> The problem is Nebula (AFAIK) uses the MAME FM cores*, which even to this day we > haven't got Jarek to agree to relicense for commercial use (it's one of the biggest > sticking blocks in our relicesning efforts as they're used by over half the drivers > in MAME) so unless ElSemi specifically rewrote them for this then it simply can't be > legal. There's other MAME code in Nebula too, so it's really not as clear cut as they > make out.
Nebula definitely uses the MAME FM cores and some other MAME bits I don't recall. So it probably wasn't legal for GameTap to use it and it's likely not for DotEmu either, unless they replaced all of it.