diff --git a/etc/opctest.tal b/etc/opctest.tal
index ddad5c5..f8d38a4 100644
--- a/etc/opctest.tal
+++ b/etc/opctest.tal
@@ -1,4 +1,5 @@
 ( Opcode Tester )
+( Source: https://git.sr.ht/~rabbits/uxn-utils/tree/main/item/cli/opctest/opctest.tal )
 
 |0013
 
@@ -10,7 +11,7 @@
 		> LIT2: Puts a short on the stack
 		> #18 DEO: Write a letter in terminal )
 
-	LIT2 "kO #18 DEO #18 DEO #0a18 DEO
+	[ LIT2 "kO ] #18 DEO #18 DEO #0a18 DEO
 
 	( part 2
 		> LITr: Put a byte on return stack
@@ -18,14 +19,14 @@
 		> STH: Move a byte from working stack to return stack
 		> STH2r: Move a short from return stack to working stack )
 
-	LITr "k LIT "O STH STH2r #18 DEO #18 DEO #0a18 DEO
+	[ LITr "k ] [ LIT "O ] STH STH2r #18 DEO #18 DEO #0a18 DEO
 
 	( part 3
 		> LIT2r: Put a short on return stack
 		> DUP: Duplicate byte
 		> ADDr: Add bytes on return stack )
 
-	LIT2r "k 4d #01 DUP STH ADDr STH ADDr STH2r #18 DEO #18 DEO #0a18 DEO
+	[ LIT2r "k 4d ] #01 DUP STH ADDr STH ADDr STH2r #18 DEO #18 DEO #0a18 DEO
 
 	( part 4
 		> JSI: Subroutine to relative absolute address
@@ -46,7 +47,7 @@
 		> LDA2k: Non-destructive load short from absolute address
 		> STA2: Store short at absolute address )
 
-	LIT2r 0000
+	[ LIT2r 0000 ]
 	;tests/end ;tests
 	&l
 		run-test STH ADDr
@@ -56,7 +57,7 @@
 
 	( halt )
 
-	#010f DEO
+	#800f DEO
 
 BRK
 
@@ -64,7 +65,7 @@ BRK
 
 	LDA2k JSR2 DUP ?&pass
 		;Dict/failed pstr
-		[ LIT2 &name $2 ] pstr #0a18 DEO JMP2r
+		[ LIT2 &name $2 ] pstr/ #0a18 DEO JMP2r
 		&pass
 
 JMP2r
@@ -77,8 +78,9 @@ JMP2r
 
 @pstr ( str* -- )
 
-	LDAk ?&w POP2 JMP2r
-	&w LDAk #18 DEO INC2 LDAk ?&w
+	&w ( -- )
+		LDAk #18 DEO
+		INC2 & LDAk ?&w
 	POP2
 
 JMP2r
@@ -106,8 +108,8 @@ JMP2r
 	=op-mul/a =op-mul/b =op-mul/c =op-mul/d
 	=op-mul/e =op-mul/f =op-mul/g =op-mul/h ]
 =op-div [
-	=op-div/a =op-div/b =op-div/c =op-div/d
-	=op-div/e =op-div/f =op-div/g =op-div/h ]
+	=op-div/a =op-div/b =op-div/c =op-div/d =op-div/e
+	=op-div/f =op-div/g =op-div/h =op-div/i =op-div/j ]
 =op-inc [
 	=op-inc/a =op-inc/b =op-inc/c =op-inc/d
 	=op-inc/e =op-inc/f =op-inc/g =op-inc/h ]
@@ -226,10 +228,12 @@ JMP2r
 	&b #20 #20 DIV [ #01 ] EQU JMP2r
 	&c #34 #01 DIV [ #34 ] EQU JMP2r
 	&d #02 #ef DIV [ #00 ] EQU JMP2r
-	&e #1000 #0040 DIV2 [ #0040 ] EQU2 JMP2r
-	&f #abcd #1234 DIV2 [ #0009 ] EQU2 JMP2r
-	&g #8000 #0200 DIV2 [ #0040 ] EQU2 JMP2r
-	&h #2222 #0003 DIV2 [ #0b60 ] EQU2 JMP2r
+	&e #02 #00 DIV [ #00 ] EQU JMP2r
+	&f #1000 #0040 DIV2 [ #0040 ] EQU2 JMP2r
+	&g #abcd #1234 DIV2 [ #0009 ] EQU2 JMP2r
+	&h #8000 #0200 DIV2 [ #0040 ] EQU2 JMP2r
+	&i #2222 #0003 DIV2 [ #0b60 ] EQU2 JMP2r
+	&j #0202 #0000 DIV2 [ #0000 ] EQU2 JMP2r
 @op-inc ;Dict/inc !set
 	&a #01 INC [ #02 ] EQU JMP2r
 	&b #ff INC [ #00 ] EQU JMP2r
@@ -346,16 +350,15 @@ JMP2r
 
