Re: Soekris 4801 craziness: pxeboot

[David Laight <david%l8s.co.uk@localhost>]

On Sat, Oct 15, 2005 at 10:13:25AM -0400, Steven M. Bellovin wrote:
> Still not working quite right.  How do I set the serial console speed 
> for pxeboot_com0?  It looked like a compile-time option I wasn't sure 
> where to set.  For obvious reasons, I'd like to set it to whatever 
> speed I'm running my Soekris console at; for equally obvious reasons, 
> I'd like that as fast as possible.

Possibly just patch the header at the start of pxeboot.bin.
(Like installboot does when copying bootxx_xxfs onto the disk.)

00000000  eb 7e 89 f6 d3 b6 86 78  78 00 00 00 00 00 00 00  |.~.....xx.......|
00000010  05 00 00 00 00 00 00 00  80 25 00 00 00 00 00 00  |.........%......|
                      ^ condev     ^ baud

IIRC changing condev to 01 will make it use the serial console.

Maybe we should make a baud of zero read the divider registers...
Also installboot could have an option to patch an existing binary.

        David

-- 
David Laight: david%l8s.co.uk@localhost