Sony Computer Entertainment
Hidden Firmware Info
Like the PlayStation Portable, you can go to Settings, System Settings, and System Information and press and hold L1 + R1 + Left + Square then release them and immediately press and hold Start.
Upload some images, maybe a video showing it in action?
Early PlayStation 3 consoles had the option to install other operating systems, such as Linux or FreeBSD. This feature was removed in later models and older models running firmware v3.21.