yeah, forgot to mention about Namco's games like this one or Gunsurvivor/Resident Evil, almost all of them is a bit custom Namco's Naomi, and need to press JVS_TEST to get into game test-mode.
Gunsurvivor also have interesting feature (or forgotten code from home version ?) - you can use Dreamcast controller plugged into port B to play the game.
> only problem with that game is you can get a highscore (which is great but the high
> score ranking board has all missing text so you cant see your own highscores
works fine here, uncheck "Disable AutoSort" in config-video if it checked