Category: <b>DOS extenders</b>
<br>Flags: available only in protected mode<p>
<pre><b>INT 31 - DPMI 0.9+ - UNLOCK LINEAR REGION</b>

	AX = 0601h
	BX:CX = starting linear address
	SI:DI = size of region in bytes
Return: CF clear if successful
	CF set on error
	    none of the memory is unlocked
	    AX = error code (DPMI 1.0+) (8002h,8025h) (see <a href=../../it/43/31.html>#03143</a>)
Notes:	pages at beginning and end will be unlocked if the region overlaps them
	memory whose lock count has not reached zero remains locked
SeeAlso: AX=0005h,AX=0600h,INT 21/AX=251Bh,INT 21/AX=EB07h
</pre>