diff --git a/projects/software/calc.tal b/projects/software/calc.tal
index a861bc2..8bdb9ac 100644
--- a/projects/software/calc.tal
+++ b/projects/software/calc.tal
@@ -5,7 +5,8 @@
 %++ { ADD2 } %-- { SUB2 }              %// { DIV2 }
 %<< { LTH2 } %>> { GTH2 } %== { EQU2 } %!! { NEQ2 }
 
-%4/   { #02 SFT }
+%2* { #10 SFT } 
+%4/ { #02 SFT }
 %4* { #20 SFT }
 %2**  { #10 SFT2 } %2// { #01 SFT2 }
 %4** { #20 SFT2 }
@@ -42,6 +43,9 @@
 
 @input
 	&length $1 &value $2
+@stack
+	&length $1
+	&items $10
 @center
 	&x $2 &y $2
 @rect
@@ -51,9 +55,9 @@
 @keypad-frame
 	&x $2 &y $2 &x2 $2 &y2 $2
 @modpad-frame
-	&x $2 &y $2
+	&x $2 &y $2 &x2 $2 &y2 $2
 @input-frame
-	&x $2 &y $2
+	&x $2 &y $2 &x2 $2 &y2 $2
 
 ( program )
 
@@ -78,11 +82,19 @@
 	DUP2 .keypad-frame/y STZ2
 		#0040 ++ .keypad-frame/y2 STZ2
 
-	.keypad-frame/x LDZ2 #0040 ++ .modpad-frame/x STZ2
-	.keypad-frame/y LDZ2 .modpad-frame/y STZ2
+	.keypad-frame/x LDZ2 #0040 ++ 
+	DUP2 .modpad-frame/x STZ2
+		#0010 ++ .modpad-frame/x2 STZ2
+	.keypad-frame/y LDZ2 
+	DUP2 .modpad-frame/y STZ2
+		#0040 ++ .modpad-frame/y2 STZ2
 
-	.center/x LDZ2 #0010 -- .input-frame/x STZ2
-	.center/y LDZ2 #0030 -- .input-frame/y STZ2
+	.center/x LDZ2 #0010 -- 
+	DUP2 .input-frame/x STZ2
+		#0040 ++ .input-frame/x2 STZ2
+	.center/y LDZ2 #0030 -- 
+	DUP2 .input-frame/y STZ2
+		#0010 ++ .input-frame/y2 STZ2
 
 	;on-mouse .Mouse/vector DEO2
 
@@ -109,24 +121,60 @@ BRK
 
 	.Mouse/state DEI BRK?
 
-	.Mouse/x DEI2 
-	.Mouse/y DEI2 
-	.keypad-frame 
+	.Mouse/x DEI2 .Mouse/y DEI2 
+	OVR2 OVR2 .keypad-frame 
 		;within-rect JSR2 ;click-keypad JCN2
+	OVR2 OVR2 .input-frame 
+		;within-rect JSR2 ;click-input JCN2
+	OVR2 OVR2 .modpad-frame 
+		;within-rect JSR2 ;click-modpad JCN2
+	POP2 POP2
 
 BRK
 
-@click-keypad ( -> )
+@click-keypad ( x* y* -> )
 
 	( get key )
-	.Mouse/x DEI2 .keypad-frame/x LDZ2 -- 10// 4MOD
-	.Mouse/y DEI2 .keypad-frame/y LDZ2 -- 10// 4**
+	.keypad-frame/y LDZ2 -- 10// 4**
+	SWP2 .keypad-frame/x LDZ2 -- 10// #0003 AND2
 	++ ;keypad/layout ++ LDA ;push-key JSR2
 
 	( release mouse ) #00 .Mouse/state DEO
 
 BRK
 
+@click-modpad ( x* y* -> )
+
+	NIP2
+	( get key )
+	.modpad-frame/y LDZ2 -- 10// NIP
+	DUP #00 ! ,&no-add JCN
+		;pop JSR2
+		;pop JSR2
+		ADD2 ;push JSR2
+		&no-add
+	POP
+
+	( release mouse ) #00 .Mouse/state DEO
+
+BRK
+
+@click-input ( x* y* -> )
+
+	POP2
+	.input-frame/x LDZ2 #0008 ++ -- 10// NIP
+	DUP #01 ! ,&no-push JCN
+		.input/value LDZ2 ;push JSR2
+		&no-push
+	DUP #02 ! ,&no-pop JCN
+		;pop JSR2 POP2
+		&no-pop
+	POP
+
+	( release mouse ) #00 .Mouse/state DEO
+
+BRK
+
 @push-key ( key -- )
 
 	TOS .input/value LDZ2 #40 SFT2 ++ .input/value STZ2
@@ -135,11 +183,62 @@ BRK
 
 RTN
 
+@push ( value* -- )
+
+	( store ) .stack/length LDZ 2* .stack/items + STZ2
+	( incr ) .stack/length LDZ INC .stack/length STZ
+	( reset ) #0000 .input/value STZ2
+	;draw-input JSR2
+	;draw-stack JSR2
+
+RTN
+
+@pop ( -- value* )
+
+	.stack/length LDZ #01 - 2* .stack/items + LDZ2
+	( clear ) #0000 .stack/length LDZ #01 - 2* .stack/items + STZ2
+	( incr ) .stack/length LDZ #01 - .stack/length STZ
+	;draw-input JSR2
+	;draw-stack JSR2
+
+RTN
+
 @redraw ( -- )
 
 	;draw-keypad JSR2
 	;draw-modpad JSR2
 	;draw-input JSR2
+	;draw-stack JSR2
+
+RTN
+
+@draw-stack ( -- )
+
+	#08 #00
+	&loop
+		( value ) DUP 2* .stack/items + LDZ2 STH2
+		( y ) DUP TOS 8** #0070 SWP2 -- STH2
+		( x ) #0088 STH2r STH2r #01 ;draw-short JSR2
+		INC GTHk ,&loop JCN
+	POP2
+
+RTN
+
+@draw-short ( x* y* value* color -- )
+
+	POP STH2
+	.Screen/y DEO2
+	.Screen/x DEO2
+
+	#04 #00
+	&loop
+		.Screen/x DEI2 #0008 -- .Screen/x DEO2
+		( value ) DUP STH2kr ROT 4* SFT2 #000f AND2
+		( value glyph ) 8** ;font-hex ++ .Screen/addr DEO2
+		#01 .Screen/sprite DEO
+		INC GTHk ,&loop JCN
+	POP2
+	POP2r
 
 RTN