60 lines
1.4 KiB
HTML
60 lines
1.4 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 21,27 - Random Block Read Using FCB</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_1810"></a>INT 21,27 - Random Block
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Read Using FCB</h1>
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<p> AH = 27h</p>
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<p> CX = number of records to read</p>
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<p> DS:DX = pointer to an opened ~FCB~</p>
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<p> on return:</p>
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<p> AL = 00 if read was successful</p>
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<p> = 01 if EOF (no data read)</p>
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<p> = 02 if ~DTA~ is too small</p>
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<p> = 03 if EOF (partial record read)</p>
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<p> CX = actual number of records read</p>
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<p> - allows random access and sequential reading of a group</p>
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<p> of records from a file opened with an FCB into the DTA</p>
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<p> - FCB must be setup with drive id, filename, extension</p>
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<p> record length and random record number before call</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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