1.asm

该程序是在汉字显示系统中

	ORG	0000H
	LJMP	MAIN
	ORG	0030H
MAIN:	MOV	SP,#60H
MAIN0:	MOV	A,#00H
	MOV	P0,A
	MOV	P1,A
	CALL	DISPLAY
	CALL	MOVE
	JMP	MAIN0
DISPLAY:MOV	R2,#04H
	MOV	20H,#00
W4:	MOV	R4,#00H
	MOV	R1,#0FFH
W5:	MOV	R6,#32
	MOV	R0,20H
W2:	CALL	READ1
	INC	R4	
	DJNZ	R6,W2
	MOV	R4,#00H
	DJNZ	R1,W5
	MOV	20H,R0
	DJNZ	R2,W4
	RET
MOVE:	MOV	20H,#00H
	MOV	R4,#00H
Q1:	MOV	R1,#0FFH
Q2:	MOV	R6,#32
	MOV	R0,20H
Q3:	CALL	READ1
	INC	R4
	DJNZ	R6,Q3
	MOV	R4,#00H
	DJNZ	R1,Q2
	MOV	20H,A
	XRL	A,#128
	JNZ	Q1
	RET
READ1:	MOV	A,R4
	MOV	P2,A
	MOV	A,R0
	MOV	DPTR,#4000H
	MOVC	A,@A+DPTR
	MOV	P0,A
	INC	R0
	MOV	A,R0
	MOV	DPTR,#0090H
	MOVC	A,@A+DPTR
	MOV	P1,A
	INC	R0
	MOV	R3,#25
	DJNZ	R3,$
	MOV	A,#00
	MOV	P0,A
	MOV	P1,A
	RET
DELAY:	MOV	R3,#200
W7:	MOV	R5,#248
	DJNZ	R5,$
	DJNZ	R3,W7
	RET
END