On ARM devices (like the Raspberry Pi or Anbernic handhelds), the PCSX-ReARMed core runs more efficiently with the SCPH-90001 BIOS. The v18 binary is smaller in some dynamic recompiler operations because it contains fewer legacy hardware fallbacks. Users report frame rate improvements of 3-5% in demanding 3D games when switching from a 5501 BIOS to the 90001 v18.
Be extremely cautious when searching for these files online. Sites offering BIOS downloads are often unofficial and may bundle files with malware or unwanted software. How to use it with PCSX2: Place the file in the folder of your PCSX2 directory. Open PCSX2 and go to Settings > BIOS Select the USA v02.30 (2008) entry from the list to set it as your active firmware. dumping the BIOS from your own console? Scph-90001-bios-v18-usa-230.rom0
If you have the original hardware, dump your BIOS. Contribute to the No-Intro DAT set. Emulate with integrity. But if you simply download it from a shady ROM site, you're holding a ghost—one that Sony’s legal team still actively defends. On ARM devices (like the Raspberry Pi or