;
;
;	BIT MAP GENERATOR
;
;  ****Donated to the Pascal/Z Users Group,July 1980******
;  part of the Monitor System by PCE
;
ZERO	EQU	2000H
ONE	EQU	4000H
SIZE	EQU	3F00H
MAP	EQU	1000H
FINIS	EQU	0
;
;	START
;
START	LD	HL,MAP
	LD	SP,HL
	LD	DE,MAP+1
	LD	BC,0FFFH
	XOR	A
	LD	(HL),A
	LDIR
;
	LD	HL,MAP
	LD	IX,ZERO
	LD	IY,ONE
	LD	BC,(SIZE)
LOOP1	LD	DE,0800H
LOOP2	DEC	BC
	LD	A,B
	OR	C
	JP	Z,FINIS
	LD	A,(IY)
	CP	(IX)
	JR	Z,LOW
HIGH	SCF
	JR	NEXT
LOW	XOR	A
NEXT	LD	A,E
	RRA
	LD	E,A
	INC	IX
	INC	IY
	DEC	D
	JR	NZ,LOOP2
	LD	(HL),E
	INC	HL
	JR	LOOP1
;
;
	END	START