If you have multiple rails on the secondary side shorted to ground, you'll need to start pulling parts off the power rail until the short goes away....
The whole microcontroller argument doesn't bother me. Not sure how one "black chip with silver legs" is any different from any other "black chip with...
Just googled up RC2014, and looking at the structure of the bus... When you say "z380 with simple hardware compatibility", do you mean a single card...
I'm looking for a missing keycap to complete the keyboard on my Vector Graphics 3 VIP system. It uses the same switch style as a Northstar Advantage...
Anent the barrel battery: If you're going to replace it with some external primary cells (e.g. AA batteries) connected to a header intended for that...