The SCPH-90006 BIOS is a Japanese PlayStation (PS1) console firmware revision that collectors and modders often encounter. This post summarizes what changed in this BIOS release, why it matters for hardware enthusiasts and preservationists, and practical tips for working with it.
| Revision | MD5 Hash (example) | Characteristics |
| :--- | :--- | :--- |
| Early 90006 | 81d60e6e... | Works with TonyHax, old PSnee |
| "New" 90006 | f3a2e1c8... (varies) | Blocks certain cheat devices, needs TonyHax International | scph90006+bios+new
often prevents standard "Free McBoot" (FMCB) memory cards from auto-booting, requiring alternative homebrew methods like FreeDVDBoot ConsoleMods Wiki 1. Identifying Your Hardware Before starting, confirm your unit is a true SCPH-90006 to ensure the correct software compatibility. Model Label : Look for " SCPH-90006 " on the back or bottom sticker : Check for a small code like SCPH-90006 BIOS — What's New and Why It
The modern way. Use pico-ps1-bios-dumper: | Works with TonyHax, old PSnee | |
Region Free + I/O Map: The new BIOS would strip out regional locking and disable the “stealth” anti-modchip checks Sony added to late 9000x units (the ones that caused random reboots). A new I/O handler would allow for higher-capacity memory card emulation (think 512 MB virtual cards).
Topic: The SCPH-90006 BIOS and the Later PS2 Models