diff --git a/.gitignore b/.gitignore
index 09bc759..59feef7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,4 +4,5 @@
 *gif~
 *bmp~
 nasu
-untitled.chr
\ No newline at end of file
+untitled.chr
+nasu.rom
\ No newline at end of file
diff --git a/README.md b/README.md
index 22b603d..8d688db 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,12 @@ To build nasu, you must have [SDL2](https://wiki.libsdl.org/).
 cc nasu.c -std=c89 -Os -DNDEBUG -g0 -s -Wall -L/usr/local/lib -lSDL2 -o nasu
 ```
 
+To assemble and run for Uxn.
+
+```
+uxnasm nasu.usm nasu.rom && uxnemu nasu.rom
+```
+
 ## I/O
 
 To resume working on a tileset:
diff --git a/nasu.usm b/nasu.usm
new file mode 100644
index 0000000..cc81f9f
--- /dev/null
+++ b/nasu.usm
@@ -0,0 +1,892 @@
+(
+	app/nasu : spritesheet editor
+
+	arrows - move selection
+	ctrl+arrows - change page
+	left-click  - add pixel
+	right-click  - remove pixel
+	1 2 3  - select brush
+
+	TODO:
+		Copy in 2 bits mode, copies 2 tiles
+		Modify up to 4 pages
+		Save/load/rename
+		Select paint color for 2-bit mode
+)
+
+%+  { ADD } %-   { SUB }  %*  { MUL } %/   { DIV }
+%<  { LTH } %>   { GTH }  %=  { EQU } %!   { NEQ }
+%++ { ADD2 } %-- { SUB2 } %** { MUL2 } %// { DIV2 }
+%<< { LTH2 } %>> { GTH2 } %== { EQU2 } %!! { NEQ2 }
+
+%RTN { JMP2r }
+%STEP8 { #0033 SFT2 }
+
+%SFL { #40 SFT SFT }
+%MOD { DUP2 DIV MUL SUB }
+
+%TOB { SWP POP } %TOS { #00 SWP }
+
+%DEBUG  { .Console/byte DEO #0a .Console/char DEO }
+%DEBUG2 { .Console/short DEO2 #0a .Console/char DEO }
+
+%LTS2  { #8000 ++ SWP2 #8000 ++ >> }
+%GTS2  { #8000 ++ SWP2 #8000 ++ << }
+
+%SIZE-TO-RECT {
+	STH2 STH2 OVR2 STH2r ++ OVR2 STH2r ++
+} ( x y w h -- x1 y1 x2 y2 )
+
+%SET-RECT {
+	DUP2 ROT2 SWP2 #0006 ++ STA2
+	DUP2 ROT2 SWP2 #0004 ++ STA2
+	DUP2 ROT2 SWP2 #0002 ++ STA2
+	DUP2 ROT2 SWP2 STA2
+	POP2
+} ( x1 y1 x2 y2 addr -- )
+
+%BANK { #2000 }
+
+( devices )
+
+|00 @System     [ &vector $2 &pad     $6 &r $2 &g $2 &b $2 ]
+|10 @Console    [ &vector $2 &pad     $6 &char $1 &byte $1 &short $2 &string $2 ]
+|20 @Screen     [ &vector $2 &width   $2 &height $2 &pad $2 &x $2 &y $2 &addr $2 &color $1 ]
+|80 @Controller [ &vector $2 &button  $1 &key $1 ]
+|90 @Mouse      [ &vector $2 &x       $2 &y $2 &state $1 &chord $1 ]
+|a0 @File       [ &vector $2 &success $2 &offset $2 &pad $2 &name $2 &length $2 &load $2 &save $2 ]
+
+( variables )
+
+|0000
+
+@settings [ 
+	&blending $1 
+	&depth $1 
+	&brush $1 
+	&page $2 
+	&tile $2 
+	&ratio $1 ]
+
+@frame [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 &width $2 &height $2 ]
+
+( interface )
+@bankview  [ &x  $2 &y  $2 &mode $1 &selection $1 ]
+@tileview  [ &x  $2 &y  $2 ]
+
+@editview  [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
+@colorview [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
+@blendview [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
+@dataview  [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
+@preview   [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
+
+@rect [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
+@mouse [ &x $2 &y $2 ]
+@pt [ &x $1 &y $1 ]
+@pos [ &x $2 &y $2 ]
+
+@color $1 
+@i     $1
+
+( program )
+
+|0100 ( -> )
+
+	( theme ) 
+	#0efc .System/r DEO2 
+	#03cc .System/g DEO2 
