C-2
CRBRIM-W/T
Appendix C: Bootstrap Program
The new configuration register value, 0x0, takes effect after the router is rebooted.
If the configuration is set to 0x0, the system will have to be manually booted each
time the router is rebooted.
C.1.1 Available Bootstrap Commands
After you are in the bootstrap mode, enter ? at the > prompt to display a list of
available commands and options, as follows:
?
$Toggle cache state
B [filename][TFTP Server IP address | TFTP Server Name]
Load and execute system image from ROM or from
TFTP server
C [address]Continue [optional address]
D /S M L VDeposit value V of size S into location L with
modifier M
E /S M LExamine location L with size S with modifier M
G [address]Begin execution
HHelp for commands
IInitialize
KDisplays Stack trace
L [filename][TFTP Server IP address | TFTP Server Name]
Load system image from ROM or from TFTP server,
but do not begin execution
OShow software configuration register option
settings
PSet break point
SSingle step next instruction
T functionTest device (? for help)
Deposit and Examine sizes may be B (byte), L (long) or S
(short).
Modifiers may be R (register) or S (byte swap).
Register names are: D0-D7, A0-A7, SS, US, SR, and PC.
TIP
Break (system interrupt) is always enabled for 60 seconds after
rebooting the system, even if break is configured to be off by setting
the configuration register. During the 60-second window, you can
break to the bootstrap program prompt.