MASKED_FONT		equ 1

			if MASKED_FONT==1
BACKGROUND_COLOR	equ 4
			else
BACKGROUND_COLOR	equ 3
			endif

FONT_WIDTH		equ 8
FONT_HEIGHT		equ 10
SCREEN_WIDTH		equ 320
SCREEN_HEIGHT		equ 256
SCREEN_WIDTH_BYTES	equ (SCREEN_WIDTH/8)
SCREEN_WIDTH_WORDS	equ SCREEN_WIDTH_BYTES/2
SCREEN_BIT_DEPTH	equ 4
SCREEN_RES		equ 8 	; 8=lo resolution, 4=hi resolution
RASTER_X_START		equ $81	; hard coded coordinates from hardware manual
RASTER_Y_START		equ $2c
RASTER_X_STOP		equ RASTER_X_START+SCREEN_WIDTH
RASTER_Y_STOP		equ RASTER_Y_START+256
IMAGESIZE		equ SCREEN_WIDTH_BYTES*SCREEN_BIT_DEPTH*SCREEN_HEIGHT