71 lines
1.7 KiB
HTML
71 lines
1.7 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 2A,80 - Begin DOS Critical Section</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_2980"></a>INT 2A,80 - Begin DOS
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Critical Section</h1>
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<p> AH = 80h</p>
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<p> AL = critical section identifier (00-0F)</p>
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<p> = 01 DOS kernel, SHARE.EXE and network data structure
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integrity</p>
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<p> = 02 DOS kernel, device driver exclusivity</p>
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<p> = 05 IFSFUNC (Installable File System, IFS, DOS 4.0+)</p>
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<p> = 06 IFSFUNC (Installable File System, IFS, DOS 4.0+)</p>
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<p> = 08 ASSIGN.COM</p>
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<p> </p>
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<p> returns nothing</p>
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<p> - indicates that the region of code being entered should not
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be</p>
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<p> interrupted and identifies the critical region</p>
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<p> - this function is not normally called by user applications
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but is</p>
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<p> often hooked to monitor if DOS is in a critical section</p>
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<p> - this information is necessary to reenter DOS using the
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swappable</p>
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<p> data area returned by ~INT 21,5D~ subfunction 0B</p>
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<p> - see ~Bibliography~ reference to "Undocumented
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DOS"</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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