It has to have either a battery or an NV ram if its saving scores. Additionally it would have to have the roms upgraded to high score save since the VS boards never saved high scores.
thats what i thought but the hi scores wont reset top score 21100 to 12000 i even put in another set of rom wich both sets have attract mode did the original roms have an attract mode,i even swapped the cpus just wont reset