+	#03ac .System/b DEO2
+
+	( vectors )
+	;on-button   .Controller/vector DEO2
+	;on-mouse    .Mouse/vector DEO2
+	;on-transfer .File/vector DEO2
+
+	( set defaults )
+	#0130 .frame/width STZ2
+	#00a8 .frame/height STZ2
+	#01 .settings/brush STZ
+	#32 .settings/ratio STZ
+
+	.Screen/width DEI2 #0001 SFT2 .frame/width LDZ2 #0001 SFT2 --
+	.Screen/height DEI2 #0001 SFT2 .frame/height LDZ2 #0001 SFT2 -- #0010 ++
+	.frame/width LDZ2 .frame/height LDZ2
+	SIZE-TO-RECT ;frame SET-RECT
+
+	.frame/x1 LDZ2 #0010 ++ .bankview/x STZ2
+	.frame/y1 LDZ2 .bankview/y STZ2
+	BANK .settings/page STZ2
+
+	.frame/x2 LDZ2 #0098 -- .tileview/x STZ2
+	.frame/y1 LDZ2 .tileview/y STZ2
+	BANK #0448 ++ .settings/tile STZ2
+
+	.frame/x2 LDZ2 #0010 -- .frame/y1 LDZ2 #0010 #0080 SIZE-TO-RECT ;dataview SET-RECT
+	.frame/x1 LDZ2 #0010 ++ .frame/y2 LDZ2 #0020 -- #0020 #0020 SIZE-TO-RECT ;blendview SET-RECT
+	.frame/x1 LDZ2 #0060 ++ .frame/y2 LDZ2 #0020 -- #0020 #0020 SIZE-TO-RECT ;colorview SET-RECT
+	.frame/x1 LDZ2 #0038 ++ .frame/y2 LDZ2 #0020 -- #0020 #0020 SIZE-TO-RECT ;preview SET-RECT
+	.frame/x2 LDZ2 #0098 -- .frame/y1 LDZ2 #0080 #0080 SIZE-TO-RECT ;editview SET-RECT
+
+	( editview grid )
+	.editview/x1 LDZ2 DUP2 #0080 ++ .editview/y1 LDZ2 #0020 ++ #03 ;line-hor JSR2
+	.editview/x1 LDZ2 DUP2 #0080 ++ .editview/y1 LDZ2 #0040 ++ #03 ;line-hor JSR2
+	.editview/x1 LDZ2 DUP2 #0080 ++ .editview/y1 LDZ2 #0060 ++ #03 ;line-hor JSR2
+	.editview/x1 LDZ2 #0020 ++ .editview/y1 LDZ2 DUP2 #0080 ++ #03 ;line-ver JSR2
+	.editview/x1 LDZ2 #0040 ++ .editview/y1 LDZ2 DUP2 #0080 ++ #03 ;line-ver JSR2
+	.editview/x1 LDZ2 #0060 ++ .editview/y1 LDZ2 DUP2 #0080 ++ #03 ;line-ver JSR2
+
+	.editview/x1 LDZ2 #0002 -- .editview/y1 LDZ2 #0002 -- .editview/x2 LDZ2 #0001 ++ .editview/y2 LDZ2 #0001 ++ #03 ;line-rect JSR2
+
+	#01 .settings/blending STZ
+
+	;filepath1 .File/name DEO2 #0800 .File/length DEO2 BANK .File/load DEO2
+	;filepath2 .File/name DEO2 #0800 .File/length DEO2 BANK #0800 ++ .File/load DEO2
+	;filepath3 .File/name DEO2 #1000 .File/length DEO2 BANK #1000 ++ .File/load DEO2
+	;filepath4 .File/name DEO2 #1000 .File/length DEO2 BANK #2000 ++ .File/load DEO2
+	;filepath5 .File/name DEO2 #1000 .File/length DEO2 BANK #2800 ++ .File/load DEO2
+	;filepath6 .File/name DEO2 #1000 .File/length DEO2 BANK #3800 ++ .File/load DEO2
+
+	#40 DUP .bankview/selection STZ ;select-tile JSR2
+
+BRK
+
+@on-transfer ( -> )
+	
+	;redraw JSR2
+	
+BRK
+
+@on-button ( -> )
+	
+	( skip ) .Controller/button DEI #00 NEQ #01 JCN [ BRK ]
+
+	.Controller/button DEI #11 NEQ ,&no-pageup JCN .settings/page LDZ2
+		#0800 -- .settings/page STZ2 
+		;redraw JSR2 
+		BRK &no-pageup
+
+	.Controller/button DEI #21 NEQ ,&no-pagedown JCN .settings/page LDZ2
+		#0800 ++ .settings/page STZ2 
+		;redraw JSR2 
+		BRK &no-pagedown
+
+	.Controller/button DEI #f0 AND
+		DUP #04 SFT #01 AND #01 NEQ ,&no-up JCN
+			( move ) .bankview/selection LDZ #10 SUB .bankview/selection STZ &no-up
+		DUP #05 SFT #01 AND #01 NEQ ,&no-down JCN
+			( move ) .bankview/selection LDZ #10 + .bankview/selection STZ &no-down
+		DUP #06 SFT #01 AND #01 NEQ ,&no-left JCN
+			( move ) .bankview/selection LDZ #01 SUB .bankview/selection STZ &no-left
+		DUP #07 SFT #01 AND #01 NEQ ,&no-right JCN
