2-12 Computer Group Literature Center Web Site
Startup and Operation
2
At power-up, Network Boot is enabled and (provided that the drive and
controller numbers encountered are valid) the following message is
displayed upon the system console:
Network Boot in progress... To abort hit <BREAK>
After this message, there is a delay to let you abort the Auto Boot process
if you wish. Then the actual I/O is begun: the program designated within
the volume ID of the media specified is loaded into RAM and control
passes to it. If you want to gain control without Network Boot during this
time, however, you can press the <BREAK> key or use the software
ABORT or RESET switches.
Network Auto Boot is controlled by parameters contained in the NIOT
and ENV commands. These parameters allow the selection of specific
boot devices, systems, and files, and allow programming of the Boot delay.
Refer to the ENV command description in Chapter 3 for more details.
Restarting the System
You can initialize the system to a known state in three different ways:
Reset, Abort, and Break. Each method has characteristics which make it
more suitable than the others in certain situations.
A special debugger function is accessible during resets. This feature
instructs the debugger to use the default setup/operation parameters in
ROM instead of your own setup/operation parameters in NVRAM. To
activate this function, you press the
RESET and ABORT switches at the
same time. This feature can be helpful in the event that your
setup/operation parameters are corrupted or do not meet a sanity check.
Refer to the ENV command description in Chapter 3 for the ROM
defaults.
Reset
Powering up the MVME162P4 initiates a system reset. You can also
initiate a reset by pressing and quickly releasing the
RESET switch on the
MVME162P4 front panel, or reset the board in software.
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