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31FF20

Category: DOS extenders
Flags: available only in protected mode

INT 31 - CauseWay - "UnLockMemNear" - UNLOCK APP-RELATIVE MEMORY REGION

	AX = FF20h
	ESI = starting application-relative linear address
	ECX = size of region in bytes
Return: CF clear if successful
	CF set on error
Desc:	allow memory to be swapped out by the virtual memory manager
Note:	locks are applied on 4K page boundaries, so memory above and below
	  the specified region may be unlocked as well
SeeAlso: AX=FF1Eh,AX=FF1Fh

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