The best part about this project is all the product testing, even when it's not really needed. Hard to put down the joystick with great titles like Project X SE (CD32) and Pinball Fantasies (CD32).
Here are some low quality photos of the A1200 while testing CD32 joypad support (it's not easy to take good photos of a real CRT):
Here is a screenshot of Psygore's JoyPortTest
The "joypad" part there means JoyPortTest
detected a CD32 controller (well, Wild Port in this case). This tool was a great help when reversing the CD32 protocol, that and the logic analyzer.