Sun Microsystems Fire 880, Owner'S Manual

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138 Sun Fire 880 Server Owner’s Guide • August 2001
About OpenBoot Emergency Procedures
The introduction of Universal Serial Bus (USB) keyboards with the newest Sun
systems has made it necessary to change some of the OpenBoot emergency
procedures. Specifically, the Stop-N, Stop-D, and Stop-F commands that are available
on systems with standard (non-USB) keyboards are not supported on systems that
use USB keyboards, such as the Sun Fire 880 system. The following sections describe
the OpenBoot emergency procedures for systems with standard keyboards and for
newer systems with USB keyboards.
OpenBoot Emergency Procedures for Systems
With Standard (non-USB) Keyboards
The following table summarizes the Stop key command functions for systems that
use standard (non-USB) keyboards.
OpenBoot Emergency Procedures for Systems
With USB Keyboards
The following paragraphs describe how to perform the functions of the Stop
commands on systems that use USB keyboards, such as the Sun Fire 880 system.
Command Description
Stop Bypass POST. This command does not depend on security mode.
(Note: Some systems bypass POST as a default. In such cases, use
Stop-D to start POST.)
Stop-A Abort.
Stop-D Enter the diagnostic mode (set
diag-switch?
to
true
).
Stop-F Enter Forth on TTYA instead of probing. Use
fexit
to continue
with the initialization sequence. Useful if hardware is broken.
Stop-N Reset NVRAM configuration variables to their default values.