69 lines
1.7 KiB
HTML
69 lines
1.7 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
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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 21,51 - Get Current Process ID (Undocumented DOS 2.</title>
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<meta name="FORMATTER" content="Microsoft FrontPage 2.0">
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<h1><a name="kap_interrupt_2400"></a>INT 21,51 - Get Current
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Process ID (Undocumented DOS 2.x)</h1>
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<p> AH = 51h</p>
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<p> on return:</p>
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<p> BX = process ID</p>
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<p> - The process ID number is actually the segment address of
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program's</p>
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<p> PSP. This in conjunction with ~INT 21,50~ is useful for TSR's
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to</p>
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<p> access their own file handle table in their respective ~PSP~.</p>
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<p> - this function cannot be called while in an ~INT 28~ handler
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in</p>
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<p> DOS 2.x unless the critical error flag is set or stack
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corruption</p>
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<p> will occur</p>
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<p> - ~INT 21,62~ is highly recommended for DOS 3.x due to a
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possible bug</p>
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<p> when activated from a TSR. DOS may switch to the wrong
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internal</p>
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<p> stack which may cause a problems with TSR's if called during
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an</p>
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<p> INT 28.</p>
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<p> - see INT 21,62 (Get PSP segment) for DOS 3.x applications</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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