$mod51


led equ p2.0


org 000h
ljmp 0050h


org 0050h

loop:

setb led ;the two acall in the loop
acall delay1 ; why do not work with RET in the
clr led ;end of delay1 and delay2?
acall delay2
sjmp loop






delay1:
mov 30h,#255
mov 31h,#255
time1:
djnz 30h,time1
djnz 31h,time1
sjmp commom_return ; RET here do not work! why not?? see the loop above.



delay2:
mov 30h,#255
mov 31h,#255
time2:
djnz 30h,time2
djnz 31h,time2
sjmp commom_return ; RET here do not work! why not ?? see the loop above


commom_return:
ret ; commom RET for delay1 and delay2.
; now de code is working ok.












end