diff --git a/.build.yml b/.build.yml
index 9f4b5f3..4848527 100644
--- a/.build.yml
+++ b/.build.yml
@@ -18,8 +18,8 @@ sources:
     - https://git.sr.ht/~rabbits/uxn
 tasks:
     - prepare: |
-        rm -f out
-        mkdir -p out
+        rm -f out build
+        mkdir -p out build/uxn-lin64 build/uxn-win64 build/uxn-mac64 build/essentials/uxn
         umask 077
         mkdir -p ~/.ssh
         printf '%s\n' "${SSH_HOST_KEYS}" > ~/.ssh/known_hosts
@@ -27,11 +27,8 @@ tasks:
     - build-linux: |
         cd uxn
         ./build.sh --no-run
-        mv bin uxn
-        tar -czf ../out/uxn-linux-amd64.tar.gz uxn
-        cd ..
-    - build-rompack: |
-        mkdir -p rompack/uxn
+        mv bin ../build/uxn-lin64/uxn
+    - build-essentials: |
         for F in uxn/projects/software/calc.tal uxn/projects/software/launcher.tal uxn/projects/examples/demos/piano.tal uxn/projects/examples/demos/clock.tal catclock/src/main.tal dexe/src/main.tal donsol/src/main.tal left/src/main.tal nasu/src/main.tal noodle/src/main.tal orca-toy/src/main.tal:orca.rom turye/src/main.tal; do
             PROJECT="${F%%/*}"
             if [ "${F}" = "${F%:*}" ]; then
@@ -43,17 +40,25 @@ tasks:
                 F="${F%:*}"
             fi
             [ -d "${PROJECT}" ] || git clone "https://git.sr.ht/~rabbits/${PROJECT}"
-            ( cd "${PROJECT}" && ../uxn/uxn/uxnasm "${F#*/}" "../rompack/uxn/${ROMNAME}" || rm -f "../rompack/uxn/${ROMNAME}" )
+            ( cd "${PROJECT}" && ../build/uxn-lin64/uxn/uxnasm "${F#*/}" "../build/essentials/uxn/${ROMNAME}" || rm -f "../build/essentials/uxn/${ROMNAME}" )
         done
-        tar -czf out/uxn-rompack.tar.gz -C rompack uxn
-        ( cd rompack && zip -qr ../out/uxn-rompack.zip uxn )
         [ -e ~/.ssh/id_rsa ] || complete-build
     - build-windows: |
-        ssh win "rm -f uxn-windows-64bit.zip; export PATH=\"\${PATH}:/mingw64/bin\"; set -ex; cd uxn; git fetch; git checkout .; git clean -xfd; git checkout $(cd uxn && git rev-parse HEAD); MSYSTEM=MSYS ./build.sh --no-run; mv bin uxn; zip -qr ../uxn-windows-64bit.zip uxn"
-        rsync win:uxn-windows-64bit.zip out/
+        ssh win "export PATH=\"\${PATH}:/mingw64/bin\"; set -ex; cd uxn; git fetch; git checkout .; git clean -xfd; git checkout $(cd uxn && git rev-parse HEAD); MSYSTEM=MSYS ./build.sh --no-run"
+        rsync -rp win:uxn/bin/ build/uxn-win64/uxn/
     - build-macos: |
-        ssh mac "rm -f uxn-macos.tar.gz; export PATH=\"\${PATH}:/usr/local/bin\"; set -ex; cd uxn; git fetch; git checkout .; git clean -xfd; git checkout $(cd uxn && git rev-parse HEAD); ./build.sh --no-run; mv bin uxn; tar -zcf ../uxn-macos.tar.gz uxn"
-        rsync mac:uxn-macos.tar.gz out/
+        ssh mac "export PATH=\"\${PATH}:/usr/local/bin\"; set -ex; cd uxn; git fetch; git checkout .; git clean -xfd; git checkout $(cd uxn && git rev-parse HEAD); ./build.sh --no-run"
+        rsync -rp mac:uxn/bin/ build/uxn-mac64/uxn/
+    - archive: |
+        for PROJECT in uxn-lin64 uxn-win64 uxn-mac64 essentials; do
+            tar -czf "out/${PROJECT}.tar.gz" -C "build/${PROJECT}" uxn
+            ( cd "build/${PROJECT}" && zip -qr "../../out/${PROJECT}.zip" uxn )
+            if [ "${PROJECT}" != essentials ]; then
+                cp build/essentials/uxn/* "build/${PROJECT}/uxn/"
