Okay this is the last of my Sega Naomi stuff, everything else has gone, I got 2 Mainboards, both working 100% choice of either JAP BIOS, USA 'G' or USA 'D' Bioses $50 each shipped or take the pair for $80 shipped
yeah 'D" came with MvC2 boards and I dont think you can run GD ROM games using 'D" needs later bios, JAP obviously allows titles that normally would not play and sometimes offers different features etc so basically 'G' is the best for US games and GD ROM support, but always handy to have a JAP bios for those overseas games