ADD A, 60H MOV 60H，A JNC NEXT INC 61H
NEXT : INC R0
DJNZ R7,LOOP SJMP $ END 6.ORG 0000H
MAIN:MOV TMOD,320H MOV TH1,#0F4H MOV TL1,#0F4H SETB TR1 MOV R0,#50H MOV R7,#10H MOV SCON,#0D0H MOV PCON,#00H
WAIT:JBC RI,PR1 SJMP WAIT PR1:MOV A,SBUF JNB P,PNP JNB RB8,PER SJMP REGHT PNP:JB RB8,PER
RIGHT:MOV @R0,A INC R0
DJNZ R7,WAIT CLR PSW.5 SJMP $ PER:SETB PSW.5 SJMP $ END 第9页共9页
