Re: port-i386/46247: 6.0 Beta boot fails on generic i386 architecture machine

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

The following reply was made to PR port-i386/46247; it has been noted by GNATS.

From: David Laight <david%l8s.co.uk@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: port-i386/46247: 6.0 Beta boot fails on generic i386 architecture 
machine
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 
 > GNATS.
 >  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
 of /boot.
 
 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
 bios call.
 
        David
 
 -- 
 David Laight: david%l8s.co.uk@localhost