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<td></td><td>-336-</td><td></td> <!頁碼>
<td colspan=6>PC機匯編語言實戰(zhàn)精解</td><td colspan=4></td><td colspan=6 align="right"><img src="icons/flag.gif"></td> <!書名>
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<td colspan=18><font face="黑體"><a name="BBB">附錄D BIOS數(shù)據(jù)區(qū)</a></font></td>
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<td width=6%>偏移</td><td width=6%>長度</td><td width=13% align=center>位定義<br>7654 3210</td><td width=50%>說明</td><td width=25%>備注</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%>并行打印適配器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%>并行打印適配器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%>并行打印適配器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%>并行打印適配器LPT4端口地址</td><td width=25%></td>
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<td width=6%>10H</td><td width=6%>字節(jié)</td><td width=13% align=center>**.. ....<br>..** ....<br><br><br>.... **..<br>.... .*..<br>.... ..*.<br>.... ...*</td><td width=50%>軟盤驅(qū)動器數(shù)<br>顯示方式:<br> 00:保留 01:40x25 彩色<br> 10:80x25 彩色 11:80x25 單色<br>PC:內(nèi)存已安裝 AT:保留<br>PC/AT:保留 PS/2:裝有定點設(shè)備<br>裝有8087/287/387協(xié)處理器<br>裝有軟盤驅(qū)動器</td><td width=25% rowspan=2>10H與11H兩個字節(jié)為設(shè)備編碼，調(diào)用BIOS中斷11H可返回此信息</td>
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<td width=6%>11H</td><td width=6%>字節(jié)</td><td width=13% align=center>**.. ....<br>..*. ....<br>...* ....<br>.... ***.<br>.... ...*</td><td width=50%>打印機適配器號<br>便攜機：內(nèi)部調(diào)制解調(diào)器<br>裝有游戲桿<br>RS232適配器號<br>保留</td>
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<td width=6%>12H</td><td width=6%>字節(jié)</td><td width=13% align=center></td><td width=50%>PC/AT：初始化信息；便攜機：電源自檢狀態(tài)</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%>內(nèi)存容量，以KB為單位</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；便攜機：電池狀態(tài)</td><td width=25%></td>
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<td width=6%>17H</td><td width=6%>字節(jié)</td><td width=13% align=center>*... ....<br>.*.. ....<br>..*. ....<br>...* ....<br>.... *...<br>.... .*..<br>.... ..*.<br>.... ...*</td><td width=50%>Insert狀態(tài)<br>Caps Lock狀態(tài)<br>Num Lock狀態(tài)<br>Scroll Lock狀態(tài)<br>Alt鍵按下<br>Ctrl鍵按下<br>Left Shift鍵按下<br>Right Shift鍵按下</td><td width=25% rowspan=2>17H與18H合稱鍵盤狀態(tài)字</td>
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<td width=6%>18H</td><td width=6%>字節(jié)</td><td width=13% align=center>*... ....<br>.*.. ....<br>..*. ....<br>...* ....<br>.... *...<br>.... .*..<br>.... ..*.<br>.... ...*</td><td width=50%>Insert鍵按下<br>Caps Lock鍵按下<br>Num Lock鍵按下<br>Scroll Lock鍵按下<br>Pause狀態(tài)<br>僅在AT機上：SysRq鍵按下<br>僅在AT機上：Left Alt鍵按下<br>僅在AT機上：Left Ctrl鍵按下</td>
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<td width=6%>19H</td><td width=6%>字節(jié)</td><td width=13% align=center></td><td width=50%>用Alt+數(shù)字小鍵盤鍵入工作區(qū)</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%>鍵盤緩沖區(qū)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%>鍵盤緩沖區(qū)尾地址</td><td width=25%></td>
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