INT 31 P - CauseWay - "UnLockMem" - UNLOCK REGION OF MEMORY AX = FF1Dh BX:CX = starting linear address SI:DI = 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=FF1Bh,AX=FF1Eh