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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 21,3F - Read From File or Device Using Handle</title>
+<meta name="FORMATTER" content="Microsoft FrontPage 2.0">
+</head>
+
+<body>
+
+<h1><a name="kap_interrupt_2050"></a>INT 21,3F - Read From File
+or Device Using Handle</h1>
+
+<p> AH = 3F</p>
+
+<p> BX = file handle</p>
+
+<p> CX = number of bytes to read</p>
+
+<p> DS:DX = pointer to read buffer</p>
+
+<p> on return:</p>
+
+<p> AX = number of bytes read is CF not set</p>
+
+<p> = error code if CF set (see ~DOS ERROR CODES~)</p>
+
+<p> - read specified number of bytes from file into buffer DS:DX</p>
+
+<p> - when AX is not equal to CX then a partial read occurred due</p>
+
+<p> to end of file</p>
+
+<p> - if AX is zero, no data was read, and EOF occurred before
+read</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>