;****************    MCS 51  IN DEBUG MODE  ********************
;                             2004-DEC  hepco_kid@yahoo.com


SJMP MAIN

ORG 3
JNB P3.2,$
JB  P3.2,$
RETI



MAIN:
MOV IE,#10000001B   ;  ENABLE EXTERNAL INTERRUPT 0

; PLACE YOUR CODE HERE 
;( 8051 DO EVERY INSTRUCTION IN EVERY HIGH TO LOW CLOCK IN INT0 PIN )

AGAIN:
SETB P1.0
CLR  P1.0
SJMP AGAIN

END