> The problem is that a BIOS is not a game, but it's treated as one in MAME so that > sets can "inherit" from them as they would a parent set.
wrong.
most bios (pc10, neogeo, megatech...) can also be run by themselves to emulate a system turned on without a game inserted. as such, is absolutely correct to treat them as games
however, this has some drawbacks when it comes to this situation with artworks...
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