+			( move ) .bankview/selection LDZ #01 + .bankview/selection STZ &no-right
+		POP
+
+	.bankview/selection LDZ ;select-tile JSR2
+
+BRK
+
+@on-mouse ( -> )
+	
+	;draw-cursor JSR2
+
+	( skip ) .Mouse/state DEI #00 NEQ #01 JCN [ BRK ]
+
+	( toolbar )
+	.Mouse/y DEI2 .bankview/y LDZ2 #0010 -- -- #0008 // #0000 !! ;&no-toolbar-click JCN2
+		( brush )
+		.Mouse/x DEI2 .bankview/x LDZ2 -- #0008 // #000d << ,&no-brush-click JCN
+		.Mouse/x DEI2 .bankview/x LDZ2 -- #0008 // #000f >> ,&no-brush-click JCN
+			( select ) .mouse/x LDZ2 .bankview/x LDZ2 -- #0008 // #000d -- TOB .bankview/mode STZ
+		&no-brush-click
+		.Mouse/x DEI2 .bankview/x LDZ2 -- #0008 // #0005 !! ,&no-toggle-depth JCN
+			;toggle-depth JSR2
+		&no-toggle-depth
+			( release ) #00 .Mouse/state DEO
+			;redraw JSR2 BRK
+	&no-toolbar-click
+
+	( bankview )
+	.Mouse/x DEI2 .bankview/x LDZ2 >> .Mouse/x DEI2 .bankview/x LDZ2 #0080 ++ << #0101 ==
+	.Mouse/y DEI2 .bankview/y LDZ2 >> .Mouse/y DEI2 .bankview/y LDZ2 #0080 ++ << #0101 ==
+	#0101 == ;on-touch-bankview JCN2
+
+	( tileview )
+	.Mouse/x DEI2 .tileview/x LDZ2 >> .Mouse/x DEI2 .tileview/x LDZ2 #0080 ++ << #0101 ==
+	.Mouse/y DEI2 .tileview/y LDZ2 >> .Mouse/y DEI2 .tileview/y LDZ2 #0080 ++ << #0101 ==
+	#0101 == ;on-touch-tileview JCN2
+
+	( editview )
+	.Mouse/x DEI2 DUP2 .editview/x1 LDZ2 >> ROT ROT .editview/x2 LDZ2 << #0101 ==
+	.Mouse/y DEI2 DUP2 .editview/y1 LDZ2 >> ROT ROT .editview/y2 LDZ2 << #0101 ==
+	#0101 == ;on-touch-editview JCN2
+
+	( dataview )
+	.Mouse/x DEI2 DUP2 .dataview/x1 LDZ2 >> ROT ROT .dataview/x2 LDZ2 << #0101 ==
+	.Mouse/y DEI2 DUP2 .dataview/y1 LDZ2 >> ROT ROT .dataview/y2 LDZ2 << #0101 ==
+	#0101 == ;on-touch-dataview JCN2
+
+	( blendbiew )
+	.Mouse/x DEI2 DUP2 .blendview/x1 LDZ2 >> ROT ROT .blendview/x2 LDZ2 << #0101 ==
+	.Mouse/y DEI2 DUP2 .blendview/y1 LDZ2 >> ROT ROT .blendview/y2 LDZ2 << #0101 ==
+	#0101 == ;on-touch-blendview JCN2
+
+	( colorview )
+	.Mouse/x DEI2 DUP2 .colorview/x1 LDZ2 >> ROT ROT .colorview/x2 LDZ2 << #0101 ==
+	.Mouse/y DEI2 DUP2 .colorview/y1 LDZ2 >> ROT ROT .colorview/y2 LDZ2 << #0101 ==
+	#0101 == ;on-touch-colorview JCN2
+
+	( preview )
+	.Mouse/x DEI2 DUP2 .preview/x1 LDZ2 >> ROT ROT .preview/x2 LDZ2 << #0101 ==
+	.Mouse/y DEI2 DUP2 .preview/y1 LDZ2 >> ROT ROT .preview/y2 LDZ2 << #0101 ==
+	#0101 == ;on-touch-preview JCN2
+
+BRK
+
+@on-touch-bankview ( -> )
+	
+	.bankview/mode LDZ #01 NEQ ,&not-copy-mode JCN
+		#00 .i STZ
+		&copy-loop
+			( load ) .settings/tile LDZ2 .i LDZ + LDA
+			( get touch addr )
+			.Mouse/x DEI2 .bankview/x LDZ2 -- STEP8
+			.Mouse/y DEI2 .bankview/y LDZ2 -- STEP8 #0010 ** ++
+			( 2-bit mode ) #00 .settings/depth LDZ #01 + **
+			.settings/page LDZ2 ++ #00 .i LDZ ++ STA
+			( incr ) .i LDZ #01 + .i STZ
+			.i LDZ #08 LTH ,&copy-loop JCN
+		;redraw JSR2 BRK
+	&not-copy-mode
+
+	.bankview/mode LDZ #02 NEQ ,&not-erase-mode JCN
+		#00 .i STZ
+		&erase-loop
+			#00
+			( get touch addr )
+			.Mouse/x DEI2 .bankview/x LDZ2 -- STEP8
+			.Mouse/y DEI2 .bankview/y LDZ2 -- STEP8 #0010 ** ++
+			( 2-bit mode ) #00 .settings/depth LDZ #01 + **
+			.settings/page LDZ2 ++ #00 .i LDZ ++ STA
+			( incr ) .i LDZ #01 + .i STZ
+			.i LDZ #08 LTH ,&erase-loop JCN
+		;redraw JSR2 BRK
+	&not-erase-mode
+
+	( select )
+
