INT 31 P - DPMIsee DOS Protected-Mode Interface 1.0+ - MAP DEVICE IN MEMORY BLOCK
	AX = 0508h
	ESI = memory block handle
	EBX = page-aligned offset within memory block of page(s) to be mapped
	ECX = number of pages to map
	EDX = page-aligned physical address of device
Return: CF clear if successful
	CF set on error
	    AX = error code (8001h,8003h,8023h,8025h) (see #03143)
Notes:	only supported by 32-bit DPMIsee DOS Protected-Mode Interface hosts, but may be used by 16-bit clients
	support of this function is optional; hosts are also allowed to support
	  the function for some devices but not others
SeeAlso: AX=0504h,AX=0509h,AX=0800h,AX=0801h