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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<meta http-equiv="Content-Type"
content="text-html; charset=Windows-1252">
<title>INT 21,3D - Open File Using Handle</title>
<meta name="FORMATTER" content="Microsoft FrontPage 2.0">
</head>
<body>
<h1><a name="kap_interrupt_2030"></a>INT 21,3D - Open File Using
Handle</h1>
<p> AH = 3D</p>
<p> AL = open access mode</p>
<p> 00 read only</p>
<p> 01 write only</p>
<p> 02 read/write</p>
<p> DS:DX = pointer to an ASCIIZ file name</p>
<p> on return:</p>
<p> AX = file handle if CF not set</p>
<p> = error code if CF set (see ~DOS ERROR CODES~)</p>
<p> % Access modes in AL:</p>
<p> <20>7<EFBFBD>6<EFBFBD>5<EFBFBD>4<EFBFBD>3<EFBFBD>2<EFBFBD>1<EFBFBD>0<EFBFBD> AL</p>
<p> <20> <20> <20> <20> <20> +-------- read/write/update access mode</p>
<p> <20> <20> <20> <20> +--------- reserved, always 0</p>
<p> <20> +-------------- sharing mode (see below) (DOS 3.1+)</p>
<p> +--------------- 1 = private, 0 = inheritable (DOS 3.1+)</p>
<p> % Sharing mode bits (DOS 3.1+): Access mode bits:</p>
<p> % 654 210</p>
<p> 000 compatibility mode (exclusive) 000 read access</p>
<p> 001 deny others read/write access 001 write access</p>
<p> 010 deny others write access 010 read/write access</p>
<p> 011 deny others read access</p>
<p> 100 full access permitted to all</p>
<p> - will open normal, hidden and system files</p>
<p> - file pointer is placed at beginning of file</p>
<hr>
<table border="0" width="100%" cols="3">
<tr>
<td width="33%">Zur<EFBFBD>ck 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.<2E>nderung <!--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>