Category: <b>disk I/O enhancements</b>
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<pre><b>INT 4B - Virtual DMA Specification - SCATTER/GATHER LOCK REGION</b>

	AX = 8105h
	DX = flags (see <a href=../../it/24/32.html>#03224</a>)
	ES:DI -&gt; Extended DMA descriptor structure (see <a href=../../it/22/32.html>#03222</a>,<a href=../../it/23/32.html>#03223</a>)
		  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 <a href=../../it/18/32.html>#03218</a>)
	    EDDS region size field filled with max length in bytes that can be
		  locked and described in the EDDS table
BUG:	Windows 3.0 in enhanced mode may return zero instead of the physical
	  page address for pages which were originally not present
SeeAlso: AX=8103h,AX=8106h

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