Ms. Pac-Man speed-up chip - which one?

coinopper

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I have 2 Ms. Pac boards here, one original and one with the Two-Bit Score daughter board. Both have the speed-up chip on them. I'd like to change them back to normal speed. Can someone tell me which chips I have to change?
 
You cant slow down the ABC board without someone hacking the code. The program is all on one rom that resides on the daughterboard.
 
.. or emailing Two-Bit Score and having them send you the correct ROM version to program a new 27C512 EPROM with, which is what I ended up doing :)
 
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