Sun E250, NVRAM edit? (Serial Speeds, no console, etc)
ethan at 757.org
Mon Jul 20 10:33:06 CDT 2020
> In theory console can be set to anything but its usually 9600/8/n/1 as
> I’m sure you’ve tried.
Oh yea, I see the diags at that speed but everything else is noise. Memory
is kind of hazy since it was 2008 era, but back then I had a Livingston
Portmaster PM-25 hooked to all the colo hosts and I seem to recall this
Sun box never working right. But the owner had it working over ethernet
and didn't care.
I spent all weekend camping / diving so I didn't get back to it. But going
to try to dump the contents of the NVRAM into a file to back it up. Then I
will see if things are plain text or not. If not, maybe try all FF's so I
have a working NVRAM to satisfy it. If it is text, there is definitely a
checksum as I recall. But maybe I can just nuke out the serial console
statement (graphics console disable), and then it will complain about a
checksum mismatch but continue to go?
With the NVRAM out I get graphics console but can never type and it seems
> On some suns unplugging the serial cable is the equivalent of sending a break, so might be worth a try?
> Suns do require full hardware signalling on the console connection so might be worth checking.
Hmm I tried sending hard breaks via Putty / Hyperterminal. I was using an
older Dell laptop with a physical RS232 port on it (not USB dongle.) But I
will try that. Also I can't remember how the serial port A works with
regards to the lights out management port? That serial data is somehow
split between the two?
I will definitely mess with it this week. Motivation is high to get it
working then find it and the ultra 5 a home.
Thanks for the reply! Will poke then report back.
: Ethan O'Toole
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