INT 67 - LIM EMSsee Expanded Memory Specification 4.0 - GET/SET PARTIAL PAGE MAP
	AH = 4Fh
	AL = subfunction
	    00h get partial page map
	       DS:SI -> structure containing list of segments whose mapping
			contexts are to be saved
	       ES:DI -> array to receive page map
	    01h set partial page map
	       DS:SI -> structure containing saved partial page map
	    02h get size of partial page map
	       BX = number of mappable segments in the partial map to be saved
Return: AH = status (00h,80h,81h,84h,8Bh,8Fh,A3h) (see also AH=40h)
	    8Bh one of the specified segments is not mappable
	    A3h contents of partial page map corrupted or count of mappable
		segments exceeds total number of mappable segments in system
	AL = size of partial page map for subfunction 02h
SeeAlso: AH=4Eh