+                tar -czf "out/uxn-essentials-${PROJECT#uxn-}.tar.gz" -C "build/${PROJECT}" uxn
+                ( cd "build/${PROJECT}" && zip -qr "../../out/uxn-essentials-${PROJECT#uxn-}.zip" uxn )
+            fi
+        done
     - upload: |
         if [ "$(cd uxn && git rev-parse HEAD)" != "$(cd uxn && git rev-parse origin/main)" ]; then exit; fi
         ls -l out
diff --git a/projects/examples/devices/system.debugger.tal b/projects/examples/devices/system.debugger.tal
deleted file mode 100644
index c63cad4..0000000
--- a/projects/examples/devices/system.debugger.tal
+++ /dev/null
@@ -1,16 +0,0 @@
-( 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
-|10 @Console    &vector $2 &read     $1 &pad    $5 &write  $1 &error  $1
-
-( program )
-
-|0100 @Reset ( -> )
-	~projects/library/debugger.tal
-	#0123 #4567 #89ab #cdef
-	LIT2r 1234 LIT2r 5678 LIT2r 9abc LIT2r def0
-	( BREAKPOINT )
-	( LIT2r 0000 DIVr )
-	&loop INCk ,&loop JMP
-	BRK
-
diff --git a/projects/library/debugger.tal b/projects/library/debugger.tal
deleted file mode 100644
index 384eb44..0000000
--- a/projects/library/debugger.tal
+++ /dev/null
@@ -1,181 +0,0 @@
-( in-Uxn debugger )
-
-( To use, include this file just before the BRK in the program reset routine, e.g.:
-
-	|0100 ( -> )
-		( theme )
-		#0fe5 .System/r DEO2
-		#0fc5 .System/g DEO2
-		#0f25 .System/b DEO2
-	~projects/library/debugger.tal
-	BRK
-
-The debugger will catch stack errors that arise after that point.
-
-)
-
-%BREAKPOINT { LIT2r :debug JSR2r }
-
-@debug-start
-;debug-vector .System/vector DEO2
-;debug-end JMP2
-
-@debug ( pc* -- )
-	#0001 SUB2 .System/eaddr DEO2
-	.System/ecode DEIk #07 EOR SWP DEO
-	,debug-vector/main JMP
-
-@debug-vector ( -> )
-	STH STH STH STH ( <- only run in case of working stack overflow )
-	&main
-
-	( flush the working stack )
-	.System/wst DEI ;debug-wst/ptr STA
-	&flush-wst
-	.System/wst DEI #00 EQU ,&end-flush-wst JCN
-	#00 .System/wst DEI #0002 SUB2 ;debug-wst/dat ADD2 STA
-	,&flush-wst JMP
-	&end-flush-wst
-
-	( in case of working stack overflow, we need to append the four return stack bytes )
-	.System/ecode DEI #02 NEQ ,&skip-wst-append JCN
-	#00 ;debug-wst/ptr LDAk ( 00 ptr-hi ptr-lo ptr / ... z y x w )
-		DUP #04 ADD OVR2 STA
-		ROT ROT ADD2 ( start* / ... z y x w )
-		INC2 DUP2 #0004 ADD2 SWP2 ( end* start* / ... z y x w )
-		&loop
-		DUP2 STHr ROT ROT STA
-		INC2
-		GTH2k ,&loop JCN
-		POP2 POP2
-	&skip-wst-append
-
-	( flush the return stack )
-	.System/rst DEI ;debug-rst/ptr STA
-	&flush-rst
-	.System/rst DEI #00 EQU ,&end-flush-rst JCN
-	STHr #00 .System/rst DEI ;debug-rst/dat ADD2 STA
-	,&flush-rst JMP
-	&end-flush-rst
-
-	( Version 0.1 functionality: print the error and exit )
-	;debug-print-error JSR2
-	#01 .System/halt DEO
-	BRK
-
-@debug-print-opcode ( instr -- )
-	DUP ,&not-brk JCN
-	POP ;&brk-msg ;debug-print JMP2 ( tail call )
-	&brk-msg "BRK 00
-	&not-brk
-	#00 OVR #1f AND #03 MUL ;&opcode-names ADD2 ( instr addr* )
-	LDAk .Console/write DEO INC2
-	LDAk .Console/write DEO INC2
-	LDA  .Console/write DEO
-	DUP #1f AND ,&not-lit JCN
-	#7f AND
-	&not-lit
-	DUP #20 AND #00 EQU ,&not-2 JCN
-	LIT '2 .Console/write DEO
-	&not-2
-	DUP #80 AND #00 EQU ,&not-k JCN
-	LIT 'k .Console/write DEO
-	&not-k
