Stern 24.. Game resets in 2,3,4 player mode after player 1 loses first ball

[Alpha1]

So the problem is that the game reboots if I start a multiplayer game as soon as player 1 loses their first ball.

I've updated the game code to the latest, reseated connectors, I am thinking this is possible a ram issue?

Does anyone know the ram used for the CPU and where I can get some from?

 

[stoptap]

Wow. I've never heard of a game only having a fault in multi player games.
Does it play okay in a single player game ?

 

[Alpha1]

Yeah it plays fine.

 

[stoptap]

Do you have another ribbon cable you can swap that links the two boards ?

 

[Jay Walker]

Wow. I've never heard of a game only having a fault in multi player games.
Does it play okay in a single player game ?

The two 1981 Stern 'FreeFall' games bought by a local arcade could only really be played in single player mode - anyone who started a two-player game risked having Player 1, Ball 1 suddenly change to Player 2, Ball 1, scoring of a token 20,000 or so, then a change to Player 1, Ball 2. I don't recall any occasion of 3 or 4 player games even being attempted. Both the machines were sent back.

 

[Alpha1]

I've reseated all the cables - it's a ram issue If anyone knows a source or can give me a link to the actual chip locations on the CPU i'll get the swapped.

Thanks

 

[chris b]

swaping the ram on a sam cpu will be a tricky job

 

[Alpha1]

I've got someone that can do surface mount stuff so not an issue.

just wondered where to order the bladdy ram chips.