ex1.asm

proteus仿真的三个例子

ORG 0000H
SJMP START
ORG 0030H
START: CLR P1.0
       LCALL DELAY
	   SETB P1.0
	   LCALL DELAY
	   LJMP START
DELAY:  MOV R5,#20	    ;延时子程序，延时0.2秒 
D1:		MOV R6,#20 
D2:		MOV R7,#248 
		DJNZ R7,$ 
		DJNZ R6,D2 
		DJNZ R5,D1 
		RET  
        END