X's & O's
Bally, 1983Using the switch test I found that the outside two switches (left and right) for the drop targets register as the same switch. The same with another set of 3 individual target (top and bottom) switches (for the tic tac toe portion, left hand side of the playingfield) where the outside two switches also registers as the same switch but with difference numbers than the drop targets.
MPU is a new board from barakandl at https://nvram.weebly.com/
I will try to find a scan of the playfeild switch circuitry.
You can also use the Tech Chart I made.
It wouldn't as complete as the original schematics, but it will give you a quick view.
http://www.pinballrebel.com/pinball/cards/Tech_Charts/Bally_X's_and_O's_Tech_Chart.pdf
I could need some image of the back box cards (with the M-469 numbers on it in the lower right corner).
Peter
http://www.inkochnito.nl
Quoted from Inkochnito:You can also use the Tech Chart I made.
It wouldn't as complete as the original schematics, but it will give you a quick view.
http://www.pinballrebel.com/pinball/cards/Tech_Charts/Bally_X's_and_O's_Tech_Chart.pdf
I could need some image of the back box cards (with the M-469 numbers on it in the lower right corner).
Peter
http://www.inkochnito.nl
My back box cards start with M-051 or M051. If you want PM me and I will take pictures of them.
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Paradise, NV
Piershil