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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 33,14 - Swap Interrupt Subroutines</title>
+<meta name="FORMATTER" content="Microsoft FrontPage 2.0">
+</head>
+
+<body>
+
+<h1><a name="kap_interrupt_3350"></a>INT 33,14 - Swap Interrupt
+Subroutines</h1>
+
+<p> AX = 14h</p>
+
+<p> ES:DX = far pointer to user routine</p>
+
+<p> CX = user interrupt mask:</p>
+
+<p> <20>F-8<>7<EFBFBD>6<EFBFBD>5<EFBFBD>4<EFBFBD>3<EFBFBD>2<EFBFBD>1<EFBFBD>0<EFBFBD> user interrupt mask in CX</p>
+
+<p> <20> <20> <20> <20> <20> <20> <20> <20> +--- cursor position changed</p>
+
+<p> <20> <20> <20> <20> <20> <20> <20> +---- left button pressed</p>
+
+<p> <20> <20> <20> <20> <20> <20> +----- left button released</p>
+
+<p> <20> <20> <20> <20> <20> +------ right button pressed</p>
+
+<p> <20> <20> <20> <20> +------- right button released</p>
+
+<p> +--------------- unused</p>
+
+<p> on return:</p>
+
+<p> CX = previous user interrupt mask</p>
+
+<p> ES:DX = far pointer to previous user interrupt</p>
+
+<p> - routine at ES:DX is called if an event occurs and the</p>
+
+<p> corresponding bit specified in user mask is set</p>
+
+<p> - routine at ES:DX receives parameters in the following</p>
+
+<p> registers:</p>
+
+<p> AX = condition mask causing call</p>
+
+<p> CX = horizontal cursor position</p>
+
+<p> DX = vertical cursor position</p>
+
+<p> DI = horizontal counts</p>
+
+<p> SI = vertical counts</p>
+
+<p> DS = mouse driver data segment</p>
+
+<p> BX = button state:</p>
+
+<p> <20>F-2<>1<EFBFBD>0<EFBFBD></p>
+
+<p> <20> <20> +--- left button (1 = pressed)</p>
+
+<p> <20> +---- right button (1 = pressed)</p>
+
+<p> +------ unused</p>
+
+<p> - initial call mask and user routine should be restore on
+exit</p>
+
+<p> from user program</p>
+
+<p> - user program may need to set DS to it's own segment</p>
+
+<p> - see ~INT 33,C~</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>