> Gotcha, I just thought someone might know. So it is basically code that doesn't > exactly match in a small manner. I didn't know from other system ROM dumps if there > was a probable reasons for this, maybe bugfixes or changing difficulty? > > Thanks...
It could be one of many (or more) reasons: bugfixes, typo fixes, different release dates, updated copyright information, graphic fixing, audio fixing, addition or removal of features, dip switch info...
Nobody knows. And not many people outside of arcade operators, collectors, and people from The Cutting Room Floor who are looking for the differences will know.
Though sometimes the changes are documented, that is rarely the case.
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