+	.Mouse/x DEI2 .bankview/x LDZ2 -- #0008 // TOB
+	.Mouse/y DEI2 .bankview/y LDZ2 -- #0008 // TOB #40 SFT +
+	DUP .bankview/selection STZ
+	;select-tile JSR2
+
+BRK
+
+@on-touch-tileview ( -> )
+	
+
+BRK
+
+@on-touch-editview ( -> )
+	
+	#aa DEBUG
+
+BRK
+
+@on-touch-dataview ( -> )
+
+	.Mouse/y DEI2 .dataview/y1 LDZ2 -- STEP8 TOB #60 EQU ,&skip JCN BRK &skip
+	.Mouse/x DEI2 .dataview/x1 LDZ2 -- #0008 // TOB
+	DUP #00 NEQ ,&no-move-up JCN
+		;op_shiftup JSR2
+		( release ) #00 .Mouse/state DEO
+		;redraw JSR2 POP BRK &no-move-up
+	DUP #01 NEQ ,&no-move-down JCN
+		;op_shiftdown JSR2
+		( release ) #00 .Mouse/state DEO
+		;redraw JSR2 POP BRK &no-move-down
+	POP
+
+BRK
+
+@on-touch-blendview ( -> )
+
+	.Mouse/x DEI2 .blendview/x1 LDZ2 -- #0008 // TOB
+	.Mouse/y DEI2 .blendview/y1 LDZ2 -- #0008 // TOB #04 MUL +
+	.settings/blending STZ
+	( release ) #00 .Mouse/state DEO
+	;redraw JSR2
+
+BRK
+
+@on-touch-colorview ( -> )
+
+	( channel ) .Mouse/y DEI2 .colorview/y1 LDZ2 -- #0008 // TOB STH
+	( rgb ) .Mouse/x DEI2 .colorview/x1 LDZ2 -- #0008 // TOB
+	DUP #00 NEQ ,&no-brush JCN
+		DUPr STHr .settings/brush STZ &no-brush
+	DUP #01 NEQ ,&no-red JCN
+		DUPr STHr .System/r ;set-color JSR2 &no-red
+	DUP #02 NEQ ,&no-green JCN
+		DUPr STHr .System/g ;set-color JSR2 &no-green
+	DUP #03 NEQ ,&no-blue JCN
+		DUPr STHr .System/b ;set-color JSR2 &no-blue
+	POP POPr
+	( release ) #00 .Mouse/state DEO
+	;redraw JSR2
+
+BRK
+
+@on-touch-preview ( -> )
+
+	( y ) .Mouse/y DEI2 .preview/y1 LDZ2 -- #0008 // TOB
+	( x ) .Mouse/x DEI2 .preview/x1 LDZ2 -- #0008 // TOB
+
+	#40 SFT + #11 +
+	.settings/ratio STZ
+
+	( release ) #00 .Mouse/state DEO
+
+	( clear editview )
+	.editview/x1 LDZ2 .editview/y1 LDZ2 .editview/x2 LDZ2 .editview/y2 LDZ2 #00 ;fill-rect JSR2
+
+	;redraw JSR2
+
+BRK
+
+@set-color ( color rgb -- )
+	
+	STH
+	DUP #00 NEQ ,&no-red0 JCN
+		DUPr STHr DEI DUP #04 SFT #01 +
+		( add/sub ) .Mouse/state DEI #10 EQU #fe MUL +
+		( resume ) #40 SFT SWP #0f AND + DUPr STHr DEO
+		&no-red0
+	DUP #01 NEQ ,&no-red1 JCN
+		DUPr STHr DEI DUP #0f AND #01 +
+		( add/sub ) .Mouse/state DEI #10 EQU #fe MUL +
+		( resume ) #0f AND SWP #f0 AND + DUPr STHr DEO
+		&no-red1
+	DUP #02 NEQ ,&no-red2 JCN
+		DUPr STHr #01 + DEI DUP #04 SFT #01 +
+		( add/sub ) .Mouse/state DEI #10 EQU #fe MUL +
+		( resume ) #40 SFT SWP #0f AND + DUPr STHr #01 + DEO
+		&no-red2
+	DUP #03 NEQ ,&no-red3 JCN
+		DUPr STHr #01 + DEI DUP #0f AND #01 +
+		( add/sub ) .Mouse/state DEI #10 EQU #fe MUL +
+		( resume ) #0f AND SWP #f0 AND + DUPr STHr #01 + DEO
+		&no-red3
+	POP
+	POPr
+
+RTN
+
+@select-tile ( pos -- )
+
+	( x y ) DUP #0f AND SWP #04 SFT
+	( y ) #10 MOD #10 MUL #00 SWP #0008 **
+	( x ) ROT #10 MOD #00 SWP #0008 ** ++
+	( 2-bit mode ) #00 .settings/depth LDZ #01 + **
+	( offset ) .settings/page LDZ2 ++ .settings/tile STZ2
+	;redraw JSR2
+
+RTN
+
+@toggle-depth ( -- )
+	
+	.bankview/selection LDZ
+	.settings/depth LDZ #00 EQU .settings/depth STZ
+	;select-tile JSR2
+
+RTN
+
+@op_shiftup ( -- )
+	
+	.settings/tile LDZ2 LDA
+	.settings/tile LDZ2 #0001 ++ LDA .settings/tile LDZ2 STA
+	.settings/tile LDZ2 #0002 ++ LDA .settings/tile LDZ2 #0001 ++ STA
+	.settings/tile LDZ2 #0003 ++ LDA .settings/tile LDZ2 #0002 ++ STA
+	.settings/tile LDZ2 #0004 ++ LDA .settings/tile LDZ2 #0003 ++ STA