 @special ( routine* -- f )
 
-	( test the stack order )
+	( test that the stack order is LIFO )
 	DUP2 STH2kr EQU2
 	ROT ROT DUP2r STHr STHr SWP EQU2 AND
 
 JMP2r
 
 @routine ( a b -- c ) ADD JMP2r
-@subroutine ( -- ) LIT2 "kO #18 DEO #18 DEO #0a18 DEO JMP2r
+@subroutine ( -- ) [ LIT2 "kO ] #18 DEO #18 DEO #0a18 DEO JMP2r
 @Absolute &byte $1 &short $2
-@phex ( short* -- ) SWP phex/b &b ( byte -- ) DUP #04 SFT phex/c &c ( char -- ) #0f AND DUP #09 GTH #27 MUL ADD #30 ADD #18 DEO JMP2r
 
 @Dict [
 	&ok "Ok $1
diff --git a/etc/polycat.tal b/etc/polycat.tal
index ed6ca35..a661ce4 100644
--- a/etc/polycat.tal
+++ b/etc/polycat.tal
@@ -38,10 +38,7 @@
 	#05 .Screen/auto DEO
 	draw-polycat
 
-	;&mmu #02 DEO2
-
 BRK
-	&mmu 01 1234 4567 789a 2345 6789
 
 @draw-polycat ( -- )
 
@@ -69,6 +66,7 @@ JMP2r
 	.cat/timer LDZ INC [ DUP ] .cat/timer STZ
 		#04 SFT draw-tail
 	draw-cursor
+	.Mouse/state DEI #00 EQU ?{ #ff #00 .Mouse/state DEO }
 
 BRK
 
diff --git a/src/devices/screen.c b/src/devices/screen.c
index 5e6270b..f0b58aa 100644
--- a/src/devices/screen.c
+++ b/src/devices/screen.c
@@ -76,15 +76,17 @@ static Uint8 icons[] = {
 	0x82, 0x7e, 0x02, 0x82, 0x7c, 0x00, 0x7c, 0x82, 0x02, 0x7e, 0x82, 0x82, 0x7e, 0x00, 0xfc, 
 	0x82, 0x82, 0xfc, 0x82, 0x82, 0xfc, 0x00, 0x7c, 0x82, 0x80, 0x80, 0x80, 0x82, 0x7c, 0x00, 
 	0xfc, 0x82, 0x82, 0x82, 0x82, 0x82, 0xfc, 0x00, 0x7c, 0x82, 0x80, 0xf0, 0x80, 0x82, 0x7c,
-	0x00, 0x7c, 0x82, 0x80, 0xf0, 0x80, 0x80, 0x80};
+	0x00, 0x7c, 0x82, 0x80, 0xf0, 0x80, 0x80, 0x80 };
+static Uint8 arrow[] = {
+	0x00, 0x00, 0x00, 0xfe, 0x7c, 0x38, 0x10, 0x00 };
 
