168 lines
11 KiB
HTML
168 lines
11 KiB
HTML
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<TITLE>Int 21/AH=46h
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<META NAME="Description" CONTENT="
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Int 21/AH=46h - DOS 2+ - DUP2, FORCEDUP - FORCE DUPLICATE FILE HANDLE -
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AH = 46h
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BX = file handle
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CX = file handle to become duplicate of first handle
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Return: CF clear if successful
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CF set on error
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AX = error code (04h,06h) (see #01680 at AH=59h/BX=0000h)
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Notes: closes file with handle CX if it is still open
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DOS 3.30 hangs if BX=CX on entry
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moving file pointer for either handle will also move it for the other,
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because both will refer to the same system file table
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">
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<center>
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<h2>Int 21/AH=46h
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</h2>
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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 2+ - DUP2, FORCEDUP - FORCE DUPLICATE FILE HANDLE</font></h3>
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<PRE>
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AH = 46h
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BX = file handle
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CX = file handle to become duplicate of first handle<br>
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<p><b>Return:</b><br>CF clear if successful
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CF set on error
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AX = error code (04h,06h) <a href="javascript:if(confirm('http://www.ctyme.com/intr/rb-0000.htm \n\nThis file was not retrieved by Teleport Pro, because it was unavailable, or its retrieval was aborted, or the project was stopped too soon. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/intr/rb-0000.htm#Table0'" tppabs="http://www.ctyme.com/intr/rb-0000.htm#Table0"></a>(see #01680 at AH=59h/BX=0000h)
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</PRE>
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<p><b>Notes:</b>
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Closes file with handle CX if it is still open.
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DOS 3.30 hangs if BX=CX on entry.
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Moving file pointer for either handle will also move it for the other,
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because both will refer to the same system file table
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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-2931.htm" tppabs="http://www.ctyme.com/intr/rb-2931.htm">AH=45h</a>
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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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<td><a href="alpha.htm" tppabs="http://www.ctyme.com/intr/alpha.htm">Contents</a></td>
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