Anyone know what this is? It came from a 256K IBM XT, I thought at first it was a video card, (it was in the first slot), but it's got eight banks of nine 41256 ram DIPs on it. That sounds like a lot for a mono video card, doesn't it? Combo card? it's got a looong double-row of pin sockets along the bottom just above the ISA connector, and another single row up the whole edge between the external connectors (male 9 pin & female 25 pin) and the components. Maybe a daughter board? It's got one 6-position DIP switch at the top right (^vvvv^) and 3 three-pin jumpers along the top near the rams, (xx. xx. xx.) It's got a couple've big (1/8") holes on the board, lending credence to the daughterboard theory. All the chips are labeled in an intersting way-- u84 158 is --get this-- a 74LS158N. Don't ya wish everything was made like this?