求C51单片机汇编语言控制两位数码管倒计时程序,最好能说明下思路_百度...答:查询方式:ORG 00H START: MOV R0,#20 MOV R4,#60 LP0: MOV TMOD,#01H MOV TH0,#3CH MOV TL0,#0B0H MOV DPTR,#TABLE SETB TR0 LP1: JBC TF0,LP2 ACALLDISP AJMP LP1 LP2: DJNZ R0,LP0 CLR TR0 MOVR0,#20 MOV A,R4 CJNE A,#0,DEC1 MOV R4...