57 lines
1.4 KiB
HTML
57 lines
1.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
|
|
|
|
<html>
|
|
|
|
<head>
|
|
<meta http-equiv="Content-Type"
|
|
content="text-html; charset=Windows-1252">
|
|
<title>INT 21,64 - Set Device Driver Look Ahead (Undocumented)</title>
|
|
<meta name="FORMATTER" content="Microsoft FrontPage 2.0">
|
|
</head>
|
|
|
|
<body>
|
|
|
|
<h1><a name="kap_interrupt_2730"></a>INT 21,64 - Set Device
|
|
Driver Look Ahead (Undocumented)</h1>
|
|
|
|
<p> AH = 64h</p>
|
|
|
|
<p> AL = value for switch</p>
|
|
|
|
<p> 00 causes DOS to perform look ahead to the device driver</p>
|
|
|
|
<p> before execution of ~INT 21,1~, ~INT 21,8~ and ~INT 21,A~</p>
|
|
|
|
<p> other - no look ahead is performed</p>
|
|
|
|
<p> returns ???</p>
|
|
|
|
<p> - DOS internal; should not be called by user program</p>
|
|
|
|
<p> - switch defaults to zero</p>
|
|
|
|
<p> - undocumented; since DOS 3.3</p>
|
|
|
|
<p> - some other subfunctions are know to have existed since DOS
|
|
3.2 but</p>
|
|
|
|
<p> details on their functionality are incomplete</p>
|
|
|
|
<hr>
|
|
|
|
<table border="0" width="100%" cols="3">
|
|
<tr>
|
|
<td width="33%">Zurück zum <a href="inte1at0.htm">Interrupt
|
|
Info</a>. </td>
|
|
<td align="center" width="33%"><a
|
|
href="mailto:Roger.Morgan@htl-steyr.ac.at">Roger Morgan</a>
|
|
/ 1998 </td>
|
|
<td align="right" width="33%"><font size="1">L.Änderung <!--webbot
|
|
bot="Timestamp" s-type="EDITED" s-format="%d.%m.%y"
|
|
startspan -->29.03.99<!--webbot bot="Timestamp" endspan
|
|
i-checksum="13964" --> </font></td>
|
|
</tr>
|
|
</table>
|
|
</body>
|
|
</html>
|