ORG 0 SJMP STAR ORG 0013H LJMP XW ORG 001BH LJMP TLSTART ORG 30H STAR: CLR RS0 CLR RS1 MOV SP,#30H MOV TMOD,#10H SETB PX1 CLR IT1 MOV IE,#8CH MOV TH1,#3CH MOV TL1,#0B0H MOV 40H,#10 MOV 20H,#80H MOV 72h,#23 MOV 71h,#49 MOV 70h,#51 SETB P3.3 SETB P3.4