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📁 我们学校教授的课件 很好的学习助手啊 里面讲的很详细 汉好
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    <blockquote>
      <p align="left"><font face="宋体" size="5" color="#FFFFFF">ASSUME&nbsp; CS：CODE1</font></p>
    </blockquote>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">MAIN PROC FAR</font></p>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">START：PUSH&nbsp; DS</font></p>
    <blockquote>
      <blockquote>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">XOR AX，AX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">PUSH AX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV AX，0</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV DS，AX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV BX，200H；80H*4=200H</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV AX，[BX]</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">PUSH AX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV AX，[BX+2]</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">PUSH AX 
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ；保存原向量</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV AX，OFFSET INTSUB</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV [BX]，AX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV AX，SEG INTSUB</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV [BX+2]，AX 
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ；设置新向量</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">INT 80H</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">POP AX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV [BX+2]，AX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">POP AX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV [BX]，AX 
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ；恢复原向量</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">RET</font></p>
      </blockquote>
    </blockquote>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">MAIN ENDP</font></p>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">CODE1 ENDS</font></p>
    <p align="left">　</p>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">CODE2 SEGMENT</font></p>
    <blockquote>
      <p align="left"><font face="宋体" size="5" color="#FFFFFF">ASSUME CS：CODE2</font></p>
    </blockquote>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">INTSUB PROC FAR</font></p>
    <blockquote>
      <blockquote>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">PUSH AX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">PUSH DX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV AH，02</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV DL，41H</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">INT 21H&nbsp; ；display ‘A’</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">POP DX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">POP AX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">IRET</font></p>
      </blockquote>
    </blockquote>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">INTSUN ENDP</font></p>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">CODE2 ENDS</font></p>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">&nbsp; END START</font></p>
  </blockquote>
</blockquote>

<blockquote>
  <h4 align="left"><font face="宋体" size="5" color="#FFFFFF">2、使用25H和35H的DOS功能调用</font></h4>
</blockquote>
<div align="center"><center>

<table border="1" width="70%">
  <tr>
    <td width="19%" align="center" bgcolor="#3F8F36"><big><big>功能号</big></big></td>
    <td width="31%" align="center" bgcolor="#3F8F36"><big><big>功能</big></big></td>
    <td width="25%" align="center" bgcolor="#3F8F36"><big><big>入口参数</big></big></td>
    <td width="25%" align="center" bgcolor="#3F8F36"><big><big>出口参数</big></big></td>
  </tr>
  <tr>
    <td width="19%" align="center" bgcolor="#3F8F36"><big><big>25H</big></big></td>
    <td width="31%" bgcolor="#3F8F36"><big><big>设置中断向量</big></big></td>
    <td width="25%" bgcolor="#3F8F36"><big><big>（AL）=中断类型号</big></big><p><big><big>（DS：DX）=中断向量</big></big></td>
    <td width="25%" bgcolor="#3F8F36">　</td>
  </tr>
  <tr>
    <td width="19%" align="center" bgcolor="#3F8F36"><big><big>35H</big></big></td>
    <td width="31%" bgcolor="#3F8F36"><big><big>取中断向量</big></big></td>
    <td width="25%" bgcolor="#3F8F36"><big><big>（AL）=中断类型号</big></big></td>
    <td width="25%" bgcolor="#3F8F36"><big><big>（ES：BX）=中断向量</big></big></td>
  </tr>
</table>
</center></div>

<blockquote>
  <p align="left"><font face="宋体" size="5" color="#FFFFFF">例如：</font></p>
</blockquote>

<blockquote>
  <blockquote>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">CODE1　SEGMENT</font></p>
    <blockquote>
      <p align="left"><font face="宋体" size="5" color="#FFFFFF">ASSUME&nbsp; CS：CODE1</font></p>
    </blockquote>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">MAIN PROC FAR</font></p>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">START：PUSH&nbsp; DS</font></p>
    <blockquote>
      <blockquote>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">XOR AX，AX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">PUSH AX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV AL，80H 
        ；中断类型号</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV AH，35H</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">INT 21H</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">PUSH ES</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">PUSH BX 
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ；保存原向量</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV AX，SEG INTSUB</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV DS，AX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV DX，OFFSET INTSUB</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV AL，80H</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV AH，25H</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">INT 21H 
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ；设置新向量</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">INT 80H 
        &nbsp;&nbsp;&nbsp;&nbsp; ；执行中断</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">POP DX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">POP DS</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV&nbsp; AL，80H</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV&nbsp; AH，25H</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">INT 21H 
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ；恢复原向量</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">RET</font></p>
      </blockquote>
    </blockquote>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">MAIN ENDP</font></p>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">CODE1 ENDS</font></p>
    <p align="left">　</p>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">CODE2 SEGMENT</font></p>
    <blockquote>
      <p align="left"><font face="宋体" size="5" color="#FFFFFF">ASSUME CS：CODE2</font></p>
    </blockquote>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">INTSUB PROC FAR</font></p>
    <blockquote>
      <blockquote>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">PUSH AX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">PUSH DX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV AH，02</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">MOV DL，41H</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">INT 21H&nbsp; ；display ‘A’</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">POP DX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">POP AX</font></p>
        <p align="left"><font face="宋体" size="5" color="#FFFFFF">IRET</font></p>
      </blockquote>
    </blockquote>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">INTSUN ENDP</font></p>
    <p align="left"><font face="宋体" size="5" color="#FFFFFF">CODE2 ENDS</font></p>
    <blockquote>
      <p align="left"><font face="宋体" size="5" color="#FFFFFF">END START</font></p>
    </blockquote>
  </blockquote>
</blockquote>

<h3 align="left"><font face="宋体" size="5" color="#FFFFFF">六、中断处理子程序的典型结构</font></h3>

<blockquote>
  <p align="left"><font face="宋体" size="5" color="#FFFFFF">1、保护现场；</font></p>
  <p align="left"><font face="宋体" size="5" color="#FFFFFF">2、开中断STI，允许级别高的中断进入；</font></p>
  <p align="left"><font face="宋体" size="5" color="#FFFFFF">3、程序功能；</font></p>
  <p align="left"><font face="宋体" size="5" color="#FFFFFF">4、恢复现场；</font></p>
  <p align="left"><font face="宋体" size="5" color="#FFFFFF">5、中断返回IRET。</font></p>
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