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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 21,44,0 / IOCTL,0 - Get Device Information</title>
+<meta name="FORMATTER" content="Microsoft FrontPage 2.0">
+</head>
+
+<body>
+
+<h1><a name="kap_interrupt_2110"></a>INT 21,44,0 / IOCTL,0 - Get
+Device Information</h1>
+
+<p> AH = 44h</p>
+
+<p> AL = 00</p>
+
+<p> BX = handle (must be an opened device)</p>
+
+<p> on return</p>
+
+<p> AX = error code if CF set (see ~DOS ERROR CODES~)</p>
+
+<p> DX = device information (see tables below)</p>
+
+<p> <20>F<EFBFBD>E<EFBFBD>D<EFBFBD>C<EFBFBD>B<EFBFBD>A-8<>7<EFBFBD>6<EFBFBD>5-0<> DX Block Device Information</p>
+
+<p> <20> <20> <20> <20> <20> <20> <20> <20> +----- drive number (0=A:,1=B:)</p>
+
+<p> <20> <20> <20> <20> <20> <20> <20> +------- 0 = file has been written</p>
+
+<p> <20> <20> <20> <20> <20> <20> +-------- 0 = disk file; 1 = character
+device</p>
+
+<p> <20> <20> <20> <20> <20> +---------- reserved, must be zero</p>
+
+<p> <20> <20> <20> <20> +------------ 1 = media not removable</p>
+
+<p> <20> <20> <20> +------------- 1 = network device (DOS 3.x+)</p>
+
+<p> <20> <20> +-------------- 1 = reserved</p>
+
+<p> <20> +--------------- 1 = don't update file time or date (DOS
+4.x+)</p>
+
+<p> +---------------- 1 = file is remote (DOS 3.x+)</p>
+
+<p> <20>F<EFBFBD>E<EFBFBD>D<EFBFBD>C<EFBFBD>B<EFBFBD>A-8<>7<EFBFBD>6<EFBFBD>5<EFBFBD>4<EFBFBD>3<EFBFBD>2<EFBFBD>1<EFBFBD>0<EFBFBD> DX Character
+Device Information</p>
+
+<p> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> +---- 1 = standard
+input device</p>
+
+<p> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> +---- 1 = standard output
+device</p>
+
+<p> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> +---- 1 = NUL device</p>
+
+<p> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> +---- 1 = clock device</p>
+
+<p> <20> <20> <20> <20> <20> <20> <20> <20> <20> +---- uses DOS ~INT 29~ for fast
+character output</p>
+
+<p> <20> <20> <20> <20> <20> <20> <20> <20> +---- 1 = binary mode, 0 = translated</p>
+
+<p> <20> <20> <20> <20> <20> <20> <20> +---- 0 = end of file on input</p>
+
+<p> <20> <20> <20> <20> <20> <20> +---- 1 = character device, 0 if disk file</p>
+
+<p> <20> <20> <20> <20> <20> +----- reserved</p>
+
+<p> <20> <20> <20> <20> +------ 1 = media not removable</p>
+
+<p> <20> <20> <20> +------ 1 = network device (DOS 3.x+)</p>
+
+<p> <20> <20> +------ reserved</p>
+
+<p> <20> +------ 1 = supports IOCTL, via functions 2 &amp; 3</p>
+
+<p> +------ reserved</p>
+
+<p> - BIT 7 of register DX can be used to detect if STDIN/STDOUT
+is</p>
+
+<p> redirected to/from disk; if a call to this function has DX
+BIT 7</p>
+
+<p> set it's not redirected from/to disk; if it's clear then it
+is</p>
+
+<p> redirected to/from disk</p>
+
+<p> - BIT B of register DX can be used to determine if a drive is</p>
+
+<p> removable.</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>