Gottlieb 80b - Factory reset / RAM clear?

[lukewells]

So it seems that Gottlieb 80b games don't initialise the RAM, they just keep whatever junk is already in there.

Is there a way to zero out all the values in game, or is there a test ROM or anything that can clear the RAM, as when I go into audits and press the start button to clear them, the original value is some junk characters, and when I clear the value it changes to 888.

I had this before when I first put batteries in the game, and can't remember what I did to clear it.

If there isn't a way to do it, I will have to dig out the Fluke 9010a and write a program to do it.

Thanks

Luke

 

[Paul]

@Poibug

 

[Poibug]

only thing i recall is zeroing data seen whilst looking thrubvisible scores etc

 

[Moonraker]

On the later System 3 games having crap or having "??" in the scores is an indicator that the RAM is bad even if it tests ok....