SWITCH_02

ORG 0000H
MOV A,#00H

LOOP1: PUSH ACC
LOOP: MOV A,P2
CJNE A,#0FFH,LOOP1
POP ACC

MOV P1,A
ACALL DELAY
CPL A
SJMP LOOP

DELAY: MOV R7,#00H
DLY: MOV R6,0FFH
DJNZ R6,$
DJNZ R7,DLY
RET
END