Very simple one with not much effort. Turbo Grafx and PC Engine are both the same controller design. To tell the console we have 6 buttons all direction are pressed. It does not appear the game tells us what controller to expect so you would need to enter 6 button mode manually. The current idea is if the user pressed any button other then the two main buttons, it enter this mode. How this is done is still undecided but will be well tested.