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Re: SGI O2 Prom modification

To: linux-mips@linux-mips.org
Subject: Re: SGI O2 Prom modification
From: Jan-Benedict Glaw <jbglaw@lug-owl.de>
Date: Wed, 8 Sep 2004 14:13:33 +0200
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On Wed, 2004-09-08 01:31:29 -0400, Kumba <kumba@gentoo.org>
wrote in message <413E9931.8060605@gentoo.org>:
> Glenn Barry wrote:
> >My question is about the possibility of someone helping out with 
> >modifying the O2's PROM to recognise the RM7900 CPU from PMC-Sierra.
> 
> Modifying the binary is most assuredly way more difficult than gaining 
> access to ip32PROM source and modifying it directly (and solving license 
> issues). The level of change to the binary needed to make the ip32PROM 

I'd not bet my a** on that. Modifying the binary firmware has got a 
long, but rare, history. I remeber hacked PROM images for VAXen to
support larger SCSI disks. As long as you don't require a detailled CPU
detection, that should be possible. Hardcoding some values isn't all
thaaat hard. Making it correctly (preserving the formerly running
detection code for other CPUs) is a bit harder, of course :-)

MfG, JBG

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