Technical data

Initialization Process
4 PowerPC Open Firmware Quick Start Guide
Initialization Process
The MPU, hardware, and Þrmware initialization process is
performed by the PowerPC Open Firmware power-up or system
reset. The Þrmware initializes the devices on the computer
motherboard in preparation for booting your operating system.
The Þrmware is shipped from the factory with an appropriate
set of defaults. In most cases there isnÕt a need to modify the
conÞgurations in the Þrmware prior to booting your operating
system.
This ßowchart shows the basic initialization process which
occurs during PowerPC system startup.
Figure 1. PowerPC Open Firmware System Startup
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STARTUP
RUN SELFTESTS
SYSTEM
INITIALIZATION
CONSOLE
DETECTION
AUTOBOOT
OPERATING
SYSTEM OR
CLIENT
INTERFACE