Subject: Re: smp boot halt
To: Chan Yiu Wah <>
From: Brett Lymn <>
List: tech-smp
Date: 03/10/2000 12:04:51
According to Chan Yiu Wah:
>Sorry, I don't how to dump the exact messages.

With some help from Bill, here is what I did to make the boot floppies
use com0 as the console port (people who have been there, done this
and got the t-shirt can move along as there is nothing to see here ;-):

On a running -current system with a source tree:

cd /usr/src/sys/arch/i386/stand/biosboot_com0

This will build the serial boot blocks.  Now, copy the boot1.fs to a
floppy and leave the floppy in the drive and type this:

/usr/mdec/installboot -v -b 17 /usr/src/sys/arch/i386/stand/biosboot_com0/biosboot_com0.sym /dev/rfd0a

Note that the above line is a single command line - you can shorten it
if you cd into the biosboot_com0 directory.

You now have a boot floppy that will talk out com0 when you boot a
machine with it.  The next step is to hook up another machine to com0
of your MP box, check the serial connection works ok by running
something like kermit on both sides and checking you can type
characters (from _both_ sides).  Once this is all ok, turn on logging
on the machine acting as your serial terminal (in kermit you can use
"log session logname" to log to a file called logname), whack the
serial boot floppy in the drive and reboot your MP machine.  You will
then be able to post a nice boot message showing what is going wrong.

Brett Lymn, Computer Systems Administrator, BAE SYSTEMS