Add a basic button/analog test screen which displays all the raw button and analog inputs, preferably with a little visualiser for the stick. [ctest_360](https://github.com/Ryzee119/n360/tree/master/n360_rom) is a good baseline in that regard: 
Add a basic button/analog test screen which displays all the raw button and analog inputs, preferably with a little visualiser for the stick.
ctest_360 is a good baseline in that regard: