modded ms pac pcb

You should be able to go back if you have an original ROM set and the daughter PCB. Any mods done to enable the extra sockets required for the mod should not affect the rest of the PCB. I have done one particular speed up hack (eliminating the daughter PCB) that used two extra sockets (and ROMs). It required a few extra wires but nothing was done to any of the sockets used by the original ROMs.
 
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