INT 15 - Rational Systems DOS/16M - ???                                         
	AX = BF01h
	???
Return: ???
Notes:	under DESQview/X 1.02 DVDOS4GX.DVR, this call is identical to AX=BF02h
	called by DOS/4GW
SeeAlso: AX=BF00h,AX=BF02h