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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 1A,0 - Read System Clock Counter</title>
<meta name="FORMATTER" content="Microsoft FrontPage 2.0">
</head>
<body>
<h1><a name="kap_interrupt_1240"></a>INT 1A,0 - Read System Clock
Counter</h1>
<p> AH = 00</p>
<p> on return:</p>
<p> AL = midnight flag, 1 if 24 hours passed since reset</p>
<p> CX = high order word of tick count</p>
<p> DX = low order word of tick count</p>
<p> - incremented approximately 18.206 times per second</p>
<p> - at midnight CX:DX is zero</p>
<p> - this function can be called in a program to assure the date
is</p>
<p> updated after midnight; this will avoid the passing two
midnights</p>
<p> date problem</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>