INT 67 - EEMS - PAGE MAPPING                                                    
	AH = 6Ah
	AL = subfunction
	    00h save partial page map
		CH = first page frame
		CL = number of frames
		ES:DI -> buffer which is to be filled
	    01h restore partial page map
		CH = first page frame
		CL = number of frames
		DI:SI -> previously saved page map
	    02h save and restore partial page map
		CH = first page frame
		CL = number of frames
		ES:DI = buffer for current page map
		DI:SI = new page map
	    03h get size of save array
		CH = first page frame
		CL = number of frames
		Return: AL = size of array in bytes
	    04h switch to standard map register setting
	    05h switch to alternate map register setting
	    06h deallocate pages mapped to frames in conventional memory
		CH = first page frame
		CL = number of frames
Return: AH = status (see #03648)
Note:	similar to EMSsee Expanded Memory Specification function 4Eh, except that a subrange of pages can be
	  specified
SeeAlso: AH=69h