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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 33,21 - Reset Mouse Software</title>
+<meta name="FORMATTER" content="Microsoft FrontPage 2.0">
+</head>
+
+<body>
+
+<h1><a name="kap_interrupt_3480"></a>INT 33,21 - Reset Mouse
+Software</h1>
+
+<p> AX = 21h</p>
+
+<p> on return:</p>
+
+<p> AX = 0021 mouse driver not installed</p>
+
+<p> FFFF mouse driver installed</p>
+
+<p> BX = 2 mouse driver installed</p>
+
+<p> - similar to ~INT 33,0~ but does not reset the mouse hardware
+or</p>
+
+<p> display variables</p>
+
+<p> - both AX and BX must be correct for successful reset</p>
+
+<p> - interrupt routines set through ~INT 33,18~ are preserved</p>
+
+<p> - resets the mouse to the following defaults:</p>
+
+<p> . mouse is positioned to screen center</p>
+
+<p> . mouse cursor is reset and hidden</p>
+
+<p> . no interrupts are enabled (mask = 0)</p>
+
+<p> . double speed threshold set to 64 mickeys per second</p>
+
+<p> . horizontal mickey to pixel ratio (8 to 8)</p>
+
+<p> . vertical mickey to pixel ratio (16 to 8)</p>
+
+<p> . max width and height are set to maximum for video mode</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>