+	.settings/tile LDZ2 #0005 ++ LDA .settings/tile LDZ2 #0004 ++ STA
+	.settings/tile LDZ2 #0006 ++ LDA .settings/tile LDZ2 #0005 ++ STA
+	.settings/tile LDZ2 #0007 ++ LDA .settings/tile LDZ2 #0006 ++ STA
+	.settings/tile LDZ2 #0007 ++ STA
+
+RTN
+
+@op_shiftdown ( -- )
+	
+	.settings/tile LDZ2 #0007 ++ LDA
+	.settings/tile LDZ2 #0006 ++ LDA .settings/tile LDZ2 #0007 ++ STA
+	.settings/tile LDZ2 #0005 ++ LDA .settings/tile LDZ2 #0006 ++ STA
+	.settings/tile LDZ2 #0004 ++ LDA .settings/tile LDZ2 #0005 ++ STA
+	.settings/tile LDZ2 #0003 ++ LDA .settings/tile LDZ2 #0004 ++ STA
+	.settings/tile LDZ2 #0002 ++ LDA .settings/tile LDZ2 #0003 ++ STA
+	.settings/tile LDZ2 #0001 ++ LDA .settings/tile LDZ2 #0002 ++ STA
+	.settings/tile LDZ2 LDA .settings/tile LDZ2 #0001 ++ STA
+	.settings/tile LDZ2 STA
+
+RTN
+
+@redraw ( -- )
+	
+	;draw-bankview JSR2
+	;draw-editview JSR2
+	;draw-blendview JSR2
+	;draw-colorview JSR2
+	;draw-dataview JSR2
+	;draw-preview JSR2
+
+RTN
+
+@draw-bankview ( -- )
+	
+	.bankview/x LDZ2 #0002 -- .bankview/y LDZ2 #0002 -- .bankview/x LDZ2 #0081 ++ .bankview/y LDZ2 #0081 ++ #03 ;line-rect JSR2
+
+	( position )
+
+	.bankview/x LDZ2 .Screen/x DEO2
+	.bankview/y LDZ2 #0010 -- .Screen/y DEO2
+	.settings/page LDZ2 #22 ;draw-short JSR2
+
+	( toolbar )
+
+	.bankview/y LDZ2 #0010 -- .Screen/y DEO2
+
+	.bankview/x LDZ2 #0028 ++ .Screen/x DEO2
+	;depth_icns #00 .settings/depth LDZ #0008 ** ++ .Screen/addr DEO2
+	#23 .Screen/color DEO
+
+	.bankview/x LDZ2 #0068 ++ .Screen/x DEO2
+	;tool_selector .Screen/addr DEO2
+	#21 .bankview/mode LDZ #00 EQU + .Screen/color DEO
+
+	.Screen/x DEI2 #0008 ++ .Screen/x DEO2
+	;tool_hand .Screen/addr DEO2
+	#21 .bankview/mode LDZ #01 EQU + .Screen/color DEO
+
+	.Screen/x DEI2 #0008 ++ .Screen/x DEO2
+	;tool_eraser .Screen/addr DEO2
+	#21 .bankview/mode LDZ #02 EQU + .Screen/color DEO
+
+	( guides )
+
+	.bankview/x LDZ2 #0010 -- .Screen/x DEO2
+	.bankview/y LDZ2 .Screen/y DEO2
+	;font-hex .Screen/addr DEO2
+	#00 #10
+	&guides
+		( draw ) OVR .bankview/selection LDZ #04 SFT EQU #22 + .Screen/color DEO
+		.Screen/addr DEI2 #0008 ++ .Screen/addr DEO2
+		.Screen/y DEI2 #0008 ++ .Screen/y DEO2
+		SWP #01 + SWP
+		DUP2 LTH ,&guides JCN
+	POP2
+
+	( draw page )
+
+	( load ) .settings/page LDZ2 .Screen/addr DEO2
+	.bankview/y LDZ2 DUP2 #0080 ++
+	&ver
+		( save ) OVR2 .Screen/y DEO2
+		.bankview/x LDZ2 DUP2 #0080 ++
+		&hor
+			( save ) OVR2 .Screen/x DEO2
+			( get selected ) .Screen/addr DEI2 .settings/tile LDZ2 ==
+			( get blending ) .settings/blending LDZ
+			( get depth ) .settings/depth LDZ #20 MUL
+			( draw ) #20 + + + .Screen/color DEO
+			( incr ) SWP2 #0008 ++ SWP2
+			( incr ) .Screen/addr DEI2 #0008 ++ #00 .settings/depth LDZ #0008 ** ++ .Screen/addr DEO2
+			OVR2 OVR2 << ,&hor JCN
+		POP2 POP2
+		( incr ) SWP2 #0008 ++ SWP2
+		OVR2 OVR2 << ,&ver JCN
+	POP2 POP2
+
+RTN
+
+@draw-editview ( -- )
+
+	( position )
+	.editview/x1 LDZ2 .Screen/x DEO2
+	.editview/y1 LDZ2 #0010 -- .Screen/y DEO2
+	.settings/tile LDZ2 #22 ;draw-short JSR2
+
+	( tiles )
+	.settings/tile LDZ2 DUP2 STH2 .Screen/addr DEO2
+	#00 #04
+	&ver
+		OVR #20 MUL TOS .editview/y1 LDZ2 ++ .Screen/y DEO2
+		#00 #04
+		&hor
+			OVR #20 MUL TOS .editview/x1 LDZ2 ++ .Screen/x DEO2
