From: "J. Mayer" <l_indien@magic.fr>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] OS/2 PPC booting making some progress
Date: Sat, 21 May 2005 13:57:31 +0200 [thread overview]
Message-ID: <1116676651.15980.61.camel@rapid> (raw)
In-Reply-To: <428EF097.8070704@co.inet.fi>
On Sat, 2005-05-21 at 11:25 +0300, Tero Kaarlela wrote:
[...]
> Hi,
>
> I have made some modifications to PPC PREP booting to get OS/2
> bootloader working. Now I hopefully have made some progress (it isn't
> working yet but has gone forward on my opinion). So I have few questions
> at the moment:
>
> 1. on debug 1. Is the opcode really invalid or just unsupported one?
Yes. The endianness is wrong: if you reverse this opcode, you've got a
valid one.
There may have been a jump to a random place...
> 2. on debug 2. What is this unaffected IO port 838 it tries to read &
> write ?
This port is not documented in the PREP specification. You should check
in the Linux kernel to see if this port seems important. Or you may take
a look to Motorola PowerStack documentation: those boards are well
documented and OS/2 is supposed to know how to boot on it.
> 3. Might that unsupported ioport prevent booting?
Can be possible...
Have to check the code that uses that I/O port...
[...]
--
J. Mayer <l_indien@magic.fr>
Never organized
next prev parent reply other threads:[~2005-05-21 12:04 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-21 8:25 [Qemu-devel] OS/2 PPC booting making some progress Tero Kaarlela
2005-05-21 10:02 ` [Qemu-devel] OS/2 PPC booting making some progress(sorry this has correct entry point :) Tero Kaarlela
2005-05-21 11:57 ` J. Mayer [this message]
2005-05-22 13:49 ` [Qemu-devel] OS/2 PPC booting making some progress Tero Kaarlela
2005-05-23 10:47 ` J. Mayer
2005-05-23 10:54 ` J. Mayer
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