INT 2F U - Quarterdeck QDPMI.SYS v1.0 - INSTALLATION CHECK                      
	AX = DE01h
	BX = 4450h ("DP")
	CX = 4D49h ("MI")
	DX = 3039h ("09")
Return: AL = FFh if installed
	    BX = 4D42h ("MB")
	    CX = 4921h ("I!")
	    DX = 8F4Fh
	    ES:DI -> filename of DPMIsee DOS Protected-Mode Interface host overlay
InstallCheck:	test for the existence of the character device QDPMI$$$
SeeAlso: INT 2F/AX=1687h,INT 31/AX=0000h
Index:	installation check;QDPMI