get draw-h-line working

one_line_canvas.tal

@@ -9,48 +9,37 @@
 (to run gui: `./run_ui.sh one_line_canvas.tal`)
 (to run debugger: `../uxn/bin/uxnasm one_line_canvas.tal one_line_canvas.rom && ../uxn/bin/uxnemu ../beetbug.rom ./one_line_canvas.rom`)
 %dbug  { #01 .System/debug DEO }
+%PX { #01 .Screen/pixel DEO }
 
 |0100
 @on-reset
 	setup-gui
-    draw-canvas-bounds
+	#58 #58 #1f draw-h-line
+	#58 #58 #1f #02 MUL  draw-h-line
 	BRK
 
-@draw-line
-    (change x,y to top left of canvas)
-    LIT2 00 -canvas-width .Screen/x DEO2
-    LIT2 00 -canvas-height .Screen/y DEO2
-
-    &x $1
-    (set x to 88)
-    #58 ,&x STR
-    (#00 ,&i STR)
+@draw-h-line ( l x y )
+    #00 ( l x y 00 )
+    SWP .Screen/y DEO2 ( l x )
+    ( store vars )
+    !{ &x $1 &l $1 }
+    ,/x STR ,/l STR
 
     &loop
-        #00 LIT &x $1 .Screen/x DEO2
-        LIT &x $1
-        INC
-        ,&x STRk
-
-        EQUk ?&loop
-
-
-
-
-
-
-    (
-    ,&top-left-x STR
-    dbug
-    &loop
-        LIT -width
-        (00 58)
-        ADDk (00 58 58)
-        #00  .Screen/x DEO2 (0058 00B0)
-       	#01 .Screen/pixel DEO
-		INC2 (0059 00B0)
-	    EQUk ?&loop
-	POP2 POP2)
+        ( set x )
+        ,/x LDR DUP ( x x )
+        #00 SWP ( x 00 x)
+        .Screen/x DEO2 ( x )
+        ( draw pixel )
+        PX
+        ( incrment x )
+        INC ( x+1 )
+        ,/x STR ( )
+        ( decrement l )
+        ,/l LDR #01 ( l 01 )
+        SUB ( l-1 )
+        ,/l STRk POP ( l )
+        #00 NEQ ?&loop
 	JMP2r
 
 @setup-gui ( -- )

playground.tal

@@ -0,0 +1,34 @@
+|00 @System &vector $2 &expansion $2 &wst $1 &rst $1 &metadata $2 &r $2 &g $2 &b $2 &debug $1 &state $1
+|10 @Console &vector $2 &read $1 &pad $4 &type $1 &write $1 &error $1
+
+
+|0100
+@on-reset
+    #02 #04 SUB
+    ( mem-test )
+	BRK
+
+@mem-test ( a b c -- x)
+    !{
+    &a $1
+    &b $1
+    &c $1
+    }
+    ,/a STR
+    ,/b STR
+    ,/c STR
+
+    ,/a LDR
+    ,/b LDR
+    ADD
+    ,/c LDR
+    ADD ( 06 )
+
+    STH
+    #00 STH
+    SWP2r
+   	JMP2r
+
+
+
+    ( !{ &a $1 } )