Openboot Emergency Procedures; Openboot Emergency Procedures For Systems With Standard (Non-Usb) Keyboards - Sun Microsystems Sun Blade 150 Service Manual

10
C H A P T E R

OpenBoot Emergency Procedures

The introduction of USB keyboards has made it necessary to change the Stop-N,
Stop-D, and Stop-F commands. The following sections describe the OpenBoot
emergency procedures for systems with standard keyboards and for newer systems
with USB keyboards.
10.1 OpenBoot Emergency Procedures for
Systems With Standard (Non-USB)
Keyboards
When issuing any of these commands, hold down the keys immediately after
turning on the power to your system, and keep them pressed for a few seconds until
the keyboard LEDs flash.
Command
Stop
Stop-A
Stop-D
Stop-F
Stop-N
Description
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).
Abort.
Enter the diagnostic mode (set diag-switch? to true).
Enter Forth on TTYA instead of probing. Use fexit to continue
with the initialization sequence. Useful if hardware is broken.
Reset NVRAM contents to default values.
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