From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <4f2d3f77f7e81e0f1cac4c049b88bbc2@coraid.com>
From: erik quanstrom <quanstro@coraid.com>
Date: Tue, 23 Oct 2007 18:27:23 -0400
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Plan 9 installation disc question
In-Reply-To: <398708D2-A5AB-409F-BCE5-7FA9CC8EFAB4@mac.com>
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> Hello. I have a simple question about the installation disc: it  
> didn't work on my iMac because it stuck on the second line with some  
> four letter word followed by 0C00. I'm not sure what that means, but  
> I think it is because it's trying to boot x86-32 when my iMac is  
> x86-64. Is there a separate installation disc for each processor  
> architecture? Thanks.

x86-64 is compatable with x86-32 in 32-bit mode.  one has to fiddle
cr registers &c to turn on 64-bit mode, just like one has to fiddle
cr registers &c to turn on 32-bit mode.  (maybe efi does this for you.
i don't know.)

since the plan 9 pc kernel doesn't do any 64-bit mode stuff, this should
not be the issue.

the four-letter word is ELCR.  0x0000 -> all edge-triggered 8259 irqs.


- erik