ORG 0000H
LJMP MAIN
ORG 0013H
LJMP EXT1
ORG 0030H
MAIN:
MOV A,#0FEH
LOOP:
MOV P1,A
RL A
LCALL DELAY
SJMP LOOP
EXT1:
MOV P1,#00H
MOV R7,#10
DD:
LCALL DELAY
DJNZ R7,DD
RETI
DELAY:
MOV R2,#200
DLY:
MOV R3,#250
DJNZ R3,$
DJNZ R2,DLY
RET
END
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