INT 2F - IOMEGA DRIVERS - INSTALLATION CHECK

	AX = 5700h
	BX = program ID??? (0201h used by GUEST.EXE)
	DX = 496Fh ('Io')
Return: AL = status
	    00h not installed
	    FFh installed
SeeAlso: AX=5701h,AX=5710h,AX=5711h,AX=5712h