Int 31/AX=FF1Eh

AX = FF1Eh
ESI = starting 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

See Also: AX=FF1Ch - AX=FF1Dh - AX=FF20h