This card is sitting in a IBM RT PC. http://i.imgur.com/Adqnxr3.jpg?1
What kind of card is it? The WD1935 seems to be a SDLC chip. I cannot find any reference to the numbers P/N 6247874 (bottom layer etch) or the number on the sticker on the backside: 6247871G001 It is connected to an IBM marked dongle which has 4 BNC connectors. Is it a 3278-3279 emulation board? /Mattis
