Sun Microsystems 440 manual OpenBoot Emergency Procedures

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 were available on systems with non-USB keyboards are not supported on systems that use USB keyboards, such as the Netra 440 server. If you are familiar with the earlier (non-USB) keyboard functionality, this section describes the analogous OpenBoot emergency procedures available in newer systems that use USB keyboards.

OpenBoot Emergency Procedures for Systems With Non-USB Keyboards

TABLE 2-1summarizes the Stop key command functions for systems that use standard (non-USB) keyboards.

TABLE 2-1Stop Key Command Functions for Systems With Standard (Non-USB) Keyboards

Standard (Non-USB)
Keyboard Command	Description
Stop	Bypass POST. This command does not depend on security
	mode.
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 when there
	is a hardware problem.
Stop-N	Reset OpenBoot configuration variables to their default
	values.

Chapter 2 Managing RAS Features and System Firmware 39