remote debugging?

[Olaf Hering]

On Thu, Jan 06, Andreas Tobler wrote:

> Charles Lepple wrote:
> > 
> > Andreas Tobler wrote:
> > [...]
> [...] 
> > Paul Mackerras wrote some documentation for xmon that you may want to
> > check out. It doesn't seem to be in Documentation/ but it's probably at
> > linuxppc.cs.nmt.edu or something (search the mail archives -- it has
> > been discussed before).
> 
> This docu I have.
> Thanks for the answer. But my problem is much earlier I think.
> 
> I'd like to redirect the console output from the boot of my pm7200 to
> the serial port. This is what doesn't work.
> Neither the printer nor the modem port. 
> 
> When the system is up, I can check the physical connection which works.
> 
> Isn't it possible to get the boot output to the serial port written?

I had such a configuration a few days ago. 7200 -> ix86 with a usual
modem cable.

You need a kernel with support for PowerMac serial port and console on
serial port.
Then give the arguments like described in
Documentation/serial-console.txt :

console=ttyS0,19200 and you will see an output on your console and the
penguin on your screen. It should be possible to log both to serial and
to the screen.

For a first test you should setup a serial login to check the settings
in zterm. Add a line like this in your inittab:
t:23:respawn:/sbin/agetty -L -h 19200

The 23 mean the runlevels and might be different on a RedHat system.
If you can login to your 7200 then the cable and the settings in zterm
are ok. Somehow you always get a little garbage when you login from a
Mac to another Mac. This does not occour from a ix86 machine, I don't
know why.



Gruss Olaf

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