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Re: port-i386/46247: 6.0 Beta boot fails on generic i386 architecture machine
The following reply was made to PR port-i386/46247; it has been noted by GNATS.
From: David Laight <david%l8s.co.uk@localhost>
Subject: Re: port-i386/46247: 6.0 Beta boot fails on generic i386 architecture
Date: Tue, 27 Mar 2012 07:57:24 +0100
On Tue, Mar 27, 2012 at 06:50:05AM +0000, John Refling wrote:
> The following reply was made to PR port-i386/46247; it has been noted by
> How can I help debug this?
Generally at printfs :-)
I think there is one at the start of /boot (unless someone removed it).
Since you aren't seeing that, something must be going on in the bootxx code.
bootxx only has access to 'print string' and 'print value' functions,
but they are usually enough.
I'd make sure there are no 'clear screen' calls, then output somthing
just before bootxx jumps into /boot, and something right at the top
Might be a size issue...
Maybe some of the memory areas used contain bios data (I've NFI how
to find out which areas are actually usable while you still want
to make bios calls).
If you suspect bios issues, can be worth using the direct serial
console versions of stuff - in particular the code can then write
from 32bit mode without having to switch to 16bit code for the
David Laight: david%l8s.co.uk@localhost
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