INT 2F UC - Diamond Stealth64 Video - DMSSTL.DRV - ???                          
	AX = 4027h
	???
Return: ???
Notes:	called when ???
	a protected-mode handler for this function may be installed with the
	  function RFV_HOOKINT2FHANDLER
SeeAlso: AX=4021h,AX=4022h