84 lines
2.0 KiB
HTML
84 lines
2.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type"
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content="text-html; charset=Windows-1252">
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<title>INT 13,18 - Set Media Type for Format (BIOS date specific)</title>
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<meta name="FORMATTER" content="Microsoft FrontPage 2.0">
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</head>
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<body>
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<h1><a name="kap_interrupt_0640"></a>INT 13,18 - Set Media Type
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for Format (BIOS date specific)</h1>
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<p> AH = 18h</p>
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<p> CH = lower 8 bits of number of tracks (0-1023 dec., see
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below)</p>
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<p> CL = sectors per track (1-17 dec., see below)</p>
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<p> DL = drive number (0=A:, 1=2nd floppy, 80h=drive 0, 81h=drive
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1)</p>
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<p> on return:</p>
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<p> ES:DI = pointer to 11-byte ~Disk Base Table~ (DBT)</p>
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<p> AH = 00h if requested combination supported</p>
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<p> = 01h if function not available</p>
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<p> = 0Ch if not supported or drive type unknown</p>
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<p> = 80h if there is no media in the drive</p>
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<p> CF = 0 if successful</p>
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<p> = 1 if error</p>
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<p> - valid only for XT BIOS dated after 1/10/86, AT after
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11/15/86,</p>
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<p> XT 286 and the PS/2 line</p>
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<p> - only disk number is checked for validity</p>
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<p> - track number is a 10 bit value taken from the 2 high order</p>
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<p> bits of CL and the 8 bits in CH (low order 8 bits of track):</p>
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<p> ¦F¦E¦D¦C¦B¦A¦9¦8¦7¦6¦5¦4¦3¦2¦1¦0¦ CX</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ +-------------- sectors per
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track count</p>
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<p> ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ +-------------- high order 2 bits
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track/cyl count</p>
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<p> +-------------------------- low order 8 bits of track/cyl
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count</p>
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<p> - see ~INT 13,STATUS~</p>
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<hr>
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<table border="0" width="100%" cols="3">
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<tr>
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<td width="33%">Zurück zum <a href="inte1at0.htm">Interrupt
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Info</a>. </td>
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<td align="center" width="33%"><a
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href="mailto:Roger.Morgan@htl-steyr.ac.at">Roger Morgan</a>
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/ 1998 </td>
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<td align="right" width="33%"><font size="1">L.Änderung <!--webbot
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bot="Timestamp" s-type="EDITED" s-format="%d.%m.%y"
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startspan -->29.03.99<!--webbot bot="Timestamp" endspan
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i-checksum="13964" --> </font></td>
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</tr>
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</table>
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</body>
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</html>
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