91 lines
2.2 KiB
HTML
91 lines
2.2 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 21,69 - Get/Set Disk Serial Number (Undocumented DOS
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4+)</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_2780"></a>INT 21,69 - Get/Set Disk
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Serial Number (Undocumented DOS 4+)</h1>
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<p> AH = 69h</p>
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<p> AL = 00 get serial number</p>
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<p> = 01 set serial number</p>
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<p> BL = drive (0 = default, 1=A:, 2 = B:, ... )</p>
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<p> DS:DX = buffer to contain extended BIOS Parameter Block
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(~BPB~, AL=0)</p>
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<p> = disk information to set of the form:</p>
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<p> % Offset Size Description</p>
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<p> 00 word info level (zero)</p>
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<p> 02 dword disk serial number (binary)</p>
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<p> 06 11bytes volume label or "NO NAME " if not
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present</p>
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<p> 11 8bytes filesystem type string "FAT12 " or
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"FAT16 "</p>
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<p> returns:</p>
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<p> CF = set on error</p>
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<p> AX = error code if CF set</p>
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<p> = 01 network drive not supported</p>
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<p> = 05 no extended BPB found on disk</p>
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<p> CF = clear if successful and value in AX is destroyed</p>
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<p> AL = 00 buffer filled from Extended BPB on disk</p>
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<p> = 01 disk Extended BPB updated from buffer</p>
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<p> DS:DX = pointer to returned data, when AL = 0</p>
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<p> - copies data from Extended BIOS Parameter Block to buffer</p>
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<p> - no critical error is generated on error</p>
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<p> - does not work on network drives (returns 01)</p>
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<p> - returned buffer (after offset 2) is similar to offsets 27
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through</p>
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<p> 3D of the Extended BPB found in the boot record</p>
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<p> - see ~INT 21,59~</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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