In 2013 I made a little N64 controller tester I did adapt it for the card reader shield some time ago but it seems I never posted it here.
https://github.com/sanni/cartreader/tree/master/extras/controllertest
In 2013 I made a little N64 controller tester I did adapt it for the card reader shield some time ago but it seems I never posted it here.
https://github.com/sanni/cartreader/tree/master/extras/controllertest