> In message <41F27E3E.5090400@tastylime.net>, Jeff Rizzo writes:
> >Chris Ross wrote:
> >
> >>
> >> On Jan 21, 2005, at 14:52, David Laight wrote:
> >>
> >>> On Fri, Jan 21, 2005 at 11:51:44AM -0700, Co Thai Ngo wrote:
> >>>
> >>>> Hi,
> >>>>
> >>>>  I would like to install NetBSD 2.0 by using a serial console with 
> >>>> boot-com. But I don't
> >>>>  know if there is any way so that I could change the baud rate when 
> >>>> booting the
> >>>>  computer with boot-com without rebuilding the sources. I have to 
> >>>> use the dafault baud
> >>>>  rate 9600 while my computer can run with the baud rate 115200. Any 
> >>>> suggestion and
> >>>>  comment is appreciated.
> >>>
> >>>
> >>> For NetBSD 2.0, you should just use the normal bootxx_ffsv1 (or 
> >>> equivalent
> >>> for the root filesystem type).  You can set the baudrate using the
> >>> -o speed=<baud rate> option to installboot (use -o console=com0 to 
> >>> select
> >>> a serial console).
> >>
> >>
> >>   David, I think you're misunderstanding his question.  He wants to 
> >> perform
> >> the *install* using a serial console.  I do this all the time, but I 
> >> must admit,
> >> mostly on sparc's, where it's much easier.
> >>
> >>   Looking at the man page for boot(8), there is of course the consdev 
> >> command.
> >> But, as you note, it simply allows you to specify use of a serial 
> >> console, not
> >> its baud rate.  I myself don't see a way to specify it.  Someone more 
> >> familiar
> >> with the boot code will have to speak up.
> >>
> >>   If it isn't possible, it should be.  I presume it wouldn't be too 
> >> hard to add this
> >> to the bootloader...
> >>
> >>                                          - Chris
> >
> >
> >I think you're misunderstanding David's answer.  You can use installboot 
> >to set the speed of the serial console for the bootblocks on the
> bootfloppy.
> >
> >Something like (not tested):
> >
> >installboot -o console=com0,speed=115200 /dev/fd0a /usr/mdec/bootxx_ffsv1
> >
> >(this really doesn't belong on current-users;  either netbsd-help or 
> >port-i386 would have been more appropriate)
> 
> 
> I read the question the same way Chris did: can you *run* sysinst 
> >from a serial console at a different baud rate than 9600?
> 
> 		--Prof. Steven M. Bellovin, http://www.cs.columbia.edu/~smb
> 
> 

Yes, you can run sysinst from a serial console at a different baud rate than
9600. 

You have to modify following Makefile in the sources:

/usr/src/distrib/i386/floppies/bootfloppy-big/Makefile

add this line:

FLOPPYBOOTOPTIONS=      -o console=com0,speed=57600

This is for example 57600 Baud, com0.

Now, you have to build a new release. (build.sh -x release)
The file boot.big.fs now boots from console with 57600.
This is also the way to install NetBSD to a dedicated Rootserver via a
rescue console, like big hosting companies used to use.

Best regards, Zafer.