huh, funny. before digging into this bios file, I never noticed that the saturn bootup jingle is saved as a raw AIFF file in the bios (which is then processed by the DSP, turning the mono effect to stereo and aliasing the higher frequencies - the aiff is 37800hz on the jap and 29000hz on the usa bios).
I wonder how that eeprom dump came to be, since the bios is dated later then the original 1.00 japanese bios, but earlier then the 1.01 japanese bios (or any of the overseas ones for that matter).

At any rate, it does not boot past the splash screen. Are you sure the dump for the bios is good?