I have a Bridgeboard card that was upgraded to a 486. This makes the card more usable. The biggest problem I had with it was getting enough memory to the PC side to run anything large. Its been a long time since I played with it but I believe the problems I had were all based on the limit to the amoutn of RAM you could have on the Zorro II bus.
I got it during my every major OS in one box phase.
