saundby.com: Electronics

Switch on the soldering iron.

Mystery Z-80 SBC

Mystery Solved!

Thanks to the helpful folks at the Vintage Computer Forums this board has been identified as the main board of a Xerox 820 computer, a close relative of the Ferguson Big Board I.

(Images of board below. Click on images for more detailed view.)

I have some other projects already lined up, but once they're done I'll see if I can restore this board to its former glory. Current work lined up includes:

So, it'll probably be a year at soonest. Watch my electronics page for more on these projects.


I got these boards in a lot with quite a few others and didn't know what they are. One is populated, the other is bare. Click on the images below for larger, more detailed views. Thanks for looking!