> That's because roms for those systems need to be headered, footered,
> interleaved, or because the relative Goodtool doesn't allow the calculation?

Well....good question. There are some systems which store important banking information (and other stuff) in the headers.
The goodtools database export which I use for the rest of the dats always exports the raw data crc32 only. I'm not that interested in console roms and I really don't know if the mentioned sets could be headerless or not.

Roman Scherzer
ClrMamePro