Some articles on joypad, joypads:

Atari ST - Technical Specifications - STE
... be used without having to make any modifications to computer's hardware Analogue joypad ports (2), with support for devices such as paddles and light pens in addition to joysticks/joypa ... The Atari Jaguar joypads and Power Pad joypads (gray version of Jaguar joypads marketed for the STE and Falcon) can be used without an adapter ...