> A few posts back it sounded like ALL the source files would be MAME+BSD,
MAME+BSD is pointless, you can do anything with BSD & having it licensed MAME as well wouldn't achieve anything. The push was to get all source files BSD, but that didn't work out so well for those involved.
> to get confused. Keeping the files that go way back as MAME license only and making > newer files where authors and contributors can be identified MAME+BSD sounds > perfectly fine legally!
A lot of developers don't want their source to be licensed as BSD, there are plenty of BSD projects that have realised their mistake. There are plenty of write ups.