 /* clang-format on */
 
 static void
-draw_byte(Uint8 v, Uint16 x, Uint16 y, Uint8 color)
+draw_byte(Uint8 b, Uint16 x, Uint16 y, Uint8 color)
 {
-	screen_blit(uxn_screen.fg, icons, v >> 4 << 3, x, y, color, 0, 0, 0);
-	screen_blit(uxn_screen.fg, icons, (v & 0xf) << 3, x + 8, y, color, 0, 0, 0);
+	screen_blit(uxn_screen.fg, icons, (b >> 4) << 3, x, y, color, 0, 0, 0);
+	screen_blit(uxn_screen.fg, icons, (b & 0xf) << 3, x + 8, y, color, 0, 0, 0);
 	screen_change(x, y, x + 0x10, y + 0x8);
 }
 
@@ -92,10 +94,19 @@ static void
 screen_debugger(Uxn *u)
 {
 	int i;
-	for(i = 0; i < u->wst.ptr; i++)
-		draw_byte(u->wst.dat[i], i * 0x18 + 0x8, uxn_screen.height - 0x18, 0x2);
-	for(i = 0; i < u->rst.ptr; i++)
-		draw_byte(u->rst.dat[i], i * 0x18 + 0x8, uxn_screen.height - 0x10, 0x3);
+	for(i = 0; i < 0x08; i++) {
+		Uint8 pos = u->wst.ptr - 4 + i;
+		draw_byte(u->wst.dat[pos], i * 0x18 + 0x8, uxn_screen.height - 0x18, i > 4 ? 0x01 : !pos ? 0xc :
+				i == 4                                                                           ? 0x8 :
+                                                                                                   0x2);
+	}
+	for(i = 0; i < 0x08; i++) {
+		Uint8 pos = u->rst.ptr - 4 + i;
+		draw_byte(u->rst.dat[pos], i * 0x18 + 0x8, uxn_screen.height - 0x10, i > 4 ? 0x01 : !pos ? 0xc :
+				i == 4                                                                           ? 0x8 :
+                                                                                                   0x2);
+	}
+	screen_blit(uxn_screen.fg, arrow, 0, 0x68, uxn_screen.height - 0x20, 3, 0, 0, 0);
 	for(i = 0; i < 0x40; i++)
 		draw_byte(u->ram[i], (i & 0x7) * 0x18 + 0x8, ((i >> 3) << 3) + 0x8, 1 + !!u->ram[i]);
 }
diff --git a/src/devices/system.c b/src/devices/system.c
index aba1e13..7491572 100644
--- a/src/devices/system.c
+++ b/src/devices/system.c
@@ -16,8 +16,7 @@ WITH REGARD TO THIS SOFTWARE.
 */
 
 char *boot_rom;
-Uint8 dei_masks[0x100], deo_masks[0x100];
-Uint16 dev_vers[0x10], dei_mask[0x10], deo_mask[0x10];
+Uint16 dev_vers[0x10];
 
 static int
 system_load(Uxn *u, char *filename)
@@ -60,28 +59,10 @@ system_inspect(Uxn *u)
 	system_print(&u->rst, "rst");
 }
 
-void
-system_connect(Uint8 device, Uint8 ver, Uint16 dei, Uint16 deo)
-{
-	int i, d = (device << 0x4);
-	for(i = 0; i < 0x10; i++) {
-		dei_masks[d + i] = (dei >> i) & 0x1;
-		deo_masks[d + i] = (deo >> i) & 0x1;
-	}
-	dev_vers[device] = ver;
-	dei_mask[device] = dei;
-	deo_mask[device] = deo;
-}
-
 int
 system_version(char *name, char *date)
 {
-	int i;
 	printf("%s, %s.\n", name, date);
-	printf("Device Version Dei  Deo\n");
-	for(i = 0; i < 0x10; i++)
-		if(dev_vers[i])
-			printf("%6x %7d %04x %04x\n", i, dev_vers[i], dei_mask[i], deo_mask[i]);
 	return 0;
 }
 
diff --git a/src/devices/system.h b/src/devices/system.h
index 7c79516..227e8b7 100644
--- a/src/devices/system.h
+++ b/src/devices/system.h
@@ -17,7 +17,6 @@ WITH REGARD TO THIS SOFTWARE.
 
