;繼電器控制
       OUTPUT BIT P1.0
       ORG 0000H
       LJMP START
       ORG  0030
START:
       clr   OUTPUT
       CALL  DELAY
       setb  OUTPUT
       CALL  DELAY
       Ljmp  START

Delay: 
       mov   r6, #0
       mov   r7, #0
DLoop: djnz  r7, DLoop
       djnz  r6, DLoop
       ret

       end