Too bad... Thanks for the efforts, man. I've been using your groovymame builds for a long time but I can't find the last one those two games worked fine. Could you posted it?
I don't understand why MAME doesn't focus on accuracy instead of just compatibility. The only emulator that can "run perfectly" Dark seal is fba, but for some reason the music is in a slower tempo, maybe the author underclock the driver to avoid the speeds up... in mame you can do that putting the sound cpu in a 23% underclock, but is a pain doing it everytime you run the game.