diff --git a/projects/examples/gui/monospace.tal b/projects/examples/gui/monospace.tal
new file mode 100644
index 0000000..65522af
--- /dev/null
+++ b/projects/examples/gui/monospace.tal
@@ -0,0 +1,155 @@
+( Draw a 8x8 font )
+
+%+  { ADD }  %-  { SUB }  %*  { MUL }  %/  { DIV }
+%<  { LTH }  %>  { GTH }  %=  { EQU }  %!  { NEQ }
+%++ { ADD2 } %-- { SUB2 } %** { MUL2 } %// { DIV2 }
+%<< { LTH2 } %>> { GTH2 } %== { EQU2 } %!! { NEQ2 }
+
+%AUTO-X      { #01 .Screen/auto DEO }
+
+( devices )
+
+|00 @System     &vector $2 &wst      $1 &rst    $1 &eaddr  $2 &ecode  $1 &pad     $1 &r       $2 &g      $2 &b     $2 &debug  $1 &halt $1
+|20 @Screen     &vector $2 &width    $2 &height $2 &auto   $1 &pad    $1 &x       $2 &y       $2 &addr   $2 &pixel $1 &sprite $1
+
+( variables )
+
+|0000
+
+( program )
+
+|0100
+	
+	( theme ) 
+	#f05d .System/r DEO2 
+	#f0cd .System/g DEO2 
+	#f0ad .System/b DEO2
+
+	( draw hello world )
+	#0010 .Screen/x DEO2
+	#0010 .Screen/y DEO2
+	;hello-txt #01 ;draw-uf1 JSR2
+
+	( draw long text )
+	#0010 .Screen/x DEO2
+	#0030 .Screen/y DEO2
+	;long-txt #02 ;draw-uf1-linebreaks JSR2
+
+BRK
+
+@draw-uf1 ( string* color -- )
+
+	AUTO-X
+	STH
+	&while
+		( get sprite ) LDAk #20 - #00 SWP #30 SFT2 ;font ++ .Screen/addr DEO2
+		( draw ) STHkr .Screen/sprite DEO
+		INC2 LDAk ,&while JCN
+	POPr
+
+JMP2r
+
+@draw-uf1-linebreaks ( string* color -- )
+
+	.Screen/x DEI2 ,&anchor STR2
+	AUTO-X
+	STH
+	&while
+		LDAk #0a ! ,&no-lb JCN
+			( rewind ) LIT2 &anchor $2 .Screen/x DEO2
+			( skip line ) .Screen/y DEI2k #0008 ++ ROT DEO2
+			,&end JMP
+			&no-lb
+		( get sprite ) LDAk #20 - #00 SWP #30 SFT2 ;font ++ .Screen/addr DEO2
+		( draw ) STHkr .Screen/sprite DEO
+		&end
+		INC2 LDAk ,&while JCN
+	POPr
+
+JMP2r
+
+@hello-txt "Hello 20 "Uxn! $1
+
+@long-txt
+	5275 7374 6963 2043 6f6d 7075 7469 6e67
+	2072 6566 6572 7320 746f 2074 6865 2063
+	6f6e 7374 7275 6374 696f 6e20 0a6f 6620
+	6361 6c63 756c 6174 696f 6e20 6d61 6368
+	696e 6573 2075 7369 6e67 2070 7265 2d69
+	6e64 7573 7472 6961 6c20 0a6f 7220 6576
+	656e 2070 7265 2d68 6973 746f 7269 6320
+	7465 6368 6e6f 6c6f 6779 2e20 0a0a 4974
+	2072 6576 6561 6c73 2061 2068 6973 746f
+	7279 206f 6620 636f 6d70 7574 696e 6720
+	6173 2074 6865 200a 7061 7374 696d 6520
+	6f66 2064 696c 6574 7461 6e74 6573 2c20
+	616d 6174 6575 7220 7363 6965 6e74 6973
+	7473 0a61 6e64 2074 6162 756c 6174 6f72
+	7320 7768 6f20 636f 6e73 7472 7563 7420
+	6d61 6368 696e 6573 2074 6f20 0a6d 616e
+	6970 756c 6174 6520 6162 7374 7261 6374
+	2073 796d 626f 6c73 2077 6974 6820 6e6f
+	2070 7261 6374 6963 616c 200a 6170 706c
+	6963 6174 696f 6e2e 2041 7320 7468 6573
+	6520 6d61 6368 696e 6573 2061 7265 2067
