【正确答案】KEY: MOV P1,#11100000B MOV A,P1 CPL A ANL A,#111000000B JZ GORET KEY1: JB P1.5,KEY2 MOV 30H,#00H KEY2: JB P1.6,KEY3 MOV 30H,#01H KEY3: JB P1.7,GORET MOV 31H,#02H KEY4: MOV P1,#00000111B MOV A,P1 CPL A ANL A,#00000111B JZ GORET JB P1.0,KEY5 MOV A,30H KEY5: JB P1.1,KEY6 MOV A,#3 ADD A,30H KEY6: JB P1.2,GORET MOV A,#6 ADD A,30H KEY7: ADD A,#4 MOV DPTR,#TAB JMP @A+DPTR TAB: LCALL WORK0 RET LCALL WORK1 RET LCALL WORK2 RET LCALL WORK3 RET LCALL WORK4 RET LCALL WORK5 RET LCALL WORK6 RET LCALL WORK7 RET LCALL WORK8 GORET: RET