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Cisco uBR924 Software Configuration Guide
OL-0337-05 (8/2002)
Appendix C Using the ROM Monitor
Command Conventions
Router(config)# config-reg 0x0
The new configuration register value, 0x0, takes effect after the router is rebooted with the reload
Privileged EXEC command. If you set the configuration to 0x0, you will have to manually boot the
system from the console each time you reload the router.
Note After you have entered the ROM monitor, you can return to the normal boot mode by changing the
configuration register value to 0x2103, using the confreg 0x2102 ROMMON command. Then reboot the
system using the reset ROMMON command.
Command Conventions
Following are ROM monitor command conventions:
• Brackets [ ] denote an optional field. If a minus option is followed by a colon (for example: [-s:]),
you must provide an argument for the option.
• A word in italics means that you must fill in the appropriate information.
• All address and size arguments to the memory-related commands are assumed to be hexadecimal
(no “0x” prefix or “h” suffix needed).
• The options [-bwl] for the memory-related commands provide for byte, word, and longword
operations. The default is word.
• You can invoke the memory-related commands by typing the command with no arguments. This
causes the utility to prompt you for parameters. This option is available for the commands marked
as prompting.
• You can place more than one command (except the repeat command) on a line by using the “;”
delimiter.
Commands
Enter ? or help at the rommon > prompt to display a list of available commands and options:
rommon 12 > help
alias set and display aliases command
boot boot up an external process
confreg configuration register utility
cont continue executing a downloaded image
context display the context of a loaded image
cookie display contents of cookie PROM in hex
dev list the device table
dir list files in file system
dnld serial download a program module
frame print out a selected stack frame
help monitor builtin command help
history monitor command history
meminfo main memory information
repeat repeat a monitor command
reset system reset
set display the monitor variables
stack produce a stack trace
sync write monitor environment to NVRAM