+	656e 6572 616c 6c79 200a 6c65 7373 2065
+	6666 6963 6965 6e74 2074 6861 6e20 636f
+	6e76 656e 7469 6f6e 616c 2070 656e 6369
+	6c20 616e 6420 0a70 6170 6572 2063 6f6d
+	7075 7461 7469 6f6e 2c20 7468 6579 2061
+	6c6c 7564 6520 746f 2061 206d 6f72 6520
+	0a65 7069 6375 7265 616e 2070 7261 6374
+	6963 6520 6f66 2063 6f6d 7075 7469 6e67
+	2066 6f72 2070 6c65 6173 7572 6520 0a72
+	6174 6865 7220 7468 616e 2070 726f 6475
+	6374 696f 6e2e 
+
+@font ( bbcmicro )
+	0000 0000 0000 0000 1818 1818 1800 1800
+	6c6c 6c00 0000 0000 3636 7f36 7f36 3600
+	0c3f 683e 0b7e 1800 6066 0c18 3066 0600
+	386c 6c38 6d66 3b00 0c18 3000 0000 0000
+	0c18 3030 3018 0c00 3018 0c0c 0c18 3000
+	0018 7e3c 7e18 0000 0018 187e 1818 0000
+	0000 0000 0018 1830 0000 007e 0000 0000
+	0000 0000 0018 1800 0006 0c18 3060 0000
+	3c66 6e7e 7666 3c00 1838 1818 1818 7e00
+	3c66 060c 1830 7e00 3c66 061c 0666 3c00
+	0c1c 3c6c 7e0c 0c00 7e60 7c06 0666 3c00
+	1c30 607c 6666 3c00 7e06 0c18 3030 3000
+	3c66 663c 6666 3c00 3c66 663e 060c 3800
+	0000 1818 0018 1800 0000 1818 0018 1830
+	0c18 3060 3018 0c00 0000 7e00 7e00 0000
+	3018 0c06 0c18 3000 3c66 0c18 1800 1800
+	3c66 6e6a 6e60 3c00 3c66 667e 6666 6600
+	7c66 667c 6666 7c00 3c66 6060 6066 3c00
+	786c 6666 666c 7800 7e60 607c 6060 7e00
+	7e60 607c 6060 6000 3c66 606e 6666 3c00
+	6666 667e 6666 6600 7e18 1818 1818 7e00
+	3e0c 0c0c 0c6c 3800 666c 7870 786c 6600
+	6060 6060 6060 7e00 6377 7f6b 6b63 6300
+	6666 767e 6e66 6600 3c66 6666 6666 3c00
+	7c66 667c 6060 6000 3c66 6666 6a6c 3600
+	7c66 667c 6c66 6600 3c66 603c 0666 3c00
+	7e18 1818 1818 1800 6666 6666 6666 3c00
+	6666 6666 663c 1800 6363 6b6b 7f77 6300
+	6666 3c18 3c66 6600 6666 663c 1818 1800
+	7e06 0c18 3060 7e00 7c60 6060 6060 7c00
+	0060 3018 0c06 0000 3e06 0606 0606 3e00
+	183c 6642 0000 0000 0000 0000 0000 00ff
+	1c36 307c 3030 7e00 0000 3c06 3e66 3e00
+	6060 7c66 6666 7c00 0000 3c66 6066 3c00
+	0606 3e66 6666 3e00 0000 3c66 7e60 3c00
+	1c30 307c 3030 3000 0000 3e66 663e 063c
+	6060 7c66 6666 6600 1800 3818 1818 3c00
+	1800 3818 1818 1870 6060 666c 786c 6600
+	3818 1818 1818 3c00 0000 367f 6b6b 6300
+	0000 7c66 6666 6600 0000 3c66 6666 3c00
+	0000 7c66 667c 6060 0000 3e66 663e 0607
+	0000 6c76 6060 6000 0000 3e60 3c06 7c00
+	3030 7c30 3030 1c00 0000 6666 6666 3e00
+	0000 6666 663c 1800 0000 636b 6b7f 3600
+	0000 663c 183c 6600 0000 6666 663e 063c
+	0000 7e0c 1830 7e00 0c18 1870 1818 0c00
+	1818 1800 1818 1800 3018 180e 1818 3000
+	316b 4600 0000 0000 ffff ffff ffff ffff
diff --git a/src/devices/system.c b/src/devices/system.c
index 42ad4ad..1b46994 100644
--- a/src/devices/system.c
+++ b/src/devices/system.c
@@ -23,19 +23,22 @@ static const char *errors[] = {
 	"Return-stack division by zero"};
 
