I’ve found a good key combination to work in many games including Neo Geo.
Here’s the PiTFT mapping :
- (5) TAB : Insert coin for Neo Geo games
- (6) ENTER : Start
- (12) SPACE : Select
- (13) X : X
- (16) Y : Y
You’ll find my Adafruit-Retrogame version here : https://github.com/paulgreg/Adafruit-Retrogame/tree/2buttons