INT 2F - EXTENDED MEMORY SPECIFICATION (XMSsee Extended Memory Specification) v2+ - INSTALLATION CHECK
	AX = 4300h
Return: AL = 80h XMSsee Extended Memory Specification driver installed
	AL <> 80h no driver
Notes:	XMSsee Extended Memory Specification gives access to extended memory and noncontiguous/nonEMS memory
	  above 640K
	this installation check DOES NOT follow the format used by other
	  software
SeeAlso: AX=4310h,AX=1687h,INT 67/AH=40h,@xxxxh:xxxxh"PMM"
Index:	installation check;XMSsee Extended Memory Specification version 2+