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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 13,5 - Format Disk Track</title>
+<meta name="FORMATTER" content="Microsoft FrontPage 2.0">
+</head>
+
+<body>
+
+<h1><a name="kap_interrupt_0460"></a>INT 13,5 - Format Disk Track</h1>
+
+<p> AH = 05</p>
+
+<p> AL = interleave value (XT only)</p>
+
+<p> CX = track/cylinder number (see below for format)</p>
+
+<p> DH = head number (0-15 dec.)</p>
+
+<p> DL = drive number (0=A:, 1=2nd floppy, 80h=drive 0, 81h=drive
+1)</p>
+
+<p> ES:BX = pointer to block of &quot;track address fields&quot;
+containing</p>
+
+<p> four byte fields for each sector to be formatted of the form:</p>
+
+<p> 1 byte track number</p>
+
+<p> 1 byte head number Size #</p>
+
+<p> 1 byte sector number Codes Bytes</p>
+
+<p> 1 byte sector size code 0 128</p>
+
+<p> 1 256</p>
+
+<p> 2 512</p>
+
+<p> 3 1024</p>
+
+<p> on return:</p>
+
+<p> AH = status (see ~INT 13,STATUS~)</p>
+
+<p> CF = 0 if successful</p>
+
+<p> = 1 if error</p>
+
+<p> - BIOS disk write attempts should reset the controller on
+error</p>
+
+<p> - ~INT 13,17~ should be called to set the DASD type</p>
+
+<p> - this function is capable of doing great damage if the
+parameters</p>
+
+<p> are incorrectly specified; only the drive number is checked</p>
+
+<p> - initializes disk address fields and data sectors</p>
+
+<p> - interleave is specified by ordering of track address fields</p>
+
+<p> - after INT 13 disk format, if the disk is to be used with
+DOS the</p>
+
+<p> DOS data structure must be written</p>
+
+<p> - only the disk number is checked for validity</p>
+
+<p> - the parameters in CX change depending on the number of
+cylinders;</p>
+
+<p> the track/cylinder number is a 10 bit value taken from the 2
+high</p>
+
+<p> order bits of CL and the 8 bits in CH (low order 8 bits of
+track):</p>
+
+<p> <20>F<EFBFBD>E<EFBFBD>D<EFBFBD>C<EFBFBD>B<EFBFBD>A<EFBFBD>9<EFBFBD>8<EFBFBD>7<EFBFBD>6<EFBFBD>5-0<> CX (cylinder value
+0-1023 dec.)</p>
+
+<p> <20> <20> <20> <20> <20> <20> <20> <20> <20> <20> +----- unused</p>
+
+<p> <20> <20> <20> <20> <20> <20> <20> <20> +--------- high order 2 bits of
+track/cylinder</p>
+
+<p> +------------------------ low order 8 bits of track/cyl
+number</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>