用單片機仿真實現走馬燈的運行效果，8只LED從左到右循環滾動點亮，時間間隔0.5s

ORG 0000H

LJMP MAIN

ORG 000BH

LJMP T0ISR

ORG 0030H

MAIN:

MOV TMOD,#01H

MOV TH0,#HIGH(65536-50000)

MOV TL0,#LOW(65536-50000)

SETB TR0

SETB ET0

SETB EA

MOV A,#0FEH

SJMP $

T0ISR:

CLR TR0

MOV TH0,#HIGH(65536-50000)

MOV TL0,#LOW(65536-50000)

SETB TR0

MOV P0,A

RL A

RETI

END