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2024-02-19 00:23:35 -05:00

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Int 4B/AX=8105h - Virtual DMA Specification - SCATTER/GATHER LOCK REGION -
AX = 8105h
DX = flags (see #03224)
ES:DI - Extended DMA descriptor structure (see #03222,#03223)
region size, linear segment, linear offset, and number avail
fields set
Return: CF clear if successful
EDDS number used field set
if DX bit 6 set, lower 12 bits of BX = offset in first page
CF set on error
AL = error code (see #03218)
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<h2>Int 4B/AX=8105h
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<h3><font color=#C00040>Virtual DMA Specification - SCATTER/GATHER LOCK REGION</font></h3>
<PRE>
AX = 8105h
DX = flags <a href="rb-6265.htm#Table3224" tppabs="http://www.ctyme.com/intr/rb-6265.htm#Table3224">(see #03224)</a>
ES:DI -> Extended DMA descriptor structure <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 #03222,#03223)
region size, linear segment, linear offset, and number avail
fields set<br>
<p><b>Return:</b><br>CF clear if successful
EDDS number used field set
if DX bit 6 set, lower 12 bits of BX = offset in first page
CF set on error
AL = error code <a href="rb-6262.htm#Table3218" tppabs="http://www.ctyme.com/intr/rb-6262.htm#Table3218">(see #03218)</a>
EDDS region size field filled with max length in bytes that can be
locked and described in the EDDS table
</PRE>
<p><b>BUG:</b>
Windows 3.0 in enhanced mode may return zero instead of the physical
page address for pages which were originally not present
<p><b>See Also:</b>
<a href="rb-6263.htm" tppabs="http://www.ctyme.com/intr/rb-6263.htm">AX=8103h</a> - <a href="rb-6266.htm" tppabs="http://www.ctyme.com/intr/rb-6266.htm">AX=8106h</a>
<PRE>
<p>
Bitfields for VDS flags:
<a name=table3224></a>
Bit(s) Description (Table 03224)
0-5 reserved (zero)
6 EDDS should be returned with page table entries
7 only present pages should be locked (not-present pages receive entry
of 0000h)
8-15 reserved (zero)
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