[net.micro.pc] PC AT and old serial cards

johnl@godot.UUCP (10/12/84)

I tried putting an old serial card (the kind with a real DB25, that everybody
seems to have closets full of) into my PC-AT, and like IBM said, it didn't
work.  But then a friend at IBM told me to pull of the undocumented jumper
J1 in the middle of the serial card, and now it works fine on an AT.  Hmmn.
Sure was easier than soldering together a new serial cable.

John Levine, ima!johnl