用AT89C51单片机,4位共阴极数码管,显示出1234 程序怎么写??? 请各位...答:MOV 31H,#01H MOV 32H,#02H MOV 33H,#03H MOV 34H,#04H MOV 35H,#05H MOV 36H,#06H ACALL D0 JMP $-2 D0: MOV R0,#31H MOV R2,#11111110B MOV DPTR,#TAB D1: ORL P1,#00111111B MOV A,@R0 MOVC A,@A+DPTR MOV R3,#8 D2...