Here is the part where many articles get vague. Let us be direct.
The Sony PlayStation 2 BIOS is copyrighted software. Downloading SCPH10000.zip from a random ROM site is technically copyright infringement. Sony has historically issued DMCA takedowns against BIOS repositories.
Unlike modern PC games that handle graphics and sound through Windows or Linux drivers, the PlayStation 2 relied entirely on its proprietary BIOS. The BIOS is a low-level chip on the PS2 motherboard that contains:
When you run PCSX2 without a BIOS, you see a black screen. No menus. No sound. The emulator is a "shell" waiting for the proprietary instructions that Sony legally owns. SCPH10000.zip provides those instructions. Sony Playstation 2 Bios File Name Scph10000.zip
Why zip? The PS2 BIOS consists of multiple files (typically rom0, rom1, rom2, erom, mecard, etc.). When emulators like PCSX2 were first developed, users were instructed to dump their BIOS and compress the set into a single .zip file for easy management. Hence, SCPH10000.zip became the unofficial standard name for the Japanese launch BIOS pack.
Here is the part that every blog post must stress.
You cannot legally download scph10000.zip from a random website. Here is the part where many articles get vague
The BIOS is copyrighted software owned by Sony. Distributing it is piracy. Emulators themselves are legal; the BIOS is not.
The only legal way to acquire scph10000.zip is to dump it from your own physical PlayStation 2 console.
If you own a launch model Japanese PS2, you can use a USB drive and homebrew software (like “BIOS Dumper”) to extract the exact file from your motherboard. For 99% of users, this is impractical. As a result, most emulation users resort to downloading a "BIOS pack" from the internet. When you run PCSX2 without a BIOS, you see a black screen
Disclaimer: This blog post is for educational purposes. You should only emulate games and BIOS files you have legally purchased and dumped yourself.
The SCPH-10000 BIOS is notable because it belongs to the initial launch units. It is often used by preservationists or advanced users because it contains the "PlayStation Driver" (the menu seen when starting the console without a game) that allows you to browse memory cards and play PS1 games. However, because it was an early version, it had compatibility issues with some later PS2 games. For general emulation, users often prefer later BIOS versions (such as SCPH-77000 or SCPH-90000) for better stability.