 extern char *boot_rom;
 
-void system_connect(Uint8 device, Uint8 ver, Uint16 dei, Uint16 deo);
 void system_reboot(Uxn *u, char *rom, int soft);
 void system_inspect(Uxn *u);
 int system_version(char *emulator, char *date);
diff --git a/src/uxn.c b/src/uxn.c
index af1b4da..d153d30 100644
--- a/src/uxn.c
+++ b/src/uxn.c
@@ -13,21 +13,21 @@ WITH REGARD TO THIS SOFTWARE.
 
 #define FLIP       { s = ins & 0x40 ? &u->wst : &u->rst; }
 #define JUMP(x)    { if(m2) pc = (x); else pc += (Sint8)(x); }
-#define POKE(x, y) { if(m2) { POKE2(ram + x, y) } else ram[(x)] = (y); }
-#define PEEK(o, x) { if(m2) { o = PEEK2(ram + x); } else o = ram[(x)]; }
-#define DEVR(o, p) { if(m2) { o = ((emu_dei(u, p) << 8) + emu_dei(u, p + 1)); } else o = emu_dei(u, p); }
+#define POKE(x, y) { if(m2) { tp = &ram[x]; POKE2(tp, y) } else ram[(x)] = (y); }
+#define PEEK(o, x) { if(m2) { tp = &ram[x]; o = PEEK2(tp); } else o = ram[(x)]; }
+#define DEVR(o, p) { if(m2) { o = (emu_dei(u, p) << 8) | emu_dei(u, p + 1); } else o = emu_dei(u, p); }
 #define DEVW(p, y) { if(m2) { emu_deo(u, p, y >> 8); emu_deo(u, p + 1, y); } else emu_deo(u, p, y); }
 #define PUSH1(y)   { s->dat[s->ptr++] = (y); }
-#define PUSH2(y)   { t = (y); s->dat[s->ptr++] = t >> 0x8; s->dat[s->ptr++] = t & 0xff; }
+#define PUSH2(y)   { t = (y); s->dat[s->ptr++] = t >> 0x8; s->dat[s->ptr++] = t; }
 #define PUSHx(y)   { if(m2) { PUSH2(y) } else PUSH1(y) }
 #define POP1(o)    { o = s->dat[--*sp]; }
-#define POP2(o)    { o = s->dat[--*sp] | s->dat[--*sp] << 0x8; }
+#define POP2(o)    { o = s->dat[--*sp] | (s->dat[--*sp] << 0x8); }
 #define POPx(o)    { if(m2) { POP2(o) } else POP1(o) }
 
 int
 uxn_eval(Uxn *u, Uint16 pc)
 {
-	Uint8 ksp, *sp, *ram = u->ram;
+	Uint8 ksp, *sp, *tp, *ram = u->ram;
 	Uint16 a, b, c, t;
 	if(!pc || u->dev[0x0f]) return 0;
 	for(;;) {
diff --git a/src/uxn.h b/src/uxn.h
index 3b3504e..f074312 100644
--- a/src/uxn.h
+++ b/src/uxn.h
@@ -37,8 +37,7 @@ typedef struct Uxn {
 
 extern Uint8 emu_dei(Uxn *u, Uint8 addr);
 extern void emu_deo(Uxn *u, Uint8 addr, Uint8 value);
-extern Uint8 dei_masks[0x100], deo_masks[0x100];
-extern Uint16 dev_vers[0x10], dei_mask[0x10], deo_mask[0x10];
+extern Uint16 dev_vers[0x10];
 
