The file "Scph-90001-bios-v18-usa-230.rom0" is the primary system firmware (BIOS) image for the PlayStation 2 Slim (SCPH-90001) Go to product viewer dialog for this item. model, specifically for the North American (USA) region. Technical Specifications Version: 2.30 (v18). Console Model: SCPH-90001 Go to product viewer dialog for this item.
The file string you provided, SCPH-90001-BIOS-V18-USA-230.ROM0 Scph-90001-bios-v18-usa-230.rom0
The official and legal way to obtain this file is to use a Homebrew-enabled PS2 and a tool like BIOS Dumper. You can find detailed guides on this process at: The file "Scph-90001-bios-v18-usa-230
deadweight: Clean dump. SCPH-90001, BIOS v18, NA region. Custom bridge method, full sector-by-sector verification. First known clean extraction. Hashes below. Someone else verify before I mirrors it. NA region. Custom bridge method