12.1.2 p0口的扩展使用实例.txt

里面有好多的原码,大家都来下载.用asm编写的

MOV	R0,}#73H					
MOV 	A,#88H
MOVX 	@R0,A					
MOV 	R1,#20H					
MOV 	R2,#32H					
LOOP:
MOV 	R0,@72H					
LOOP1:
MOW 	A, @R0					
JB 		ACC.7,LOOP1				
MOV 	R0,#70H					
MOV 	A, @R1					
MOVX 	@R0,A					
INC		R1						
MOV 	R0,#73H					
MOV 	A,#00H
MOVX 	@R0,A					
MOV 	A, #01H
MOVX 	@R0,A					
DJN 	R2,LOOP					
RET