#include <sfr51.inc>
ORG 0000H
MULAI: MOV A,#00000000B
ACALL DELAY
MOV P0,A
ACALL DELAY
MOV P1,A
ACALL DELAY
MOV P2,A
ACALL DELAY
MOV P3,A
ACALL DELAY
SJMP MULAI
DELAY: MOV R0,#100
DELAY1: MOV R1,#0FFH
DELAY2: MOV R2,#0
DJNZ R2,$
DJNZ R1,DELAY2
DJNZ R0,DELAY1
RET
END
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