For BIOS auto-detection, enable: Settings → Core → Allow cores to use system directory for BIOS
But getting Neo Geo ROMs working correctly in RetroArch is notoriously tricky. It’s not as simple as dragging and dropping a Super Mario World ROM. Due to the Neo Geo’s unique hardware architecture—specifically its memory mapping and the need for a BIOS file—newcomers often hit a wall of black screens and error messages. neo geo roms for retroarch
To get the best look for Neo Geo's high-quality 2D pixel art: For BIOS auto-detection, enable: Settings → Core →
A "legacy" core optimized for low-end hardware like the Raspberry Pi Zero, older mobile phones, or modded legacy consoles. For BIOS auto-detection