diff --git a/projects/software/orca.usm b/projects/software/orca.usm
index ee15f6d..538e065 100644
--- a/projects/software/orca.usm
+++ b/projects/software/orca.usm
@@ -1,13 +1,28 @@
-( Orca )
+( Orca 
+	
+	TODO
+		- Clamp selection to grid
+		- Chorded copy/paste
+		- Locking ports
+		- Detect capitalization
+		- Fill grid with . characters on start
+		- Display guides
+		- Draw Frame number in UI
+		- Comments
+		- Load/Save
+		- Copy/Paste
+)
 
 %RTN { JMP2r }
 %8* { #0008 MUL2 } %8/ { #0008 DIV2 }
+%MOD { DUP2 DIV MUL SUB }
 
 ( variables )
 
 ;timer { byte 1 frame 1 }
 ;grid { width 1 height 1 }
 ;selection { x1 1 y1 1 x2 1 y2 1 }
+;cursor { x 2 y 2 }
 
 ( devices )
 
@@ -17,18 +32,23 @@
 |0130 ;Sprite { vector 2 pad 6 x 2 y 2 addr 2 color 1 }
 |0140 ;Controller { vector 2 button 1 }
 |0150 ;Keys { vector 2 key 1 }
+|0160 ;Mouse  { vector 2 x 2 y 2 state 1 chord 1 }
 
 |0200
 
 	( theme ) #0faf =System.r #0fff =System.g #0f5f =System.b
 	( vectors ) ,on-button =Controller.vector
 	( vectors ) ,on-key =Keys.vector
+	( vectors ) ,on-mouse =Mouse.vector
 	( vectors ) ,on-frame =Screen.vector
 
 	( find size )
 	~Screen.width 8/ SWP POP =grid.width
 	~Screen.height 8/ SWP POP =grid.height
 
+	( fill grid with dots )
+
+	,start JSR2
 	,redraw JSR2
 
 BRK
@@ -75,10 +95,59 @@ BRK
 			~selection.x1 #01 ADD =selection.x1 
 			~selection.x2 #01 ADD =selection.x2 $no-right
 	POP
+
+	~Controller.button #04 NEQ ^$no-backspace JNZ
+		~Controller.button =Console.byte
+		~selection.x1 ~selection.y1 #2e ,put-char JSR2 ( put . char )
+	$no-backspace
+
 	,redraw JSR2
 
 BRK
 
+@on-mouse
+	
+	~Mouse.state #00 EQU ^$no-touch JNZ
+		~Mouse.x 8/ SWP POP =selection.x1
+		~Mouse.y 8/ SWP POP =selection.y1
+		,redraw JSR2
+	$no-touch
+
+	( clear last cursor )
+	~cursor.x =Sprite.x
+	~cursor.y =Sprite.y
+	,blank_icn =Sprite.addr
+	#10 =Sprite.color
+
+	( record cursor positions )
+	~Mouse.x =cursor.x 
+	~Mouse.y =cursor.y
+
+	( draw new cursor )
+	~cursor.x =Sprite.x
+	~cursor.y =Sprite.y
+	,cursor_icn =Sprite.addr
+	#12 ~Mouse.state #01 EQU ADD =Sprite.color
+	
+BRK
+
+@start ( -- )
+	
+	#00 ~grid.height
+	$ver
+		#00 ~grid.width
+		$hor
+			( get x,y ) SWP2 OVR STH SWP2 OVR STHr 
+			#2e ,put-char JSR2
+			( incr )    SWP #01 ADD SWP
+			DUP2 LTH ^$hor JNZ
+		POP2
+		( incr ) SWP #01 ADD SWP
+		DUP2 LTH ^$ver JNZ
+	POP2
+
+RTN
+
 @is-selected ( x y -- flag )
 	
 	~selection.x1 ~selection.y1 EQU2
@@ -103,9 +172,21 @@ RTN
 
 RTN
 
+@get-char-value ( char -- value )
+	
+	#00 SWP ,values ADD2 PEK2
+
+RTN
+
+@get-value-char ( value -- char )
+	
+	#00 SWP ,b36clc ADD2 PEK2
+	
+RTN
+
 @get-value ( x y -- value )
 	
-	POP2 #01
+	,get-char JSR2 #20 SUB ,get-char-value JSR2
 
 RTN
 
@@ -118,11 +199,12 @@ RTN
 @op-a ( x y char -- )
 
 	POP
-
 	( get left ) DUP2 SWP #01 SUB SWP ,get-value JSR2 STH
 	( get right ) DUP2 SWP #01 ADD SWP ,get-value JSR2 STH
-
-	#01 ADD ADDr STHr ( remove this extra addition -> ) #30 ADD ,put-char JSR2
+	( incr y ) #01 ADD 
+	( get result ) ADDr STHr 
+	,get-value-char JSR2 
+	,put-char JSR2
 
 RTN
 
@@ -136,7 +218,7 @@ RTN
 	
 	POP
 	#01 ADD
-	#30 ~timer.frame ADD ,put-char JSR2
+	#30 ~timer.frame #08 MOD ADD ,put-char JSR2
 
 RTN
 
@@ -165,7 +247,6 @@ RTN
 		( incr ) SWP #01 ADD SWP
 		DUP2 LTH ^$ver JNZ
 	POP2
-
 	,redraw JSR2
 
 RTN
@@ -190,7 +271,42 @@ RTN
 
 RTN
 
-@blank_icn [ ffff ffff ffff ffff ]
+( char to b36 )
+
+@values [
+	
+	00 00 00 00 00 00 00 00 
+	00 00 00 00 00 00 00 00 
+
+	00 01 02 03 04 05 06 07
+	08 09 00 00 00 00 00 00
+
+	00 0a 0b 0c 0d 0e 0f 10 
+	11 12 13 14 15 16 17 18
+	19 1a 1b 1c 1d 1e 1f 20
+	21 22 23 00 00 00 00 00
+
+	00 0a 0b 0c 0d 0e 0f 10 
+	11 12 13 14 15 16 17 18
+	19 1a 1b 1c 1d 1e 1f 20
+	21 22 23 00 00 00 00 00
+
+]
+
+( b36 to char-lc )
+
+@b36clc [
+	
+	30 31 32 33 34 35 36 37
+	38 39 61 62 63 64 65 66
+	67 68 69 6a 6b 6c 6d 6e
+	6f 70 71 72 73 74 75 76
+	77 78 79 7a
+
+]
+
+@cursor_icn [ 80c0 e0f0 f8e0 1000 ]
+@blank_icn  [ 0000 0000 0000 0000 ]
 
 @font ( specter8-frag font ) 
 [