+			( get x,y )
+			SWP2 OVR STH SWP2 OVR STHr
+			( check if within ratio )
+			.settings/ratio LDZ #0f AND LTH STH
+			.settings/ratio LDZ #04 SFT LTH STHr
+			#0101 !! ,&outside JCN 
+				DUP2r STH2r .Screen/addr DEO2
+				#01 ,draw-tile JSR
+				( incr ) STH2r #0008 ++ STH2
+			&outside
+			( incr ) SWP #01 + SWP
+			DUP2 LTH ,&hor JCN
+		POP2
+		( incr ) SWP #01 + SWP
+		DUP2 LTH ;&ver JCN2
+	POP2
+	POP2r
+
+RTN
+
+@draw-tile ( color -- )
+
+	STH
+	#00 #20
+	&ver
+		#00 #20
+		&hor
+			OVR #04 MOD #00 EQU ,&skip JCN
+			STH2 OVR STH2r ROT #04 MOD #00 EQU ,&skip JCN
+
+			( get x,y )
+			SWP2 OVR STH SWP2 OVR STHr
+			( get address )
+			.Screen/addr DEI2 
+			( after this, +R XY )
+			SWP2 SWP STH
+			( got sprite line )
+			#04 DIV TOS ++ LDA
+			( get pixel )
+			STHr #04 DIV
+			#07 SWP SUB SFT #01 AND
+			.Screen/color DEO
+
+			&skip
+			#0001 .Screen/x DEI2 ++ .Screen/x DEO2
+			( incr ) SWP #01 + SWP
+			DUP2 LTH ,&hor JCN
+		POP2
+		#0001 .Screen/y DEI2 ++ .Screen/y DEO2
+		.Screen/x DEI2 #0020 -- .Screen/x DEO2
+		( incr ) SWP #01 + SWP
+		DUP2 LTH ,&ver JCN
+	POP2
+	.Screen/y DEI2 #0020 -- .Screen/y DEO2
+	POPr
+
+RTN
+
+@draw-tileview-icn ( -- )
+
+	#00 .pt/x STZ #00 .pt/y STZ
+	&ver
+		#00 .pt/x STZ
+		&hor
+			( get bit )
+			;blank_icn #00
+			.settings/tile LDZ2 #00 .pt/y LDZ ++ LDA #07 .pt/x LDZ SUB SFT #01 AND ( get bit )
+			#0008 ** ++ .Screen/addr DEO2 ( add *8 )
+			( draw ) #21 .Screen/color DEO
+			( incr ) .Screen/x DEI2 #0008 ++ .Screen/x DEO2
+			( incr ) .pt/x LDZ #01 + .pt/x STZ
+			.pt/x LDZ #08 LTH ;&hor JCN2
+		( incr ) .Screen/y DEI2 #0008 ++ .Screen/y DEO2
+		( incr ) .pt/y LDZ #01 + .pt/y STZ
+		.Screen/x DEI2 #0040 -- .Screen/x DEO2
+		.pt/y LDZ #08 LTH ;&ver JCN2
+
+RTN
+
+@draw-dataview ( -- )
+
+	( bytes )
+	.tileview/y LDZ2 #0018 ++ .Screen/y DEO2
+	#00 .i STZ
+	&bytes
+		.tileview/x LDZ2 #0088 ++ .Screen/x DEO2
+		.settings/tile LDZ2 #00 .i LDZ ++ LDA #22 ;draw-byte JSR2
+		( incr ) .i LDZ #01 + .i STZ
+		( incr ) .Screen/y DEI2 #0008 ++ .Screen/y DEO2
+	.i LDZ #08 LTH ;&bytes JCN2
+
+	( operations )
+	.Screen/y DEI2 #0008 ++ .Screen/y DEO2
+	;movedown_icn .Screen/addr DEO2
+	#21 .Screen/color DEO
+	.Screen/x DEI2 #0008 -- .Screen/x DEO2
+	;moveup_icn .Screen/addr DEO2
+	#21 .Screen/color DEO
+
+	( draw tiles 2x2 )
+	.tileview/y LDZ2 .Screen/y DEO2
+	#00 .pt/x STZ #00 .pt/y STZ .settings/tile LDZ2 .Screen/addr DEO2
+
+	&tiles-ver
+		#00 .pt/x STZ
+		.tileview/x LDZ2 #0088 ++ .Screen/x DEO2
+		&tiles-hor
+			( draw ) #23 .Screen/color DEO
+			( incr ) .Screen/x DEI2 #0008 ++ .Screen/x DEO2
+			( incr ) .Screen/addr DEI2 #0008 ++ .Screen/addr DEO2
+			( incr ) .pt/x LDZ #01 + .pt/x STZ
+			.pt/x LDZ #02 LTH ;&tiles-hor JCN2
+		( incr ) .pt/y LDZ #01 + .pt/y STZ
+		( incr ) .Screen/y DEI2 #0008 ++ .Screen/y DEO2
+		.pt/y LDZ #02 LTH ;&tiles-ver JCN2
+
+RTN
+
+@draw-blendview ( -- )
+	
+	.settings/tile LDZ2 .Screen/addr DEO2
+	#00 #10
+	&loop
+		OVR #04 MOD #00 SWP #0008 ** .blendview/x1 LDZ2 ++ .Screen/x DEO2
+		OVR #04 DIV #00 SWP #0008 ** .blendview/y1 LDZ2 ++ .Screen/y DEO2
+		#20 .Screen/color DEO
+		OVR #20 + .settings/depth LDZ #20 MUL + .Screen/color DEO
+		SWP #01 + SWP
+		DUP2 LTH ,&loop JCN
+	POP2
+	.blendview/x1 LDZ2 .Screen/x DEO2
