186 lines
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186 lines
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<TITLE>Int 2F/AX=1001h
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<META NAME="Description" CONTENT="
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Int 2F/AX=1001h - DR DOS 6.0+ FDOS EXTENSIONS - INSTALL FDOS HOOK (SHARE / DELWATCH) -
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AX = 1001h
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DX:BX - new FDOS stub entry function
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Return: nothing
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Notes: the default handler for the pointer set by this call under DELWATCH
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simply returns with CF set
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In Digital Research terminology FDOS is the part of the BDOS kernel
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(IBMDOS.COM) responsible for the file system and related tasks, and
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its functionality is also used by the BDOS kernel itself. However,
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for reasons of performance and code size, it uses direct calling.
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This interrupt allows external components like SHARE file locking or
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<h2>Int 2F/AX=1001h
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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>DR DOS 6.0+ FDOS EXTENSIONS - INSTALL FDOS HOOK (SHARE / DELWATCH)</font></h3>
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<PRE>
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AX = 1001h
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DX:BX -> new FDOS stub entry function<br>
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<p><b>Return:</b><br>Nothing
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</PRE>
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<p><b>Notes:</b>
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The default handler for the pointer set by this call under DELWATCH
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simply returns with CF set.
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In Digital Research terminology FDOS is the part of the BDOS kernel
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(IBMDOS.COM) responsible for the file system and related tasks, and
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its functionality is also used by the BDOS kernel itself. However,
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for reasons of performance and code size, it uses direct calling..
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This interrupt allows external components like SHARE file locking or
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DELWATCH delete tracking software to hook into the internal backdoor
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INT 2F/AH=10h/AL<=09h chain in the kernel, so that they can actually
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allows the kernel to ensure that several conditions are met when
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passing control to these registered components including proper
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maintaining A20, re-enterancy, or critical section mutexing
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(e.g. getting the disk sub-system queue "MXdisk")..
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The default handler in the BDOS just sets the carry flag and returns..
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Currently known clients to this shared interface are DR DOS 6.0
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SHARE 1.xx, DR DOS 6.0+ DELWATCH 1.00+, which both chain onto
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the same call far address, and the version of AddStor's SuperStor
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which is bundled with DR DOS 6.0.
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However, the DR PalmDOS, and Novell DOS 7 - DR-DOS 7.03 SHARE 2.00-2.05
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do not use this function to hook into the system. Instead they fix up
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the share stubs directly. DR PalmDOS SHARE 2.00 uses the stubs at
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Table !!! INT 21/AH=52h, while Novell DOS 7 - DR-DOS 7.03
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SHARE 2.01-2.05 use the private set of share stubs at Table !!! at
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INT 21/AX=4458h). Future releases may possibly again fix up the
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share stubs at INT 21/AH=52h.
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<p><b>See Also:</b>
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<a href="rb-4284.htm" tppabs="http://www.ctyme.com/intr/rb-4284.htm">AX=1000h</a> - <a href="rb-5691.htm" tppabs="http://www.ctyme.com/intr/rb-5691.htm">AX=F800h</a>
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<p>
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<b>Category: <a href="cat-008.htm" tppabs="http://www.ctyme.com/intr/cat-008.htm">
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Disk I/O Enhancements</a>
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- <a href="int-2f-1.htm" tppabs="http://www.ctyme.com/intr/int-2F.htm">
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Int 2Fh</a>
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- <a href="alpha-d.htm" tppabs="http://www.ctyme.com/intr/alpha-d.htm">
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D</a>
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