-	    #40 AND #00 EQU ,&not-r JCN
-	LIT 'r .Console/write DEO
-	&not-r
-	JMP2r
-
-	&opcode-names
-		"LITINCPOPDUPNIPSWPOVRROT
-		"EQUNEQGTHLTHJMPJCNJSRSTH
-		"LDZSTZLDRSTRLDASTADEIDEO
-		"ADDSUBMULDIVANDORAEORSFT
-
-@debug-print ( addr* -- )
-	LDAk #00 EQU ,&end JCN
-	LDAk .Console/write DEO
-	INC2
-	,debug-print JMP
-	&end POP2 JMP2r
-
-@debug-print-error
-	;&halted-msg ,debug-print JSR
-	#00 .System/ecode DEI #07 AND #20 SFT2 ;&messages-table ADD2
-	LDA2k ,debug-print JSR
-	INC2 INC2 LDA2 ,debug-print JSR
-	;&executing-msg ,debug-print JSR
-	.System/eaddr DEI2 LDA ;debug-print-opcode JSR2
-	;&at-msg ,debug-print JSR
-	.System/eaddr DEI2 ;debug-print-hex-short JSR2
-	#0a .Console/write DEO
-	;&wst-msg ,debug-print JSR
-	;&contents-msg ,debug-print JSR
-	;debug-wst ;debug-print-stack JSR2
-	#0a .Console/write DEO
-	;&rst-msg ,debug-print JSR
-	;&contents-msg ,debug-print JSR
-	;debug-rst ;debug-print-stack JSR2
-	#0a .Console/write DEO
-	JMP2r
-
-	&messages-table
-		:&wst-msg :&underflow-msg
-		:&rst-msg :&underflow-msg
-		:&wst-msg :&overflow-msg
-		:&rst-msg :&overflow-msg
-		:&wst-msg :&divzero-msg
-		:&rst-msg :&divzero-msg
-		:&emulator-msg :&interrupt-msg
-		:&userdef-msg :&breakpoint-msg
-
-	&halted-msg "Halted: 2000 ( #0002, at 0x0100 )
-	&wst-msg "Working-stack 2000
-	&rst-msg "Return-stack 2000
-	&emulator-msg "Emulator 2000
-	&userdef-msg "User-defined 2000
-	&underflow-msg "underflow 00
-	&overflow-msg "overflow 00
-	&divzero-msg "division 20 "by 20 "zero 00
-	&interrupt-msg "interrupt 00
-	&breakpoint-msg "breakpoint 00
-	&executing-msg 20 "executing 2000
-	&at-msg 20 "at 20 "0x 00
-	&contents-msg "contents: 00
-
-@debug-print-hex-short ( value* -- )
-	SWP ,debug-print-hex-byte JSR
-	( fall through )
-
-@debug-print-hex-byte ( value -- )
-	DUP #04 SFT ,debug-print-hex-nibble JSR
-	#0f AND
-	( fall through )
-
-@debug-print-hex-nibble ( value -- )
-	#30 ADD DUP #39 GTH #27 MUL ADD
-	.Console/write DEO
-	JMP2r
-
-@debug-print-stack ( addr* -- )
-	LDAk ,&not-empty JCN
-	POP2 ;&empty-msg ;debug-print JMP2 ( tail call )
-	&not-empty
-	LDAk STH INC2 ( dat* / count )
-	&loop
-		STHkr #00 EQU ,&end JCN
-		#20 .Console/write DEO
-		LDAk ,debug-print-hex-byte JSR
-		INC2
-		LITr 01 SUBr
-		,&loop JMP
-	&end
-	POP2 POPr
-	JMP2r
-	
-	&empty-msg 20 "(empty) 00
-
-@debug-wst &ptr $1 &dat $ff
-@debug-rst &ptr $1 &dat $ff
-@debug-end
-
diff --git a/src/devices/system.c b/src/devices/system.c
index b34a32e..413773d 100644
--- a/src/devices/system.c
+++ b/src/devices/system.c
@@ -44,18 +44,6 @@ system_inspect(Uxn *u)
 int
 uxn_halt(Uxn *u, Uint8 error, Uint16 addr)
 {
-	Device *d = &u->dev[0];
-	Uint16 vec = GETVECTOR(d);
-	DEVPOKE16(0x4, addr);
-	d->dat[0x6] = error;
-	if(vec) {
-		/* need to rearm to run System/vector again */
-		d->dat[0] = 0;
-		d->dat[1] = 0;
-		if(error != 2) /* working stack overflow has special treatment */
-			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;
diff --git a/src/uxn.c b/src/uxn.c
index d01d7af..5435839 100644
--- a/src/uxn.c
+++ b/src/uxn.c
@@ -39,7 +39,6 @@ uxn_eval(Uxn *u, Uint16 pc)
 	Stack *src, *dst;
 	Device *dev;
 	if(!pc || u->dev[0].dat[0xf]) return 0;
-	if(u->wst.ptr > 0xf8) u->wst.ptr = 0xf8;
 	while((instr = u->ram[pc++])) {
 		/* Return Mode */
 		if(instr & 0x40) {