[Article 6341]Tempest PCB: a new board

I’m working on a Tempest PCB bought some months ago on ebay. It missed some PROMs and custom chips on the aux board.

I needed a little bit to find all missing parts and I tested the aux board using my working main so I’m sure it works.

So, plugging the boardset I can see this strange TEST screen:


all “0” are on the same line… They should be on 5¬†different lines…

Exiting fro the test the game resets.