;;晶振12MHZ,延時1秒



DELAY:MOV 72H,#100
LOOP3:MOV 71H,#100
LOOP1:MOV 70H,#47
LOOP0:DJNZ 70H,LOOP0
      NOP 
      DJNZ 71H,LOOP1
      MOV 70H,#46
LOOP2:DJNZ 70H,LOOP2
      NOP
      DJNZ 72H,LOOP3
      MOV 70H,#48
LOOP4:DJNZ 70H,LOOP4