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DELAY: MOV R6,#FAH
DE1: MOV R7,#FAH
DE2: DJNZ R7,DE2

JNB P0.3,STOP
DJNZ R6,DE1
JNB P0.3,STOP
DJNZ R5,DELAY
JNB P0.3,STOP
RET
;----------------------------
STOP: AJMP BEGIN
;----------------------------
END