> Wait are you guys saying this is actually a hidden mode already in standard Naomi > roms? (rather than a special rom that Sega only gave out to Naomi developers?)
For Naomi, this is a developer-only thing. Bart is saying some Model 3 games as shipped may contain a similar debug mode, but they haven't confirmed that (it's possible that the text is present but the code/data isn't) or figured out how to enable it.