diff --git a/ports/c16x/include/arch/sys_arch.h b/ports/c16x/include/arch/sys_arch.h
deleted file mode 100644
index dae2a55..0000000
--- a/ports/c16x/include/arch/sys_arch.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef __SYS_ARCH_H__
-#define __SYS_ARCH_H__
-
-#define SEMA int
-#define QUEUE int
-#define TASK int
-
-#define SYS_MBOX_NULL (QUEUE)0
-#define SYS_SEM_NULL  (SEMA)0
-
-typedef SEMA sys_sem_t;
-typedef QUEUE sys_mbox_t;
-typedef TASK sys_thread_t;
-
-#endif /* __SYS_ARCH_H__ */
diff --git a/ports/c16x/sys_arch.c b/ports/c16x/sys_arch.c
deleted file mode 100644
index d21edab..0000000
--- a/ports/c16x/sys_arch.c
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- * Copyright (c) 2001, Swedish Institute of Computer Science.
- * All rights reserved. 
- *
- * Redistribution and use in source and binary forms, with or without 
- * modification, are permitted provided that the following conditions 
- * are met: 
- * 1. Redistributions of source code must retain the above copyright 
- *    notice, this list of conditions and the following disclaimer. 
- * 2. Redistributions in binary form must reproduce the above copyright 
- *    notice, this list of conditions and the following disclaimer in the 
- *    documentation and/or other materials provided with the distribution. 
- * 3. Neither the name of the Institute nor the names of its contributors 
- *    may be used to endorse or promote products derived from this software 
- *    without specific prior written permission. 
- *
- * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
- * SUCH DAMAGE. 
- *
- * This file is part of the lwIP TCP/IP stack.
- * 
- * Author: Adam Dunkels <adam@sics.se>
- *
- * $Id: sys_arch.c,v 1.1 2003/01/18 18:21:57 jani Exp $
- */
-
-#include "lwip/def.h"
-#include "lwip/sys.h"
-#include "lwip/mem.h"
-
-//#include "timers.h"
-
-static struct sys_timeouts timeouts;
-
-/*-----------------------------------------------------------------------------------*/
-sys_mbox_t
-sys_mbox_new(void)
-{
-  return SYS_MBOX_NULL;
-}
-/*-----------------------------------------------------------------------------------*/
-void
-sys_mbox_free(sys_mbox_t mbox)
-{
-  if (mbox); // LEON: prevent warning
-  return;
-}
-/*-----------------------------------------------------------------------------------*/
-void
-sys_mbox_post(sys_mbox_t mbox, void *data)
-{
-  if (mbox); // LEON: prevent warning
-  if (data); // LEON: prevent warning
-  return;
-}
-
-u16_t
-sys_arch_mbox_fetch(sys_mbox_t mbox, void **msg, u16_t timeout)
-{
-  if (mbox); // LEON: prevent warning
-  if (msg); // LEON: prevent warning
-  if (timeout); // LEON: prevent warning
-  return 0;
-}
-/*-----------------------------------------------------------------------------------*/
-sys_sem_t
-sys_sem_new(u8_t count)
-{
-  if (count);
-  return 0;
-}
-/*-----------------------------------------------------------------------------------*/
-u16_t
-sys_arch_sem_wait(sys_sem_t sem, u16_t timeout)
-{
-  if (sem);
-  return 0;
-}
-/*-----------------------------------------------------------------------------------*/
-void
-sys_sem_signal(sys_sem_t sem)
-{
-  if (sem);
-  return;
-}
-/*-----------------------------------------------------------------------------------*/
-void
-sys_sem_free(sys_sem_t sem)
-{
-  if (sem);
-  return;
-}
-
-void
-sys_init(void)
-{
-  timeouts.next = NULL;
-  return;
-}
-
-struct sys_timeouts *
-sys_arch_timeouts(void)
-{
-  return &timeouts;
-}
-
-u8_t			
-sys_timeout_u32_t(u32_t msecs, sys_timeout_handler h, void *data) // LEON: arg 1 was unsigned int
-{
-  return 0;
-  // WAS: return timer_obtain(msecs, h, data);
-  // RE-ENABLE IF DHCP_TIMER_CALLBACKS
-#if DHCP_TIMER_CALLBACKS
-#error DHCP_TIMER_CALLBACKS not supported!
-#endif
-}
-
-void
-sys_thread_new(void (* function)(void *arg), void *arg)
-{
-  if (arg); // LW
-}
-/*-----------------------------------------------------------------------------------*/
-void
-sys_main(void)
-{
-}
-/*-----------------------------------------------------------------------------------*/