Subject: Re: Booting a PowerMac 7200 (progress made since last time !!)
To: Tim Kelly <hockey@dialectronics.com>
From: =?ISO-8859-1?Q?R=E9mi_Zara?= <remi_zara@mac.com>
List: port-macppc
Date: 04/23/2005 09:35:35
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Le 22 avr. 05, =E0 20:41, Tim Kelly a =E9crit :

> I'm fifty-fifty on the integrity/viability of the kernel.  The blr=20
> needs
> the previous opcode to load the link register.  If my disassembler=20
> (MacsBug
> on a G4) doesn't know that opcode, I believe it to be highly unlikely=20=

> to
> execute on a 601 chip.  Perhaps the jumpoff point overrides the LR and
> skips this code.

The kernel should not contain any 601 specific code, since I used the=20
standard method to build it, and that the 601 is not (yet :-) )=20
supposed to be supported.
So I would also say corrupted kernel.
If the bootloader jumps into the kernel with the compressed one, I=20
suppose it should also jump into it with the uncompressed one.
With an uncompressed kernel, the boot hangs before the copyright=20
notice. In the install doc, it is sais this may be due to a "real-base"=20=

problem.
My settings are in line with the doc. Why would a bad real-base provoke=20=

a hang ?

I see in your code that you use "ofw_dbg". Do you know if something=20
equivalent is available for NetBSD ?

Is there a quick way to drop back into openfirmware, by provoking an=20
exception for instance, so that I can see how far it goes into the=20
kernel ?

Regards,

R=E9mi Zara

--
R=E9mi Zara
http://www.remi-zara.net/

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