 /* built-ins */
 
diff --git a/src/uxn11.c b/src/uxn11.c
index b0e49e2..895566d 100644
--- a/src/uxn11.c
+++ b/src/uxn11.c
@@ -259,16 +259,6 @@ main(int argc, char **argv)
 	int i = 1;
 	if(i == argc)
 		return system_error("usage", "uxn11 [-v] file.rom [args...]");
-	/* Connect Varvara */
-	system_connect(0x0, SYSTEM_VERSION, SYSTEM_DEIMASK, SYSTEM_DEOMASK);
-	system_connect(0x1, CONSOLE_VERSION, CONSOLE_DEIMASK, CONSOLE_DEOMASK);
-	system_connect(0x2, SCREEN_VERSION, SCREEN_DEIMASK, SCREEN_DEOMASK);
-	system_connect(0x8, CONTROL_VERSION, CONTROL_DEIMASK, CONTROL_DEOMASK);
-	system_connect(0x9, MOUSE_VERSION, MOUSE_DEIMASK, MOUSE_DEOMASK);
-	system_connect(0xa, FILE_VERSION, FILE_DEIMASK, FILE_DEOMASK);
-	system_connect(0xb, FILE_VERSION, FILE_DEIMASK, FILE_DEOMASK);
-	system_connect(0xc, DATETIME_VERSION, DATETIME_DEIMASK, DATETIME_DEOMASK);
-	system_connect(0xf, LINK_VERSION, LINK_DEIMASK, LINK_DEOMASK);
 	/* Read flags */
 	if(argv[i][0] == '-' && argv[i][1] == 'v')
 		return system_version("Uxn11 - Graphical Varvara Emulator", "31 Oct 2023");
diff --git a/src/uxnasm.c b/src/uxnasm.c
index d8f809e..f80d63b 100644
--- a/src/uxnasm.c
+++ b/src/uxnasm.c
@@ -501,17 +501,21 @@ main(int argc, char *argv[])
 	if(argc == 1)
 		return error("usage", "uxnasm [-v] input.tal output.rom");
 	if(argv[1][0] == '-' && argv[1][1] == 'v')
-		return !fprintf(stdout, "Uxnasm - Uxntal Assembler, 8 Aug 2023.\n");
+		return !fprintf(stdout, "Uxnasm - Uxntal Assembler, 27 Oct 2023.\n");
 	if(!(src = fopen(argv[1], "r")))
 		return !error("Invalid input", argv[1]);
 	if(!assemble(src))
 		return !error("Assembly", "Failed to assemble rom.");
-	if(!(dst = fopen(argv[2], "wb")))
+	if(scmp(argv[2], "-", 2))
+		dst = stdout;
+	else if(!(dst = fopen(argv[2], "wb")))
 		return !error("Invalid Output", argv[2]);
 	if(p.length <= TRIM)
 		return !error("Assembly", "Output rom is empty.");
 	fwrite(p.data + TRIM, p.length - TRIM, 1, dst);
-	review(argv[2]);
-	writesym(argv[2]);
+	if(!scmp(argv[2], "-", 2)) {
+		review(argv[2]);
+		writesym(argv[2]);
+	}
 	return 0;
 }
diff --git a/src/uxncli.c b/src/uxncli.c
index fdd56cd..eee1a13 100644
--- a/src/uxncli.c
+++ b/src/uxncli.c
@@ -68,12 +68,6 @@ main(int argc, char **argv)
 	int i = 1;
 	if(i == argc)
 		return system_error("usage", "uxncli [-v] file.rom [args..]");
-	/* Connect Varvara */
-	system_connect(0x0, SYSTEM_VERSION, SYSTEM_DEIMASK, SYSTEM_DEOMASK);
-	system_connect(0x1, CONSOLE_VERSION, CONSOLE_DEIMASK, CONSOLE_DEOMASK);
-	system_connect(0xa, FILE_VERSION, FILE_DEIMASK, FILE_DEOMASK);
-	system_connect(0xb, FILE_VERSION, FILE_DEIMASK, FILE_DEOMASK);
-	system_connect(0xc, DATETIME_VERSION, DATETIME_DEIMASK, DATETIME_DEOMASK);
 	/* Read flags */
 	if(argv[i][0] == '-' && argv[i][1] == 'v')
 		return system_version("Uxncli - Console Varvara Emulator", "30 Oct 2023");