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1.3 Power-On
At power-on, the console program determines the console device type and
console language, then runs the self-tests for the CPU and memory. You
choose the console language when you perform the set-up operations during
your console terminal installation procedure.
You determine the type of power-on mode by setting the Power-On Mode
switch on the CPU console module. See your VAX 4000 Dual-Host Systems
manual for the following power-on information:
•
Power-on procedures
•
Power-On Mode and Break Enable1Disable switch settings
•
Examples of successful power-on sequences
•
Boot and autoboot procedures
See the VAX 4000 '1}-oubleshooting and Diagnostics manual for examples of
problems you may encounter during power-on.
1.4 Console 1/0 Mode Overview
If you set the Break EnablelDisable switch on the console module to enable,
the console program enters Console 110 mode after the power-on self-tests
are completed successfully. The console program also enters Console 110
mode in response to any external halt condition.
CAUTION:
Do
not press the Restart button while the console program is
in console mode. Doing so destroys the system state and prevents normal
operation.
Console I/O mode allows you to control the system by typing commands
at the console prompt
(»».
You may enter these commands in either
uppercase or lowercase letters. Enter each command, then press
IRetum!.
1.4.1 Control Characters in Console I/O Mode
Table
1-1
lists the keypad control characters that have special meaning in
Console I/O mode.
1-4 VAX 4000 Model 300 Technical Information
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