Operations 1-51
Halt Assertion with RMC Haltin Command
Enter the RMC haltin command at any time except during power-up. For
example, enter haltin during an operating system session or when the
AlphaBIOS console is running.
If you enter the RMC haltin command during a Tru64 UNIX or OpenVMS
session, the system halts back to the SRM console, and the halt status is saved.
The next time the system powers up, the saved halt status is checked.
If you enter the RMC haltin command when Windows NT or AlphaBIOS is
running, the interrupt is ignored. However, you can enter the RMC haltin
command followed by the RMC reset command to force a halt assertion. Upon
reset, the system powers up to the SRM console, but the SRM console does not
load the AlphaBIOS console.
Clearing a Halt Assertion
Clear a halt assertion as follows:
•
If the halt assertion was caused by pressing the Halt button or remotely
entering the RMC halt command, the console uses the halt assertion once,
then clears it.
•
If entering the RMC haltin command caused the halt assertion, enter the
RMC haltout command or cycle power on the local system.
Disabling Autoboot
The system automatically boots the selected operating system at power-up or
reset if the following environment variables are set:
•
For Tru64 UNIX and OpenVMS, the SRM environment variables os_type,
auto_action, bootdef_dev, boot_file, and boot_osflags
•
For Windows NT, the SRM os_type environment variable and the Auto
Start selection in the AlphaBIOS Standard CMOS Setup screen
You might want to prevent the system from autobooting so you can perform
tasks from the SRM console. Use one of the methods described previously to
force a halt assertion. When the SRM console prompt is displayed, you can enter
commands to configure or test the system. Chapter 2 describes the SRM
console commands and environment variables.
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