INT 31 P - DPMIsee DOS Protected-Mode Interface 1.0+ - MODIFY PAGE ATTRIBUTES
	AX = 0507h
	ESI = memory block handle
	EBX = offset in memory block of first page
	ECX = number of pages
	ES:EDX -> array of WORDs with new page attributes (see #03156)
Return: CF clear if successful
	CF set on error
	    AX = error code (8001h,8002h,8013h,8014h,8021h,8023h,8025h)
		(see #03143)
	    ECX = number of pages which have been set
Notes:	only supported by 32-bit DPMIsee DOS Protected-Mode Interface hosts, but may be used by 16-bit clients
	if EBX is not page-aligned, it will be rounded down
SeeAlso: AX=0504h,AX=0506h,INT 21/AX=251Eh