183 lines
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183 lines
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<TITLE>Int 4B/AX=8105h
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<META NAME="Description" CONTENT="
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Int 4B/AX=8105h - Virtual DMA Specification - SCATTER/GATHER LOCK REGION -
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AX = 8105h
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DX = flags (see #03224)
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ES:DI - Extended DMA descriptor structure (see #03222,#03223)
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region size, linear segment, linear offset, and number avail
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fields set
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Return: CF clear if successful
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EDDS number used field set
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if DX bit 6 set, lower 12 bits of BX = offset in first page
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CF set on error
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AL = error code (see #03218)
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">
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<h2>Int 4B/AX=8105h
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</h2>
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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>Virtual DMA Specification - SCATTER/GATHER LOCK REGION</font></h3>
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<PRE>
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AX = 8105h
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DX = flags <a href="rb-6265.htm#Table3224" tppabs="http://www.ctyme.com/intr/rb-6265.htm#Table3224">(see #03224)</a>
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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)
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region size, linear segment, linear offset, and number avail
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fields set<br>
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<p><b>Return:</b><br>CF clear if successful
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EDDS number used field set
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if DX bit 6 set, lower 12 bits of BX = offset in first page
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CF set on error
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AL = error code <a href="rb-6262.htm#Table3218" tppabs="http://www.ctyme.com/intr/rb-6262.htm#Table3218">(see #03218)</a>
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EDDS region size field filled with max length in bytes that can be
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locked and described in the EDDS table
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</PRE>
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<p><b>BUG:</b>
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Windows 3.0 in enhanced mode may return zero instead of the physical
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page address for pages which were originally not present
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<p><b>See Also:</b>
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<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>
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<PRE>
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<p>
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Bitfields for VDS flags:
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<a name=table3224></a>
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Bit(s) Description (Table 03224)
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0-5 reserved (zero)
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6 EDDS should be returned with page table entries
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7 only present pages should be locked (not-present pages receive entry
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of 0000h)
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8-15 reserved (zero)
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</PRE>
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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-4b-1.htm" tppabs="http://www.ctyme.com/intr/int-4B.htm">
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Int 4Bh</a>
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- <a href="alpha-v.htm" tppabs="http://www.ctyme.com/intr/alpha-v.htm">
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V</a>
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