Sunstation Pad
From Videogame Interface Wiki
Sunsoft's Sunstation Pad is a very pretty controller for the PlayStation. The D-pad is yuck, but the layout is cool and the colours are nice, plus it had rapid-fire, slow-motion, and programmable macro features.
There is also a Saturn version called the Sunsaturn Pad.
Seen multiple people having problems with them on PS2.
Instructions
Can't find an image of the instruction sheet, so these screenshots from Classic Game Rooms video will have to do.
See Also
- https://consolevariations.com/collectibles/sunsoft-sunstation-programmable-controller-pad
- Controller Pros Welcome: Sunsoft Sunstation troubleshooting - Shmups forum post, has teardown photos.