 static void
-print_stack(Stack *s, char *name)
+system_print(Stack *s, char *name)
 {
-	Uint8 x, y;
-	fprintf(stderr, "\n%s\n", name);
-	for(y = 0; y < 0x04; y++) {
-		for(x = 0; x < 0x08; x++) {
-			Uint8 p = y * 0x08 + x;
-			fprintf(stderr,
-				p == s->ptr ? "[%02x]" : " %02x ",
-				s->dat[p]);
-		}
-		fprintf(stderr, "\n");
-	}
+	Uint8 i;
+	fprintf(stderr, "<%s> ", name);
+	for(i = 0; i < s->ptr; i++)
+		fprintf(stderr, i == s->ptr ? "[%02x]" : " %02x ", s->dat[i]);
+	if(!i)
+		fprintf(stderr, "empty");
+	fprintf(stderr, "\n");
+}
+
+void
+system_inspect(Uxn *u)
+{
+	system_print(&u->wst, "wst");
+	system_print(&u->rst, "rst");
 }
 
 int
@@ -53,16 +56,11 @@ uxn_halt(Uxn *u, Uint8 error, Uint16 addr)
 			vec += 0x0004;
 		return uxn_eval(u, vec);
 	}
+	system_inspect(u);
 	fprintf(stderr, "Halted: %s#%04x, at 0x%04x\n", errors[error], u->ram[addr], addr);
 	return 0;
 }
 
-void
-system_inspect(Uxn *u){
-	print_stack(&u->wst, "Working-stack");
-	print_stack(&u->rst, "Return-stack");
-}
-
 /* IO */
 
 Uint8
diff --git a/src/devices/system.h b/src/devices/system.h
index 114d2d1..6bdc847 100644
--- a/src/devices/system.h
+++ b/src/devices/system.h
@@ -15,6 +15,7 @@ typedef struct SystemDevice {
 } SystemDevice;
 
 void system_inspect(Uxn *u);
+
 Uint8 system_dei(Device *d, Uint8 port);
 void system_deo(Device *d, Uint8 port);
 void system_deo_special(Device *d, Uint8 port);
diff --git a/src/uxncli.c b/src/uxncli.c
index f3af6f0..867cdb2 100644
--- a/src/uxncli.c
+++ b/src/uxncli.c
@@ -34,7 +34,6 @@ error(char *msg, const char *err)
 void
 system_deo_special(Device *d, Uint8 port)
 {
-	
 }
 
 static void
diff --git a/src/uxnemu.c b/src/uxnemu.c
index 3ccfe32..7cbc100 100644
--- a/src/uxnemu.c
+++ b/src/uxnemu.c
@@ -42,7 +42,7 @@ static SDL_Rect gRect;
 
 /* devices */
 
-static Device *devsystem, *devscreen, *devmouse, *devctrl, *devaudio0;
+static Device *devscreen, *devmouse, *devctrl, *devaudio0;
 static Uint8 zoom = 1;
 static Uint32 stdin_event, audio0_event;
 
@@ -292,13 +292,6 @@ set_zoom(Uint8 scale)
 	set_window_size(gWindow, (uxn_screen.width + PAD * 2) * zoom, (uxn_screen.height + PAD * 2) * zoom);
 }
 
-static void
-toggle_debugger(void)
-{
-	devsystem->dat[0xe] = !devsystem->dat[0xe];
-	screen_clear(&uxn_screen, &uxn_screen.fg);
-}
-
 static void
 capture_screen(void)
 {
@@ -390,8 +383,9 @@ console_input(Uxn *u, char c)
 static int
 run(Uxn *u)
 {
+	Device *devsys = &u->dev[0];
 	redraw();
-	while(!devsystem->dat[0xf]) {
+	while(!devsys->dat[0xf]) {
 		SDL_Event event;
 		double elapsed, begin;
 		if(!BENCH)
@@ -454,7 +448,7 @@ run(Uxn *u)
 				console_input(u, event.cbutton.button);
 		}
 		uxn_eval(u, GETVECTOR(devscreen));
-		if(uxn_screen.fg.changed || uxn_screen.bg.changed || devsystem->dat[0xe])
+		if(uxn_screen.fg.changed || uxn_screen.bg.changed)
 			redraw();
 		if(!BENCH) {
 			elapsed = (SDL_GetPerformanceCounter() - begin) / (double)SDL_GetPerformanceFrequency() * 1000.0f;