B-1
Hardware Installation Guide
B-1
Hardware User’s Guide
Appendix B
Virtual Configuration Register
This appendix describes the CRBRIM-W/E virtual configuration register, the
factory default settings, and procedures for changing settings.
Following is the information included in this appendix:
•
Virtual configuration register settings
•
Explanation of boot field
•
Changing configuration register settings
•
Virtual configuration register bit meanings
•
Default boot filenames
•
Virtual configuration register settings for broadcast address destination
•
System console terminal baud rate settings
•
Enabling booting from Flash
•
Copying to Flash
B.1
Virtual Configuration Register Settings
The CRBRIM-W/E has a 16-bit virtual configuration register, which is written
into the nonvolatile random-access memory (NVRAM). Some reasons for
changing the virtual configuration register settings are:
•
Set and display the configuration register value
•
Force the system into the bootstrap program
•
Select a boot source and default boot filename
•
Enable or disable the Break function
•
Control broadcast addresses
•
Set the console terminal baud rate
•
Load operating software from ROM
•
Enable booting from a Trivial File Transfer Protocol (TFTP) server
Table B-1 lists the meaning of each of the virtual configuration memory bits, and
Table B-2 defines the boot field names.
