I cannot identify this card, it doesn't even look like a typical computer card, because it has very few pads on edge connector. It uses only 1 data, 10 address, AEN, clock and /IOW signals, it also supposed to have 2 DB9 connectors. ICs on card tell very little about its possible functions, it got 4x NEC 41264C dual ports graphics buffers (according to datasheet) a Toshiba TC17G series CMOS gate array chip (FPGA equivalent) and 32KB UV EPROM, which contains no ASCII simbols, just some random HEX values:

"DB DB 9B 9B 9B 9B 9B 9B 9B 9B 9B 9B 9B DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB CA EA DA 9A 9A 9B FF FF FF DB DB 9B 9B 9B 9B 9B 9B 9B 9B 9B 9B 9B DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB DB FB DA FA DA 9A 9A 9B FF FF FF"

Googled texts on card, but found nothing. What could it possibly be?