Hi Everyone.  I have no idea what these things are called.  They show up on
ebay all the time and look like entire 486 machines on a full-length 16-bit
isa card.  I'm assuming these are designed to be plugged into a passive back
plane.
I've always wanted to tinker with a computer of this design, but I haven't
had any exposure to them.  Is there anything I should look for or avoid
before trying to buy one of these boards?  Thanks.
brian