【正文】 MOV AL,[SI+BX] OUT 40H,AL CALL DELY BAI: MOV AH,00001000B 。從第3位開始顯示 MOV AL,AH OUT 42H,AL MOV BL,NUMB1[2] MOV BH,0 MOV AL,[SI+BX] OUT 40H,AL CALL DELYSHI: MOV AH,00010000B 。從第2位開始顯示 MOV AL,AH OUT 42H,AL MOV BL,NUMB1[1] MOV BH,0 MOV AL,[SI+BX] OUT 40H,AL CALL DELY JMP GGG MOMI: MOV AH,00010000B 。從第2位開始顯示 MOV AL,AH OUT 42H,AL 。把位選放進(jìn)去B口，把位選 MOV BL,10 MOV BH,0 MOV AL,[SI+BX] OUT 40H,AL 。把段選放進(jìn)A口 CALL DELY GGG: MOV AH,00100000B 。從第1位開始顯示 MOV AL,AH OUT 42H,AL MOV BL,NUMB1[0] MOV BH,0 MOV AL,[SI+BX] OUT 40H,AL CALL DELYEXIT4: MOV AL,90H OUT 46H,AL POP AX POP BX RETDISP ENDPDISP0 PROCPUSH BXPUSH AXMOV BH,0LEA SI,DISCODECALL BITP0 。測試NUMB1位數(shù)MOV AL,80HOUT 46H,ALCMP CC0,6JZ SHIWAN0CMP CC0,5JZ WAN0CMP CC0,4JZ QIAN0CMP CC0,3JZ BAI0CMP CC0,2JZ SHI0JMP MOMI0。CMP CC,1。JZ GGG。CMP CC,0。JZ EXIT4SHIWAN0: MOV AH,00000001B 。從第6位開始顯示 MOV AL,AH OUT 42H,AL MOV BL,NUMB2[5] MOV BH,0 MOV AL,[SI+BX] OUT 40H,AL CALL DELYWAN0: MOV AH,00000010B 。從第5位開始顯示 MOV AL,AH OUT 42H,AL MOV BL,NUMB2[4] MOV BH,0 MOV AL,[SI+BX] OUT 40H,AL CALL DELYQIAN0: MOV AH,00000100B 。從第4位開始顯示 MOV AL,AH OUT 42H,AL MOV BL,NUMB2[3] MOV BH,0 MOV AL,[SI+BX] OUT 40H,AL CALL DELY BAI0: MOV AH,00001000B 。從第3位開始顯示 MOV AL,AH OUT 42H,AL MOV BL,NUMB2[2] MOV BH,0 MOV AL,[SI+BX] OUT 40H,AL CALL DELYSHI0: MOV AH,00010000B 。從第2位開始顯示 MOV AL,AH OUT 42H,AL MOV BL,NUMB2[1] MOV BH,0 MOV AL,[SI+BX] OUT 40H,AL CALL DELY JMP GGG0 MOMI0: MOV AH,00010000B 。從第2位開始顯示 MOV AL,AH OUT 42H,AL 。把位選放進(jìn)去B口，把位選 MOV BL,10 MOV BH,0 MOV AL,[SI+BX] OUT 40H,AL 。把段選放進(jìn)A口 CALL DELY GGG0: MOV AH,00100000B 。從第1位開始顯示 MOV AL,AH OUT 42H,AL MOV BL,NUMB2[0] MOV BH,0 MOV AL,[SI+BX] OUT 40H,AL CALL DELYEXIT40: MOV AL,90H OUT 46H,AL POP AX POP BX RETDISP0 ENDP 。分析數(shù)據(jù)位數(shù)子程序BITP0 PROCCMP NUMB2[5],0 。如果NUMB1[5]不為0，則數(shù)據(jù)為6位數(shù)JNZ SIXBIT0CMP NUMB2[4],0 。如果NUMB1[4]不為0，則數(shù)據(jù)為5位數(shù)JNZ FIVEBIT0CMP NUMB2[3],0 。如果NUMB1[3]不為0，則數(shù)據(jù)為4位數(shù)JNZ FOURBIT0CMP NUMB2[2],0 。如果NUMB1[2]不為0，則數(shù)據(jù)為3位數(shù)JNZ THREEBIT0CMP NUMB2[1],0 。如果NUMB1[1]不為0，則數(shù)據(jù)為2位數(shù)JNZ TOWBIT0CMP NUMB2[0],0 。如果NUMB1[0]不為0，則數(shù)據(jù)為1位數(shù)JNZ ONEBIT0JMP ZER0BIT0 。否則，沒有數(shù)據(jù)SIXBIT0: MOV CC0,6JMP EXIT5FIVEBIT0: MOV CC0,5JMP EXIT5FOURBIT0: MOV CC0,4JMP EXIT5THREEBIT0: MOV CC0,3JMP EXIT5TOWBIT0: MOV CC0,2JMP EXIT5ONEBIT0: MOV CC0,1JMP EXIT5ZER0BIT0: MOV CC0,0EXIT50: RETBITP0 ENDP。分析數(shù)據(jù)位數(shù)子程序BITP PROCCMP NUMB1[5],0 。如果NUMB1[5]不為0，則數(shù)據(jù)為6位數(shù)JNZ SIXBITCMP NUMB1[4],0 。如果NUMB1[4]不為0，則數(shù)據(jù)為5位數(shù)JNZ FIVEBITCMP NUMB1[3],0 。如果NUMB1[3]不為0，則數(shù)據(jù)為4位數(shù)JNZ FOURBITCMP NUMB1[2],0 。如果NUMB1[2]不為0，則數(shù)據(jù)為3位數(shù)JNZ THREEBITCMP NUMB1[1],0 。如果NUMB1[1]不為0，則數(shù)據(jù)為2位數(shù)JNZ TOWBITCMP NUMB1[0],0 。如果NUMB1[0]不為0，則數(shù)據(jù)為1位數(shù)JNZ ONEBITJMP ZER0BIT 。否則，沒有數(shù)據(jù)SIXBIT: MOV CC,6JMP EXIT5FIVEBIT: MOV CC,5JMP EXIT5FOURBIT: MOV CC,4JMP EXIT5THREEBIT: MOV CC,3JMP EXIT5TOWBIT: MOV CC,2JMP EXIT5ONEBIT: MOV CC,1JMP EXIT5ZER0BIT: MOV CC,0EXIT5: RETBITP ENDP。延時(shí)子程序DELY PROCPUSH CXMOV CX,1000LOOP $POP CXRETDELY ENDPCODE ENDSEND START五、參考文獻(xiàn) 《清華大學(xué)TPC—2003A實(shí)驗(yàn)指導(dǎo)書》，2006版 《新編16/32位微型計(jì)算機(jī)原理及應(yīng)用》，李繼燦主編，清華大學(xué)出版社，2008版，第四版 《微機(jī)原理實(shí)驗(yàn)指導(dǎo)書》，楊國田、高明明編寫，校內(nèi)待出版，2002年3月，第一版 38