51单片机汇编语言写串口程序答:LJMP S_INT TAB:DB 20H,49H,20H,47H,45H,54H,20H,'NULL'ORG 0050H MOV TMOD,#20H MOV TH1,#0FDH MOV TL1,#0FDH SETB TR1 SETB SM1 CLR SM0 SETB EA SETB ES MOV R0,#30H MOV A,#1H MAIN:SETB REN ACALL DELAY JNZ MAIN MOV R2,#0 MOV DPTR,#TAB MOV R7,#7 SEND:MOV ...