203 lines
12 KiB
HTML
203 lines
12 KiB
HTML
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<TITLE>Int 21/AX=5D00h
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</TITLE>
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<META NAME="Description" CONTENT="
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Int 21/AX=5D00h - DOS 3.1+ internal - SERVER FUNCTION CALL -
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AX = 5D00h
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DS:DX - DOS parameter list (see #01686)
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DPL contains all register values for a call to INT 21h
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Return: as appropriate for function being called
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Notes: does not check AH. Out of range values will crash the system
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executes using specified computer ID and process ID
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sharing delay loops skipped
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a special sharing mode is enabled to handle FCBs opened across network
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wildcards are enabled for DELETE (AH=41h) and RENAME (AH=56h) under
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MS-DOS; under DR DOS 3.41, wildcards corrupt the filesystem; and
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">
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<center>
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<h2>Int 21/AX=5D00h
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<td><a href="alpha.htm" tppabs="http://www.ctyme.com/intr/alpha.htm">Contents</a></td>
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<p><img src="rbline.gif" tppabs="http://graphics.ctyme.com/gif/rbline.gif" width="100%" alt="------"><p>
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<h3><font color=#C00040>DOS 3.1+ internal - SERVER FUNCTION CALL</font></h3>
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<PRE>
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AX = 5D00h
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DS:DX -> DOS parameter list <a href="rb-3017.htm#Table1686" tppabs="http://www.ctyme.com/intr/rb-3017.htm#Table1686">(see #01686)</a>
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DPL contains all register values for a call to INT 21h<br>
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<p><b>Return:</b><br>As appropriate for function being called
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</PRE>
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<p><b>Notes:</b>
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Does not check AH. Out of range values will crash the system.
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Executes using specified computer ID and process ID.
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Sharing delay loops skipped.
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A special sharing mode is enabled to handle FCBs opened across network.
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Wildcards are enabled for DELETE (AH=41h) and RENAME (AH=56h) under
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MS-DOS; under DR DOS 3.41, wildcards corrupt the filesystem; and
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under DR DOS 5.0-6.0, the call returns error code 03h due to improper
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<PRE>
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<p><b>support for the server function call (refer to BUGS:</b><br>Section below).
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An extra file attribute parameter is enabled for OPEN (AH=3Dh),
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DELETE (AH=41h), and RENAME (AH=56h).
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Functions which take filenames require canonical names (as returned
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by AH=60h); this is apparently to prevent multi-hop file forwarding
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</PRE>
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<p><b>BUGS:</b>
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The OS/2 2.0 DOS Boot Session incorrectly maps DOS drive letters,
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seemingly ignoring HPFS drives.
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DR DOS 5.0-6.0 merely recursively call INT 21 after loading the
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registers from the DPL, leading to problems for peer-to-peer
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networks
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<p><b>See Also:</b>
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<a href="rb-2779.htm" tppabs="http://www.ctyme.com/intr/rb-2779.htm">AH=3Dh</a> - <a href="rb-2797.htm" tppabs="http://www.ctyme.com/intr/rb-2797.htm">AH=41h</a> - <a href="rb-2990.htm" tppabs="http://www.ctyme.com/intr/rb-2990.htm">AH=56h</a> - <a href="rb-3137.htm" tppabs="http://www.ctyme.com/intr/rb-3137.htm">AH=60h</a>
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<PRE>
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<p>
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Format of DOS parameter list:
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<a name=table1686></a>
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Offset Size Description (Table 01686)
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00h WORD AX
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02h WORD BX
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04h WORD CX
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06h WORD DX
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08h WORD SI
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0Ah WORD DI
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0Ch WORD DS
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0Eh WORD ES
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10h WORD reserved (0)
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12h WORD computer ID (0 = current system)
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14h WORD process ID (PSP segment on specified computer)
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</PRE>
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<p><b>Note:</b>
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Under Windows Enhanced mode, the computer ID is normally the virtual
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machine ID (see INT 2F/AX=1683h), though this can reportedly be
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changed by setting UniqueDOSPSP= in SYSTEM.INI
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<p>
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<b>Category: <a href="cat-010.htm" tppabs="http://www.ctyme.com/intr/cat-010.htm">
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DOS Kernel</a>
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- <a href="int-21.htm" tppabs="http://www.ctyme.com/intr/int-21.htm">
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Int 21h</a>
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D</a>
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