+	.blendview/y2 LDZ2 #0001 ++ .Screen/y DEO2
+	( get blending ) .settings/blending LDZ
+	( get depth ) .settings/depth LDZ #20 MUL
+	( draw ) #20 + + #21 ;draw-byte JSR2
+
+RTN
+
+@draw-colorview ( -- )
+
+	.colorview/x1 LDZ2 .Screen/x DEO2
+	;circle_icns .Screen/addr DEO2
+
+	#00 #04
+	&loop
+		OVR .settings/brush LDZ EQU #00 SWP #0008 ** ;circle_icns ++ .Screen/addr DEO2
+		OVR .colorview/y1 LDZ2 ROT #00 SWP #0008 ** ++ .Screen/y DEO2
+		OVR #20 + .Screen/color DEO
+		SWP #01 + SWP
+		DUP2 LTH ,&loop JCN
+	POP2
+
+	.colorview/y1 LDZ2 #18 + .Screen/y DEO2
+	.colorview/x1 LDZ2 #08 + .Screen/x DEO2
+	.System/r DEI2 ,&draw-color-code JSR
+	.colorview/y1 LDZ2 #18 + .Screen/y DEO2
+	.colorview/x1 LDZ2 #10 + .Screen/x DEO2
+	.System/g DEI2 ,&draw-color-code JSR
+	.colorview/y1 LDZ2 #18 + .Screen/y DEO2
+	.colorview/x1 LDZ2 #18 + .Screen/x DEO2
+	.System/b DEI2 ,&draw-color-code JSR
+
+	RTN
+
+	&draw-color-code ( color* -- )
+		DUP ;font-hex ROT #0f AND #08 MUL #00 SWP ++ .Screen/addr DEO2
+		( draw ) #22 .Screen/color DEO
+		.colorview/y1 LDZ2 #10 + .Screen/y DEO2
+		;font-hex ROT #04 SFT #08 MUL #00 SWP ++ .Screen/addr DEO2
+		( draw ) #22 .Screen/color DEO
+		.colorview/y1 LDZ2 #08 + .Screen/y DEO2
+		DUP ;font-hex ROT #0f AND #08 MUL #00 SWP ++ .Screen/addr DEO2
+		( draw ) #22 .Screen/color DEO
+		.colorview/y1 LDZ2 .Screen/y DEO2
+		;font-hex ROT #04 SFT #08 MUL #00 SWP ++ .Screen/addr DEO2
+		( draw ) #22 .Screen/color DEO
+	RTN
+
+RTN
+
+@draw-preview ( -- )
+
+	( stash address )
+	.settings/tile LDZ2 DUP2 STH2 .Screen/addr DEO2
+	#00 #04
+	&ver
+		OVR #08 MUL TOS .preview/y1 LDZ2 ++ .Screen/y DEO2
+		#00 #04
+		&hor
+			OVR #08 MUL TOS .preview/x1 LDZ2 ++ .Screen/x DEO2
+			( get x,y )
+			SWP2 OVR STH SWP2 OVR STHr
+			( check if within ratio )
+			.settings/ratio LDZ #0f AND LTH STH
+			.settings/ratio LDZ #04 SFT LTH STHr
+			#0101 !! ,&outside JCN 
+				( get tile ) DUP2r STH2r .Screen/addr DEO2
+				( get blending ) .settings/blending LDZ
+				( get depth ) .settings/depth LDZ #20 MUL
+				( draw ) #20 + + .Screen/color DEO
+				( incr ) STH2r #0008 [ .settings/depth LDZ #08 MUL TOS ++ ] ++ STH2
+				,&resume JMP
+			&outside
+			;halftone_icn .Screen/addr DEO2
+			#23 .Screen/color DEO
+			&resume
+			( incr ) SWP #01 + SWP
+			DUP2 LTH ,&hor JCN
+		POP2
+		( incr ) SWP #01 + SWP
+		DUP2 LTH ;&ver JCN2
+	POP2
+	POP2r
+	.preview/x1 LDZ2 #0001 -- .Screen/x DEO2
+	.preview/y2 LDZ2 #0001 ++ .Screen/y DEO2
+	.settings/ratio LDZ #23 ;draw-byte JSR2
+
+RTN
+
+@draw-cursor ( -- )
+
+	( clear last cursor )
+	.mouse/x LDZ2 .Screen/x DEO2
+	.mouse/y LDZ2 .Screen/y DEO2
+	#30 .Screen/color DEO
+
+	( record mouse positions )
+	.Mouse/x DEI2 .mouse/x STZ2
+	.Mouse/y DEI2 .mouse/y STZ2
+
+	( draw new cursor )
+	.mouse/x LDZ2 .Screen/x DEO2
+	.mouse/y LDZ2 .Screen/y DEO2
+	;tool_selector #00 .bankview/mode LDZ #08 MUL ++ .Screen/addr DEO2
+	#32 .Mouse/state DEI #00 NEQ + .Screen/color DEO
+
+RTN
+
+@draw-byte ( byte color -- )
+	
+	STH STH
+	;font-hex #00 DUPr STHr #f0 AND #04 SFT #08 MUL ++ .Screen/addr DEO2
+	( draw ) OVRr STHr .Screen/color DEO
+	.Screen/x DEI2 #0008 ++ .Screen/x DEO2
+	;font-hex #00 STHr #0f AND #08 MUL ++ .Screen/addr DEO2
+	( draw ) STHr .Screen/color DEO
+
+RTN
+
