I have a retro-bit Sega bluetooth controller and it took me a while to figure out how to pair and configure it correctly. I'm still having an issue with handoff from Emulation Station to Retroarch but it's playable. Anyway, I pair the controller using home+X. Then configure the buttons as follows in emulationstation: Controller == Emulation station B = A A = B Y = X X = Y Z = LB (ensure this configures as Axis 2+ not 2-) C = RB (ensure this configures as Axis5+ not 5-) LB = L2 RB = R2 Start = Start Select = Select Home = hotkey This configuration in emulationstation matches the normal buttons for StreetFighter2 on sega without any customizing the controller config in the emulator. To ensure Z and C configure as Axis 2+ and 5+ i have to hold them longer than usual or they detect as 2- and 5-. Sometimes have to redo C and Z multiple times to get it to detect as +. edit: this button config works but the problem I have is that after emulationstation goes black to enter the emulator, nothing happens until I turn off the controller (by holding the home button) and then turning it back on (by holding the home button). Then the game will play fine.

so i hadn't used my recalbox pi setup since 2018 and it was a version of recalbox from 2016/17.. so i had just reloaded it with recalbox 7.0 yesterday.. so i found it uses mame 2013 plus and a newer version of retroarch from what i was used to.. also i couldn't get the normal mame 2013 mame menu to pop up using keyboard tab key.. this link below explains what settings to set in retroarch that's in recalbox 7.0 so that you can just use the keyboard for mame menu https://retropie.org.uk/forum/topic/24829/mame2003-plus-how-to-enable-menu

@olivierdroid92 Merci pour ta réponse !! Il y avait autrefois un tableau Excel dans le wiki " l'arcade facile " qui renseignait sur la compatibilité des roms du fullset Mame 0.78 vu que certaines ne sont pas fonctionnelles. Visiblement le lien vers ce tableau n'existe plus.. y'en a t'il un autre ? Car c'était vraiment pratique...

@Zaphod Thanks for the link but it looks like the files need to be uncompressed first. The batch file will help as far as automating the process once everything is uncompressed. I think I’ll transfer everything to my 2tb nvme drive first to make this going even faster.