I recently purchased about 20 old 80386 systems to recycle for kids in the area to learn on. They came without hard drives so I purchased a few very low capacity drives to put in them. The first couple went fine, no problems. But some are giving me HDD controller failure errors. I know the drives are good, tested them on other computers. They are jumpered correctly, and set in the bios right. So i went to the controller card, I unplugged all other devices from the card one by one--nothing. So I'm guessing the card is not jumpered correctly. My problem is I can't find the manu. of it anywhere!! Installed on the card is a printer and serial port, pins for game, com2, fd, and hd. 7 jumpers on top left corner. A couple of the chips have names--Twinhead and Zilog-- and the card itself says Magic AT I/O Plus. No FCC-ID anywhere. IF anyone has any idea who could tell me the jumper settings on this card it would be greatly appreciated.