+@draw-short ( short* color -- )
+
+	STH SWP 
+	DUP #04 SFT TOS #0008 ** ;font-hex ++ .Screen/addr DEO2
+	( draw ) DUPr STHr .Screen/color DEO
+	#0f AND TOS #0008 ** ;font-hex ++ .Screen/addr DEO2
+	.Screen/x DEI2 #0008 ++ .Screen/x DEO2
+	( draw ) DUPr STHr .Screen/color DEO
+	DUP #04 SFT TOS #0008 ** ;font-hex ++ .Screen/addr DEO2
+	.Screen/x DEI2 #0008 ++ .Screen/x DEO2
+	( draw ) DUPr STHr .Screen/color DEO
+	#0f AND TOS #0008 ** ;font-hex ++ .Screen/addr DEO2
+	.Screen/x DEI2 #0008 ++ .Screen/x DEO2
+	( draw ) STHr .Screen/color DEO
+
+RTN
+
+( Utils )
+
+@line-rect ( x1* y1* x2* y2* color -- )
+
+	( load ) .color STZ DUP2 STH2 .rect/y2 STZ2 .rect/x2 STZ2 DUP2 STH2 .rect/y1 STZ2 .rect/x1 STZ2
+	STH2r STH2r
+	&ver
+		( save ) OVR2 .Screen/y DEO2
+		( draw ) .rect/x1 LDZ2 .Screen/x DEO2 .color LDZ DUP .Screen/color DEO
+		( draw ) .rect/x2 LDZ2 .Screen/x DEO2 .Screen/color DEO
+		( incr ) SWP2 #0001 ++ SWP2
+		OVR2 OVR2 LTS2 ,&ver JCN
+	POP2 POP2
+	.rect/x1 LDZ2 .rect/x2 LDZ2
+	&hor
+		( save ) OVR2 .Screen/x DEO2
+		( draw ) .rect/y1 LDZ2 .Screen/y DEO2 .color LDZ DUP .Screen/color DEO
+		( draw ) .rect/y2 LDZ2 .Screen/y DEO2 .Screen/color DEO
+		( incr ) SWP2 #0001 ++ SWP2
+		OVR2 OVR2 #0001 ++ LTS2 ,&hor JCN
+	POP2 POP2
+
+RTN
+
+@fill-rect ( x1* y1* x2* y2* color -- )
+	
+	.color STZ
+	( x1 x2 y1 y2 ) ROT2 SWP2
+	&ver
+		( save ) OVR2 .Screen/y DEO2
+		STH2 STH2 OVR2 OVR2
+		&hor
+			( save ) OVR2 .Screen/x DEO2
+			( draw ) .color LDZ .Screen/color DEO
+			( incr ) SWP2 #0001 ++ SWP2
+			OVR2 OVR2 LTS2 ,&hor JCN
+		POP2 POP2 STH2r STH2r
+		( incr ) SWP2 #0001 ++ SWP2
+		OVR2 OVR2 LTS2 ,&ver JCN
+	POP2 POP2 POP2 POP2
+
+RTN
+
+@line-hor ( x0* x1* y* color -- )
+	
+	STH .Screen/y DEO2
+	&loop
+		( save ) OVR2 .Screen/x DEO2
+		( draw ) DUPr STHr .Screen/color DEO
+		( incr ) SWP2 #0002 ++ SWP2
+		OVR2 OVR2 << ,&loop JCN
+	POP2 POP2 POPr
+
+RTN
+
+@line-ver ( x* y0* y1* color -- )
+	
+	STH ROT2 .Screen/x DEO2
+	&loop
+		( save ) OVR2 .Screen/y DEO2
+		( draw ) DUPr STHr .Screen/color DEO
+		( incr ) SWP2 #0002 ++ SWP2
+		OVR2 OVR2 << ,&loop JCN
+	POP2 POP2 POPr
+
+RTN
+
+@tool_selector 80c0 e0f0 f8e0 1000
+@tool_hand     2020 20b8 7c7c 3838
+@tool_eraser   2050 b87c 3e1c 0800
+@moveup_icn    0010 387c fe10 1000
+@movedown_icn  0010 1010 fe7c 3810
+@halftone_icn  aa55 aa55 aa55 aa55
+
+@circle_icns
+	0038 7cfe fefe 7c38 ( full )
+	0038 4482 8282 4438 ( line )
+@eye_icns
+	0038 4492 2810 0000 ( open )
+	0000 0082 4438 0000 ( closed )
+@blank_icn
+	0000 0000 0000 0000
+	7cfe fefe fefe 7c00
+@depth_icns 
+	00fe 8282 fe82 82fe
+	00fe 9292 fe92 92fe
+@font-hex
+	007c 8282 8282 827c 0030 1010 1010 1010
+	007c 8202 7c80 80fe 007c 8202 1c02 827c
+	000c 1424 4484 fe04 00fe 8080 7c02 827c
+	007c 8280 fc82 827c 007c 8202 1e02 0202
+	007c 8282 7c82 827c 007c 8282 7e02 827c
+	007c 8202 7e82 827e 00fc 8282 fc82 82fc
+	007c 8280 8080 827c 00fc 8282 8282 82fc
+	007c 8280 f080 827c 007c 8280 f080 8080 
+
+@filepath1   [ "projects/fonts/specter8.bit 00 ]
+@filepath2   [ "projects/pictures/cyr10x8.chr 00 ]
+@filepath3   [ "projects/pictures/zerotwo10x10.chr 00 ]
+@filepath4   [ "projects/fonts/katahira8.bit 00 ]
+@filepath5   [ "projects/pictures/ako10x10.chr 00 ]
+@filepath6   [ "projects/pictures/logo1x1.bit 00 ]
+