( sprite )

:dev/r fff8 ( std read port )
:dev/w fff9 ( std write port )

;mousex 2 ;mousey 2 ;lastx 2 ;lasty 2 ;color 1

|0100 @RESET 

	#05 =dev/r ( set dev/read mouse )
	#02 =dev/w ( set dev/write to sprite ) 

	#00 ,rounds_chr #0004 #0004 ,drawsprite JSR

BRK

|c000 @FRAME
	
	#02 =dev/w ( set dev/write to sprite ) 

	( clear last cursor )
	#10 ,clear_icn ~lastx ~lasty ,drawsprite JSR

	( record mouse values )
	#00 IOR2 =mousex #02 IOR2 =mousey
	#04 IOR #11 ADD =color

	~color ,cursor_icn ~mousex ~mousey ,drawsprite JSR

	( check paint )
	#04 IOR #00 EQU ,skip ROT JMP? POP2
		#05 ,brush_large ~mousex #0004 SUB2 ~mousey #0004 SUB2 ,drawsprite JSR
	@skip

	~mousex =lastx ~mousey =lasty

BRK

@drawsprite
	IOW2 ( y byte )
	IOW2 ( x byte )
	IOW2 ( sprite address )
	IOW ( layer-color )
	RTS

|0200 @SPRITESHEET

@rounds_chr [ 3844 92aa 9244 3800 0038 7c7c 7c38 0000 ]
@cursor_icn [ 80c0 e0f0 f8e0 1000 ]
@clear_icn [ 0000 0000 0000 0000 ]
@brush_large [ 387c fefe fe7c 3800 ]
@brush_small [ 0038 7c7c 7c38 0000 ]

BRK

|d000 @ERROR BRK 

|FFFA .RESET .FRAME .ERROR