Console Mode; Entering Console Mode; Exiting Console Mode; Environment Variables - DEC Digital Alpha VME 4/224 User Manual

3.2 Console Mode

Sections 3.2.1 and 3.2.2 explain how a Digital Alpha VME 4 system enters and
exits console mode.

3.2.1 Entering Console Mode

A Digital Alpha VME 4 module enters console mode automatically when the
POST is finished. A Digital Alpha VME 4 module also enters console mode when:
• You press the Reset/Halt switch on the front panel.
Depending on the operating system and applications running at the time,
this could damage application files that are open and have not been saved.
• The module receives a VMEbus Reset signal and configuration switch 3 on
the module is enabled.
Depending on the operating system and applications running at the time,
this could damage application files.
• You use the operating system command to enter console mode.
• The operating system executes a HALT instruction.
• The operating system encounters a fatal error.

3.2.2 Exiting Console Mode

You can exit console mode by issuing the boot, start, or continue command. For
more information, use the help command or see Chapter 13.

3.3 Environment Variables

From the console, you can configure your Digital Alpha VME 4 system by setting
the values of environment variables. You set the values of environment variables
by using the console command set. You can also display the current settings of
environment variables by using the show command.
Caution
Caution
Operating the Digital Alpha VME 4 Computer 3–3