http://www.onyxsoft.se/joydivision.html
Stefan Blixth contacted me recently with this good news :)
Hi Ce Ce, I'm the creator of the JoyDivision Joystick adapter and I noticed on your page here : https://gurce.net/c64mini/hardware_compatibility_lists that it's listed as non working on the mini. I have now fixed this with a new Firmware 😊 Just wanted to inform you about that so the list can be correct 😊 Stefan Blixt, OnyxSoft