Int 31 Fn 0005  P - Dpmi 0.9+ - Unlock Selector                            [E]

   AX = 0005h
   BX = selector to unlock (permit paging)

Return: ???

Note:  although marked as reserved in versions 0.9 and 1.0 of the DPMI
     specification, this function is called by MS Windows TASKMAN,
     PROGMAN, and KERNEL

See Also: AX=0004h,AX=0601h