/system/yield.c b/system/yield.c
new file mode 100644
index 0000000..4e70819
--- /dev/null
+++ b/system/yield.c
@@ -0,0 +1,17 @@
+/* yield.c - yield */
+
+#include <xinu.h>
+
+/*------------------------------------------------------------------------
+ *  yield  -  Voluntarily relinquish the CPU (end a timeslice)
+ *------------------------------------------------------------------------
+ */
+syscall	yield(void)
+{
+	intmask	mask;			/* Saved interrupt mask		*/
+
+	mask = disable();
+	*SCB_ICSR |= (1 << PENDSV_INTR);
+	restore(mask);
+	return OK;
+}
diff --git a/xinu-avr-port.txt b/xinu-avr-port.txt
new file mode 100644
index 0000000..fccd207
--- /dev/null
+++ b/xinu-avr-port.txt
@@ -0,0 +1,26 @@
+
+en el ldscript hay que limpiar y dejar las variables tal cual
+
+El simbolo etext tiene la dirección en flash donde termina .text,
+por lo tanto, ahí comienza .data, y desde ahí hay que copiar
+a la ram
+
+la ram empieza en 0x800100 (en realidad parece empezar en
+0x800060, pero el linker de avr-gcc pone esa dirección porque al parecer
+en el 0x800060 hay registros.
+
+Hay que copiar .data a 0x800100, la cantidad de datos: que es 
+_data_end - etext.
+
+Luego hay que iniciarlizar bss. Podría hacerse con memset en 
+RAM 0x800100 + (_data_end - etext) y la cantidad de bytes 
+end - _bss_begin  (end es el final de la imagen).
+
+Todos estos simbolos estan en el ld.script.avr
+
+
+Hay que establecer el stack. Al menos puede ser 0x8008FF. pero 
+no sé si necesita estar alineado.
+
+El inicio del stack es 
+0x800100 + (_data_end - etext) + (end - _bss_begin)