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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>DOS 3.</title>
<meta name="FORMATTER" content="Microsoft FrontPage 2.0">
</head>
<body>
<h1><a name="kap_interrupt_2420"></a>DOS 3.0 Specific Information</h1>
<p> % Offset Size Description</p>
<p> 10 byte number of block devices</p>
<p> 11 word max sector size used by DOS prior to loading block</p>
<p> device drivers; limits allowable device sector size</p>
<p> 13 dword pointer to DOS cache buffer header</p>
<p> 17 dword pointer to drive information table</p>
<p> 1B byte value of LASTDRIVE command in CONFIG.SYS</p>
<p> 1C dword pointer to STRING= workspace area</p>
<p> 20 word size of STRING area (CONFIG.SYS value of STRING=x)</p>
<p> 22 dword ~FCB~ file table pointer</p>
<p> 26 word number of protected FCBs</p>
<p> 28 18bytes NUL device header, first 4 bytes of device header</p>
<p> point to the next device in device chain</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>