The stick was a regular 8way for movement. The dial rotated to aim & then was pushed to fire. It's just that the dial was not free spinning. It was notched, like an old TV channel changer button with 8 channels. That's what made the game so much more god awful hard to play. Trying to change stations and pushing while bullets & grenades came flying at you! A rotary (Ikari type) would have made it so much more enjoyable & easier. But you had to start somewhere to get to Ikari. It was a lesson well learned by Taito.
Pessimist: Oh, this can't get any worse!
Optimist: Yes, it can!