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8 路抢答器 PCB 抢答器 ORG 0000H LJMP L0100 org 23h ljmp L04A0 DB 'THIS IS SZN1.ASM;' ORG 100H L0100: MOV SP,#50H MOV R7,#0FFH L0105: MOV R6,#10H L0107: DJNZ