Specifications

ROM Monitor Commands
ROM Monitor B-7
• reset or i—Resets and initializes the system, similar to power-on.
• set—Displays all the monitor variables and their values.
• stack [num]—Produces a stack trace of the num frames. The default is 5. The command dumps
from the kernel stack and the process stack (if one is available) of a booted image.
For example:
rommon 5 > stack 8
Stack trace:
PC = 0x02004adc
Frame 00: FP = 0x02003938 RA = 0x02005f2a
Frame 01: FP = 0x02003948 RA = 0x02005df0
Frame 02: FP = 0x02003960 RA = 0x020050ee
Frame 03: FP = 0x02003994 RA = 0x02004034
Frame 04: FP = 0x02003b00 RA = 0x00012ca6
• sync—Writes the working in-core copy of the environment variables and aliases to NVRAM so
that they are read on the next reset.
• sysret—Displays the return information from the last booted system image. This includes the
reason for terminating the image, a stack dump of up to eight frames, and if an exception is
involved, the address where the exception occurred.
For example:
rommon 8 > sysret
System Return Info:
count: 19, reason: user break
pc:0x60043754, error address: 0x0
Stack Trace:
FP: 0x80007e78, PC: 0x60043754
FP: 0x80007ed8, PC: 0x6001540c
FP: 0x80007ef8, PC: 0x600087f0
FP: 0x80007f18, PC: 0x80008734
• unalias name—Removes name and its associated value from the alias list.
• unset varname—Removes the variable name from the variable list.
• xmodem [- yc] destination_file_name—Downloads a system image to the boot Flash memory
over the console port. The -y option performs the download. The -c option performs the download
using 16-bit CRC error checking. The xmodem transfer protocol supports a 128-byte block size
and the transfer begins with a block number starting at 1, which contains file data. This is the
default transfer protocol.