南邮 微型计算机原理与接口技术 汇编语言 实验一

;FILENAME:            EXA131.ASM

    .486

        DATA  SEGMENT   USE16       ;SEGMENT  拼写错误

         SUM  DB        ?,?            ;多一个逗号

        MESG  DB        '25+9='

        MESG1     DB        0,0,'$'     ;用$作为结束符,用另一个字符串MESG1避免出BX+7

          N1  DB         9,0F0H

          N2  DW         25

        DATA  ENDS

        CODE  SEGMENT   USE16

              ASSUME    CS:CODE,  DS:DATA

        BEG:  MOV       AX,     DATA

              MOV       DS,     AX

              MOV       BX,     OFFSET SUM

              MOV       AH,     N1

              MOV       AL,     BYTE PTR N2     ;类型不匹配

              ADD       AH,     AL

              MOV       [BX],    AH

              MOV       DI,     OFFSET MESG1

              CALL      CHANG

              MOV       AH,     9

              MOV       DX,     OFFSET MESG     ;拼写错误 MEST

              INT        21H

              MOV       AH,  4CH

              INT        21H

       CHANG  PROC

       LAST:  CMP       BYTE PTR [BX], 10        ;操作数长度不匹配

              JC        NEXT

              SUB       BYTE PTR [BX],10         ;操作数长度不匹配

              INC       BYTE PTR [DI]             ;操作数长度不匹配

              JMP       LAST

       NEXT:  MOV       AH,SUM                ;源和目标操作数都是存储器操作数

              ADD       [DI+1],AH

              ADD       BYTE PTR [DI],30H

              ADD       BYTE PTR [DI+1],30H

              RET

       CHANG  ENDP

       CODE  ENDS

              END       BEG

结果：