I noticed these Bios, but I don't know what effect they have on the games, much less what they are for or do?
In the Bios section of MAME32PLUS .79, you have the choice of selecting what 3 Bios you want to use.
Some are USA BIOS, JAPAN BIOS, EUROPE BIOS, ETC. ALL UNDER ST-V BIOS.
Then there's...