Digital Equipment DECstation 5000/100 Series, Maintenance Manual

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Booting the System Software
Use the boot command to boot the system.
Booting a system can take several minutes. If the system
displays the ULTRIX prompt
#
before the
login:
prompt
appears, press Ctrl-d to continue the boot operation.
If the boot is successful, the monitor displays the
login:
prompt.
If the system fails to boot, do the following:
1.
Use the printenv command to display the environment
variables table.
2.
Use the setenv command to set the boot environment
variable to a device or to the network that contains the
system software that you want to use to boot.
3.
Use the boot command to boot the system.
For a detailed explanation of these console commands, refer to
Appendix C.
If the system still does not boot, check any boot error messages
that appear on the monitor. Refer to Appendix C to find the
meaning of boot error messages.
Setting System Boot ROM Switches
The Boot ROM on the system module does not need to be
replaced, because there is a Boot ROM on the R4000 CPU. Two
switches on the R4000 control the access to the Boot ROM.
Refer to Figure 2-10 for location of switches. Switch one must
be off. Switch two must be on.
Note: Note the orientation of the switches. Switches pointing to the
ON postion are on, switches pointing towards the 1, 2 are off.
2–18 Service Operations