INT 21 - Phar Lap 386/DOS-Extender VMM - UNLOCK PAGES
AX = 251Bh
EDX = number of pages to unlock
if BL = 00h
ECX = linear address of first page to unlock
if BL = 01h
ES:ECX -> pointer to first page to unlock
Return: CF clear if successful
CF set on error
EAX = error code
09h invalid address range
SeeAlso: AX=EB07h,INT 31/AX=0601h

See also: 21251A

21251B - Phar Lap 386/DOS-Extender VMM - UNLOCK PAGES