"The IBM PowerPC® 970FX Evaluation Kit software includes the IBM PowerPC Initialization Boot Software (PIBS) resident in the flash memory on the board, PIBS source code, the IBM Embedded PowerPC Operating System (EPOS), sample application programs, and application development libraries and tools. Documentation includes board and software technical specifications, evaluation board schematics, and an application note that describes step-by-step instructions on how to obtain and build GNU software development tools for use with the evaluation kit software. Also included is software for the PowerPC 405EP service processor on the board that manages power, initialization, clocks, configuration, and other system tasks. The service processor software also utilizes PIBS and EPOS."http://www-128.ibm.com/developerworks/power/pa-slof/?S_TACT=105AGX16&S_CMP=HP
The SLOF source code provides a largely machine-independent BIOS and illustrates what's needed to initialize and boot Linux™, a hypervisor, or any other operating system or virtualization layer on PowerPC-based machines based on the de-facto industry Open Firmware boot standard. This download is made available under a liberal Open Source Software (OSS) license."