Openboot Prom; Openboot Prom Overview - Sun Microsystems Blade 1500 Service, Diagnostics, And Troubleshooting Manual

TABLE 5-3
TABLE 5-3
POST Diagnostic Level
min
max
TABLE 5-4
TABLE 5-4
POST Output Verbosity
min
normal
max
5.5

OpenBoot PROM

5.5.1

OpenBoot PROM Overview

OpenBoot PROM is the core software installed on the Sun Blade 1500 motherboard.
This software enables the CPU, memory, I/O bridge, I/O subsystem, and other
motherboard components to perform minimal communication to initially boot the
Sun Blade 1500 workstation to a state where it can further load an operating system
from either an installed hard drive, an optical drive, the network, or from some
external boot device. Because this software is permanent to the motherboard
hardware, it is called firmware.
As seen in
role in starting the Sun Blade 1500 workstation. If an error occurs during that
process, a message is likely to be displayed. The error might happen while the
OpenBoot PROM loads the Solaris operating system. Refer to
on page 7-1
describes the diagnostic levels.
POST Diagnostic Levels
Output
Testing of CPU, cache, some memory, and I/O bridge chip.
Same tests as min, with additional extensive memory testing.
describes the output verbosity.
POST Output Verbosity
Output
Only "Executing Power On Self Test" is displayed.
Build information and test groups are indicated.
Each step of POST is identified.
"Power-On Sequence" on page
for information about POST.
3-1, the OpenBoot PROM plays a major
Chapter 5 Introduction to Advanced Troubleshooting
"Power-On Self-Test"
5-5