UPDATE :

instead of using mame4all pi I tried imame4all and I could play with 4 players but this emulator is so laggy it was unplayable. So if it gives anyone an idea please help me !

Also it’s odd in the emulator carousel there is ES_config and I can’t run anything in there. Not even the basic input or the retroarch gui. it says permission denied but I did a chown on this folder and when I check in winscp it says owner : pi. It’s reallt strange.

Thanks very much, once again !

Sorry wrong thread, I apologize