That's one of them, there is also Hyper SF2 and I think SFZ3 and others. It turns out the only difference in the rom data was interlacing so I'm not going to be spending money on the others (which are all much more expensive than the Marvel board I bought) but they are worth dumping if someone will loan them to me. The others can't be faked/created from existing dumps because there are too many variables that would have to be guessed so if we are to document them in mame they need to be dumped. Also I've found that some Marvel boards have their program data in a different config/position than the board I have so maybe there are some that don't interlace, I don't know. But basically they need to be loaned instead of bought, unless someone wants to donate a lot of money specifically for them. The volume changes appears to be handled by some register or maybe in a pal. If you are offering to loan out that Gigawing you can send me a PM.
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