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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="page335.html">上一页</a> <a href="page337.html">下一页</a> <a href="page341.html">参考文献</a></p>
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<td></td><td>-336-</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=18><font face="黑体"><a name="BBB">附录D BIOS数据区</a></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=50%>说明</td><td width=25%>备注</td>
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<td width=6%>00H</td><td width=6%>字</td><td width=13% align=center></td><td width=50%>串行口COM1基地址</td><td width=25%></td>
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<td width=6%>02H</td><td width=6%>字</td><td width=13% align=center></td><td width=50%>串行口COM2基地址</td><td width=25%></td>
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<td width=6%>04H</td><td width=6%>字</td><td width=13% align=center></td><td width=50%>串行口COM3基地址</td><td width=25%></td>
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<td width=6%>06H</td><td width=6%>字</td><td width=13% align=center></td><td width=50%>串行口COM4基地址</td><td width=25%></td>
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<td width=6%>08H</td><td width=6%>字</td><td width=13% align=center></td><td width=50%>并行打印适配器LPT1端口地址</td><td width=25%></td>
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<td width=6%>0AH</td><td width=6%>字</td><td width=13% align=center></td><td width=50%>并行打印适配器LPT2端口地址</td><td width=25%></td>
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<td width=6%>0CH</td><td width=6%>字</td><td width=13% align=center></td><td width=50%>并行打印适配器LPT3端口地址</td><td width=25%></td>
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<td width=6%>0EH</td><td width=6%>字</td><td width=13% align=center></td><td width=50%>并行打印适配器LPT4端口地址</td><td width=25%></td>
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<td width=6%>10H</td><td width=6%>字节</td><td width=13% align=center>**.. ....<br>..** ....<br><br><br>.... **..<br>.... .*..<br>.... ..*.<br>.... ...*</td><td width=50%>软盘驱动器数<br>显示方式:<br> 00:保留 01:40x25 彩色<br> 10:80x25 彩色 11:80x25 单色<br>PC:内存已安装 AT:保留<br>PC/AT:保留 PS/2:装有定点设备<br>装有8087/287/387协处理器<br>装有软盘驱动器</td><td width=25% rowspan=2>10H与11H两个字节为设备编码，调用BIOS中断11H可返回此信息</td>
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<td width=6%>11H</td><td width=6%>字节</td><td width=13% align=center>**.. ....<br>..*. ....<br>...* ....<br>.... ***.<br>.... ...*</td><td width=50%>打印机适配器号<br>便携机：内部调制解调器<br>装有游戏杆<br>RS232适配器号<br>保留</td>
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<td width=6%>12H</td><td width=6%>字节</td><td width=13% align=center></td><td width=50%>PC/AT：初始化信息；便携机：电源自检状态</td><td width=25%></td>
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<td width=6%>13H</td><td width=6%>字</td><td width=13% align=center></td><td width=50%>内存容量，以KB为单位</td><td width=25%></td>
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<td width=6%>15H</td><td width=6%>字</td><td width=13% align=center></td><td width=50%>PC/AT：保留；便携机：电池状态</td><td width=25%></td>
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<td width=6%>17H</td><td width=6%>字节</td><td width=13% align=center>*... ....<br>.*.. ....<br>..*. ....<br>...* ....<br>.... *...<br>.... .*..<br>.... ..*.<br>.... ...*</td><td width=50%>Insert状态<br>Caps Lock状态<br>Num Lock状态<br>Scroll Lock状态<br>Alt键按下<br>Ctrl键按下<br>Left Shift键按下<br>Right Shift键按下</td><td width=25% rowspan=2>17H与18H合称键盘状态字</td>
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<td width=6%>18H</td><td width=6%>字节</td><td width=13% align=center>*... ....<br>.*.. ....<br>..*. ....<br>...* ....<br>.... *...<br>.... .*..<br>.... ..*.<br>.... ...*</td><td width=50%>Insert键按下<br>Caps Lock键按下<br>Num Lock键按下<br>Scroll Lock键按下<br>Pause状态<br>仅在AT机上：SysRq键按下<br>仅在AT机上：Left Alt键按下<br>仅在AT机上：Left Ctrl键按下</td>
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<td width=6%>19H</td><td width=6%>字节</td><td width=13% align=center></td><td width=50%>用Alt+数字小键盘键入工作区</td><td width=25%></td>
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<td width=6%>1AH</td><td width=6%>字</td><td width=13% align=center></td><td width=50%>键盘缓冲区首地址</td><td width=25%></td>
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<td width=6%>1CH</td><td width=6%>字</td><td width=13% align=center></td><td width=50%>键盘缓冲区尾地址</td><td width=25%></td>
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<td colspan=9><i>Copyright &copy; 2004-2005 <a href="mailto:webmaster@nucstorm.com">Chunk Lee</a></i></td>
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