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📁 李春生的汇编书籍
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<p><a href="content1.html">目录</a> <a href="page337.html">上一页</a> <a href="page339.html">下一页</a> <a href="page341.html">参考文献</a></p>
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<td></td><td>-338-</td><td></td> <!页码>
<td colspan=6>PC机汇编语言实战精解</td><td colspan=4></td><td colspan=6 align="right"><img src="icons/flag.gif"></td> <!书名>
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<td colspan=17 align=right><font face="黑体">续表</font></td>
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<td width=6%>偏移</td><td width=6%>长度</td><td width=13% align=center>位定义<br>7654 3210</td><td width=55%>说明</td><td width=20%>备注</td>
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<td width=6%>72H</td><td width=6%>字</td><td width=13% align=center></td><td width=55%>复位标志：<br>00064H：不变方式<br>01234H：跳过内存测试（热启动）<br>04321H：保护内存（用于PS/2）<br>05678H：系统挂起（用于便携机）<br>09ABCH：环境（MFG）测试（用于便携机）<br>0ABCDH：电源自检循环（用于便携机）</td><td width=20%></td>
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<td width=6%>74H</td><td width=6%>字节</td><td width=13% align=center></td><td width=55%>最近一次硬盘操作状态</td><td width=20%></td>
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<td width=6%>75H</td><td width=6%>字节</td><td width=13% align=center></td><td width=55%>硬盘驱动器数</td><td width=20%></td>
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<td width=6%>76H</td><td width=6%>字节</td><td width=13% align=center></td><td width=55%>硬盘驱动器控制（仅用于XT机）</td><td width=20%></td>
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<td width=6%>77H</td><td width=6%>字节</td><td width=13% align=center></td><td width=55%>硬盘控制器端口（仅用于XT机）</td><td width=20%></td>
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<td width=6%>78H</td><td width=6%>字节</td><td width=13% align=center></td><td width=55%>并行打印适配器LPT1超时值</td><td width=20%></td>
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<td width=6%>79H</td><td width=6%>字节</td><td width=13% align=center></td><td width=55%>并行打印适配器LPT2超时值</td><td width=20%></td>
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<td width=6%>7AH</td><td width=6%>字节</td><td width=13% align=center></td><td width=55%>并行打印适配器LPT3超时值</td><td width=20%></td>
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<td width=6%>7BH</td><td width=6%>字节</td><td width=13% align=center></td><td width=55%>并行打印适配器LPT4超时值</td><td width=20%></td>
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<td width=6%>7CH</td><td width=6%>字节</td><td width=13% align=center></td><td width=55%>串口适配器COM1超时值</td><td width=20%></td>
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<td width=6%>7DH</td><td width=6%>字节</td><td width=13% align=center></td><td width=55%>串口适配器COM2超时值</td><td width=20%></td>
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<td width=6%>7EH</td><td width=6%>字节</td><td width=13% align=center></td><td width=55%>串口适配器COM3超时值</td><td width=20%></td>
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<td width=6%>7FH</td><td width=6%>字节</td><td width=13% align=center></td><td width=55%>串口适配器COM4超时值</td><td width=20%></td>
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<td width=6%>80H</td><td width=6%>字</td><td width=13% align=center></td><td width=55%>键盘缓冲区首地址偏移指针</td><td width=20%></td>
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<td width=6%>82H</td><td width=6%>字</td><td width=13% align=center></td><td width=55%>键盘缓冲区尾地址偏移指针</td><td width=20%></td>
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<td width=6%>84H</td><td width=6%>字节</td><td width=13% align=center></td><td width=55%>EGA/VGA：屏幕显示行数，为真正显示行数减1</td><td width=20%></td>
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<td width=6%>85H</td><td width=6%>字节</td><td width=13% align=center></td><td width=55%>EGA/VGA：字符高度</td><td width=20%></td>
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<td width=6%>87H</td><td width=6%>字节</td><td width=13% align=center><br>*... ....<br>.**. ....<br><br>.... 0...<br>.... .*..<br>.... ..0.<br>.... ..1.<br>.... ...0<br>.... ...1</td><td width=55%>VGA显示控制状态<br>消除显示RAM<br>显示卡上的存储容量<br> 00：64K 01：128K 10：192K 11：256K<br>EGA/VGA显示卡<br>等待显示有效<br>彩色/ECD显示器<br>单色显示器<br>在350线方式下使用ECD显示器变换光标<br>禁止光标变换</td><td width=20%></td>
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<td width=6%>88H</td><td width=6%>字节</td><td width=13% align=center><br>**** ....<br>.... ****</td><td width=55%>EGA/VGA交换数据<br>特征连接位<br>选项交换位</td><td width=20%></td>
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<td width=6%>89H</td><td width=6%>字节</td><td width=13% align=center><br>*... ....</td><td width=55%>EGA/VGA控制位<br>200线</td><td width=20%></td>
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<td width=6%>89H</td><td width=6%>字节</td><td width=13% align=center>...* ....<br>.... *...<br>.... .*..<br>.... ..*.</td><td width=55%>400线<br>未加载调色板<br>单色显示器<br>灰度缩放</td><td width=20%></td>
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<td width=6%>8AH</td><td width=6%>字节</td><td width=13% align=center></td><td width=55%>显示组合码表（DCC）索引</td><td width=20%></td>
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