Im posting this for a friend.
I tried the Zaxxon. It seems to work, although the screen is pulling in the top left corner (needs re-capping?)
I didnt test the other two but he assures me they do work.
He said the speedway is mechanical, came out in the 60's before computers were implemented in the games.
Drop me a pm for connection information if interested.
Location is south Kentucky, USA about 60 miles north of Nashville, Tn.