Category: <b>disk I/O enhancements</b>
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<pre><b>INT 4B - Virtual DMA Specification - RELEASE DMA BUFFFER</b>

	AX = 8108h
	DX = flags
	    bit 0: reserved (zero)
	    bit 1: data should be copied out of buffer
	    bits 2-15 reserved (zero)
	ES:DI -&gt; DMA descriptor structure (see <a href=../../it/21/32.html>#03221</a>,<a href=../../it/22/32.html>#03222</a>) with buffer ID set
		  (also region size/region offset/segment if DX bit 1 set)
Return: CF clear if successful
	CF set on error
	    AL = error code (see <a href=../../it/18/32.html>#03218</a>)
BUG:	under Windows 3.0 Enhanced mode, you must specify that data be copied
	  for this function to work correctly
SeeAlso: AX=8107h
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