Arcade Buttons - How Many? Layout? - RetroPie Forum
How To: Build a RetroPie ARCADE Joystick + Control Panel - Play those classic RETRO GAMES! - YouTube
Arcade Buttons - How Many? Layout? - RetroPie Forum
Guide: Setting Up a RetroPie controls using IPAC2 Controller - Extensive Tutorial + Preconfigured files - RetroPie Forum
How to configure MAME controls correctly? - Picade - Pimoroni Buccaneers
GitHub - alexjohnmartin/RetroPieArcadeCabinet: Instructions and plans to build your own mini arcade cabinet powered by a Raspberry Pi, running RetroPie for emulation
Guide to adding your own games on Retropie on the Picade Arcade console - Electronic and software projects from Penguintutor.com
Guide: Setting Up a RetroPie controls using IPAC2 Controller - Extensive Tutorial + Preconfigured files - RetroPie Forum