Ms Pac Man Part Question

saturnkk

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I recently bought a working Ms Pac Man. When I opened the back to clean-up the mysteries that lay inside I found the following board, completely detached and on the bottom?!?

It says pac man on it but I am not sure what it is for, as I mentioned the game is working...

Can anyone help me to understand where this goes (if anywhere) and if it is needed?


Thanks!!!
 

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Its a filter board, usually between the board and the wiring harness to clean up the signals. Not really needed and a lot of them get bad solder points which is why they prob pulled it out. I'd just stash it back in there and keep it with the game but its not needed.
 
Can anyone help me to understand where this goes (if anywhere) and if it is needed?

It's a filter board. It goes in the bottom of the cabinet, with the dust bunnies, gum wrappers and quarter slugs.

It's totally unnecessary for proper game operation. If you want to add another set of bad contacts to the wiring, and introduce a certain, unreliable flakeyness to the game, then connect it between the game board and the wiring harness.

-Ian
 
It's a filter board. It goes in the bottom of the cabinet, with the dust bunnies, gum wrappers and quarter slugs.

It's totally unnecessary for proper game operation. If you want to add another set of bad contacts to the wiring, and introduce a certain, unreliable flakeyness to the game, then connect it between the game board and the wiring harness.

-Ian

Well, who wouldn't want to do that?!?

;-)

Thanks guys!

On a somewhat related topic, how does the speed-up chip work? Are they expensive? Difficult to get working? Will it allow me to easily switch back and forth from regular speed to fast?


Thanks again!
 
The "usual" speed-up chip is just a single replacement EPROM. It's not expensive, and if you have access to an EPROM programmer (or a friend with one), you can program your own. You can also burn both chunks of code (original and fast) into one single, larger ROM, do a little wiring, and have a toggle switch on the upper address line, toggling which half of the code is active at a givin time - switching between slow and fast.

-Ian
 
The "usual" speed-up chip is just a single replacement EPROM. It's not expensive, and if you have access to an EPROM programmer (or a friend with one), you can program your own. You can also burn both chunks of code (original and fast) into one single, larger ROM, do a little wiring, and have a toggle switch on the upper address line, toggling which half of the code is active at a givin time - switching between slow and fast.

-Ian

Cool. Well in my case... how much would a dual ROM cost and does it have instructions on how to connect it?
 
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