Here's something I stumbled on.
Been playing with it on our lab system. I'd recommend not doing this on a production system.
From the RTC enter:
lkup "<string>"
Replace the <string> with something like "msg". Or enter something like this: lkup "ping"
The system will spit out all the commands with that in it.
Seen some interesting stuff. Commands I never seen.
Play a bit if you can. If you find something let us know.
Ralph