ORG 0000H
LJMP MAIN
ORG 0030H
MAIN:
MOV A,#0FEH
MOV R2,#8
LOOP:
MOV P0,A
LCALL DELAY
CLR C
RLC A
DJNZ R2,LOOP
MOV P0,#0FFH
SJMP $
DELAY:
MOV R3,#10
DLY1:
MOV R4,#100
DLY2:
MOV R5,#250
DJNZ R5,$
DJNZ R4,DLY2
DJNZ R3,DLY1
RET
END
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