The FinalBurn Neo and FBA cores require a neogeo.zip containing the following files:
On a modded PS Vita, the default directory for BIOS files is: ux0:/data/retroarch/system/
The recommended BIOS for PCSX ReARMed on Vita is scph5501.bin (US region) or scph1001.bin . Files must be named exactly as expected and placed in RetroArch’s system directory.
Files should be placed this folder as unzipped, standalone files unless a specific subfolder is required by a core (e.g., system/dc/ for Dreamcast). You can verify your specific system directory by navigating to Settings -> Directory -> System/BIOS within the RetroArch menu. Required BIOS Files by System