sy5-dos.asm

汇编语言中

.MODEL        SMALL
.STACK
.DATA
      ENTER1  DB        13,10,'$'
.CODE
.STARTUP
              MOV       DX,0
              MOV       CX,16
      LOOP2:  PUSH      CX
              MOV       CX,16
      LOOP1:  PUSH      CX
              CMP       DL,7
              JE        OUTPUT
              CMP       DL,8
              JE        OUTPUT
              CMP       DL,9
              JE        OUTPUT
              CMP       DL,10
              JE        OUTPUT
              CMP       DL,13
              JE        OUTPUT
              MOV       AH,02H
              INT       21H
              JMP       OUTPUT1
     OUTPUT:  PUSH      DX
              MOV       DL,20H
              MOV       AH,02H
              INT       21H
              POP       DX
    OUTPUT1:  PUSH      DX
              MOV       DL,20H
              MOV       AH,02H
              INT       21H
              POP       DX
              INC       DX
              POP       CX
              LOOP      LOOP1
              PUSH      DX
              LEA       DX,ENTER1
              MOV       AH,09H
              INT       21H
              POP       DX
              POP       CX
              LOOP      LOOP2
.EXIT         0
              END