Help ID this board...

Hey, I was wondering if someone could help me ID this card. I found this board in an old Macintosh IIx at a swap meet... When I opened up the case I saw this big (about 12 inches long and 4 inches wide) BLUE board plugged into one of the NuBus slots. It has two large chips on it with the markings Xilinx XC2018-70 PC84C. There is only one port on the card that looks like a 9 pin VGA or serial port. It has a hand written serial number (1570156), and a part number of 10008 Rev#2. There is only one sticker on the card that says "1990 LTI; All Rights Reserved; Ver DPDII 52290H" Does anyone have a clue? Since the board is blue, I figured that its probably a prototype of something, maybe a video card?? Thanks in advance... --Rob