;**	Z100 VIDEO BOARD DEFINITIONS
;

;	6821 USE
;
;  PA0 -> ENABLE RED DISPLAY
;  PA1 -> ENABLE GREEN DISPLAY
;  PA2 -> ENABLE BLUE DISPLAY
;  PA3 -> NOT FLASH SCREEN
;  PA4 -> NOT WRITE MULTIPLE RED
;  PA5 -> NOT WRITE MULTIPLE GREEN
;  PA6 -> NOT WRITE MULTIPLE BLUE
;  PA7 -> DISABLE VIDEO RAM
;  PB0-PB7 -> LA15-LA8
;  CA1 - NOT USED
;  CA2 -> CLEAR SCREEN
;  CB1 - NOT USED
;  CB2 -> VALUE TO WRITE (0 OR 1) ON CLEAR SCREEN

;	LIGHT PEN LATCH

ZLPENBIT EQU	00000111B		;BIT HIT BY PEN
ZLPENROW EQU	11110000B		;ROW HIT BY PEN

;	LIGHT PEN VALUES

ZLPENEV	EQU	5			;LIGHT PEN ERROR VALUE