Oracle Vacuum Cleaner CPU-56T User Manual

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NVRAM Boot Parameters
OpenBoot Firmware
SPARC/CPU−56T
97
NVRAM Boot Parameters
The OpenBoot firmware holds its configuration parameters in NVRAM. To see a list of all
available configuration parameters, enter at the Forth Monitor prompt:
a
printenv
As you can see in the list, the default setting is for the CPU board to boot the operating
system automatically. If this is not the case, ensure that the <auto−boot?> parameter is set
to true.
To set specific parameters, use the setenv command as follows:
a
setenv
<configuration_parameter> <value>
The configuration parameters in the following table are involved in the boot process.
Table 17:
 OpenBoot Configuration Parameters
Parameter
Default Value
Description
auto−boot?
true
If true, automatic booting after power on or reset
boot−device
disk
Device from which to boot
boot−file
empty string
File to boot
diag−switch?
false
If true, run in diagnostic mode, test results are
shown, boot up takes longer
If false, normal mode, short boot up
diag−device
net
Device from which to boot in diagnostic mode
diag−file
empty string
File to boot in diagnostic mode
When booting an operating system or another stand−alone program, and neither a boot
device nor a filename is supplied, the boot command of the Forth monitor takes the
omitted values from the NVRAM configuration parameters. If the parameter
<diag−switch?> is false, the parameters <boot−device> and <boot−file> are used.
Otherwise, the OpenBoot firmware uses the parameters <diag−device> and <diag−file>
for booting.