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Re: [Qemu-devel] Running Plan9
From: |
Lars Munch |
Subject: |
Re: [Qemu-devel] Running Plan9 |
Date: |
Thu, 2 Dec 2004 10:51:26 +0100 |
User-agent: |
Mutt/1.5.6+20040907i |
On Wed, Dec 01, 2004 at 10:32:53PM +0000, Brian Campbell wrote:
> Being a little curious about Bell Lab's Plan 9 I tried to get the
> installation/demo CD running under qemu. The major stumbling block I
> encountered was that the IDE emulation wasn't properly detected. A
> little bit of debugging revealed that Plan 9 was relying on an
> an IDE feature that hasn't been implemented in qemu.
>
> Adding some very shoddy (and almost certainly wrong) support for
> WIN_DIAGNOSE to ide_ioport_write in hw/ide.c was enough to get it to boot
> and run the live version. Is anyone likely to provide a proper
> implementation? I'd do it myself, but the (draft) ATA specs I had a look
> through appeared to have some oddities I'd rather not have to deal with,
> given that I've never done any ATA work before.
I had the same problem when I tried to get the ide driver going in
RTEMS, since it also depends on WIN_DIAGNOSE. I also added quick version
of the WIN_DIAGNOSE command (just setting error register to 01h) and
RTEMS found the disc.
I just looked at the ATA specs. What oddities are you referring to?
Regards
Lars Munch