I have an old MAS Systems mod that was done around 1994-5 that is basically two bios chips on top of one another with a switch to go choose between them. One of them is the standard AES bios and I believe the other is the US MVS bios. Anyone have any more info on this? It is the mod that was advertised by Chad Okuda as the way to get blood in Samurai Showdown 1. Thanks.
Old Debug Bios Mod
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