Attached is a patch as well as an example program, where I took the code 
from the from the linux kernel and made a call in with a dummy packet.

It appears the problem is the addic translation does not correctly 
set/reset the carry bit, and this is a regression vs the source base on 
3/7/2007.  With the change here, I can boot the ppc-prep machine again 
and use ethernet.

If you would like a pre-compiled binary of the test case, let me know 
because it was too big to send to the list.

signed-off-by: jason.wessel@windriver.com

Jason.

J. Mayer wrote:
> Hi,
>
> My concern is I cannot reproduce your problem for the following reasons:
> - the PREP machine (and the heathrow too...) is broken and cannot even
> boot. PCI and/or IRQ are broken, so the Linux kernel hangs.
> - when using the "known to work" Linux distributions on the mac99
> machine (please take a look at the STATUS file), I am able to download a
> kernel from www.kernel.org, which makes me think TCP packets are sent
> and received correctly, with valid checksums.
>
> Then, it would be a great thing if you could isolate the failing routine
> and, for example, make a test case usable with linux-user emulation.
> This would be a great help to solve this issue.
>
> Thanks by advance.
>
>