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<td></td><td>-328-</td><td></td> <!頁(yè)碼>
<td colspan=6>PC機(jī)匯編語(yǔ)言實(shí)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="AAA">附錄A 21H中斷功能調(diào)用</a></font></td>
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<td width=5%>AH</td><td width=35%>功能</td><td width=30%>調(diào)用參數(shù)</td><td width=30%>返回參數(shù)</td>
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<td width=5%>00</td><td width=35%>終止進(jìn)程</td><td width=30%>CS=程序段前綴段地址</td><td width=30%></td>
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<td width=5%>01</td><td width=35%>帶回顯的鍵盤輸入</td><td width=30%></td><td width=30%>AL=輸入字符</td>
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<td width=5%>02</td><td width=35%>顯示一個(gè)字符</td><td width=30%>DL=待輸出字符的ASCII碼</td><td width=30%></td>
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<td width=5%>03</td><td width=35%>異步通訊輸入</td><td width=30%></td><td width=30%>AL=輸入的數(shù)據(jù)</td>
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<td width=5%>04</td><td width=35%>異步通訊輸出</td><td width=30%>DL=待輸出的數(shù)據(jù)</td><td width=30%></td>
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<td width=5%>05</td><td width=35%>打印機(jī)輸出</td><td width=30%>DL=待輸出的字符</td><td width=30%></td>
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<td width=5%>06</td><td width=35%>直接控制臺(tái)I/O</td><td width=30%>DL=0FFH：輸入<br>DL=字符的ASCII碼：輸出</td><td width=30%>AL=輸入的字符</td>
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<td width=5%>07</td><td width=35%>無(wú)回顯的鍵盤輸入</td><td width=30%></td><td width=30%>AL=輸入的字符</td>
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<td width=5%>08</td><td width=35%>無(wú)回顯的鍵盤輸入（檢測(cè)Ctrl-C）</td><td width=30%></td><td width=30%>AL=輸入的字符</td>
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<td width=5%>09</td><td width=35%>字符串輸出</td><td width=30%>DS:DX=字符串首</td><td width=30%></td>
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<td width=5%>0A</td><td width=35%>鍵盤輸入至緩沖區(qū)</td><td width=30%>DS:DX=緩沖區(qū)首<br>DS:[DX]=緩沖區(qū)最大容量</td><td width=30%>DS:[DX+1]=輸入的字符數(shù)<br>DS:DX+2=字符串首</td>
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<td width=5%>0B</td><td width=35%>檢測(cè)鍵盤狀態(tài)</td><td width=30%></td><td width=30%>AL=00：有輸入<br>AL=FF：無(wú)輸入</td>
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<td width=5%>0C</td><td width=35%>清除緩沖區(qū)并請(qǐng)求指定的輸入功能</td><td width=30%>AL=輸入功能的功能號(hào)<br>（1、6、7、8、A）</td><td width=30%></td>
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<td width=5%>0D</td><td width=35%>磁盤復(fù)位</td><td width=30%></td><td width=30%>清除文件緩沖區(qū)</td>
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<td width=5%>0E</td><td width=35%>指定當(dāng)前缺省磁盤驅(qū)動(dòng)器</td><td width=30%>DL=驅(qū)動(dòng)器號(hào)0：A；1：B</td><td width=30%></td>
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<td width=5%>0F</td><td width=35%>打開文件</td><td width=30%>DS:DX=FCB首地址</td><td width=30%>AL=00：文件打開<br>AL=0FFH：出錯(cuò)</td>
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<td width=5%>10</td><td width=35%>關(guān)閉文件</td><td width=30%>DS:DX=FCB首地址</td><td width=30%>AL=00：文件關(guān)閉<br>AL=FF：出錯(cuò)</td>
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<td width=5%>11</td><td width=35%>查找第一個(gè)目錄項(xiàng)</td><td width=30%>DS:DX=FCB首地址</td><td width=30%>AL=00：找到<br>AL=FF：出錯(cuò)</td>
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<td width=5%>12</td><td width=35%>查找下一個(gè)目錄項(xiàng)</td><td width=30%>DS:DX=FCB首地址<br>（文件名中帶*或?）</td><td width=30%>AL=00：找到<br>AL=FF：出錯(cuò)</td>
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<td width=5%>13</td><td width=35%>刪除文件</td><td width=30%>DS:DX=FCB首地址</td><td width=30%>AL=00：成功刪除<br>AL=FF：出錯(cuò)</td>
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<td width=5%>14</td><td width=35%>順序讀</td><td width=30%>DS:DX=FCB首地址</td><td width=30%>AL=00：讀成功<br>AL=01：文件已到末尾<br>AL=02：DTA溢出<br>AL=03：讀入部分?jǐn)?shù)據(jù)</td>
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<td width=5%>15</td><td width=35%>順序?qū)?lt;/td><td width=30%>DS:DX=FCB首地址</td><td width=30%>AL=00：寫成功<br>AL=01：磁盤滿<br>AL=02：DTA溢出</td>
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<td width=5%>16</td><td width=35%>建立文件</td><td width=30%>DS:DX=FCB首地址</td><td width=30%>AL=00：文件成功建立<br>AL=FF：出錯(cuò)</td>
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<td width=5%>17</td><td width=35%>文件改名</td><td width=30%>DS:DX=特殊的FCB首地址</td><td width=30%>AL=00：改名成功<br>AL=FF：出錯(cuò)</td>
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<td width=5%>19</td><td width=35%>取當(dāng)前缺省驅(qū)動(dòng)器名</td><td width=30%></td><td width=30%>AL=缺省驅(qū)動(dòng)器號(hào)<br>0：A；1：B；...</td>
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<td width=5%>1A</td><td width=35%>置DTA地址</td><td width=30%>DS:DX=DTA首地址</td><td width=30%></td>
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<td colspan=9><i>Copyright © 2004-2005 <a href="mailto:webmaster@nucstorm.com">Chunk Lee</a></i></td>
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