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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 21,27 - Random Block Read Using FCB</title>
<meta name="FORMATTER" content="Microsoft FrontPage 2.0">
</head>
<body>
<h1><a name="kap_interrupt_1810"></a>INT 21,27 - Random Block
Read Using FCB</h1>
<p> AH = 27h</p>
<p> CX = number of records to read</p>
<p> DS:DX = pointer to an opened ~FCB~</p>
<p> on return:</p>
<p> AL = 00 if read was successful</p>
<p> = 01 if EOF (no data read)</p>
<p> = 02 if ~DTA~ is too small</p>
<p> = 03 if EOF (partial record read)</p>
<p> CX = actual number of records read</p>
<p> - allows random access and sequential reading of a group</p>
<p> of records from a file opened with an FCB into the DTA</p>
<p> - FCB must be setup with drive id, filename, extension</p>
<p> record length and random record number before call</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>