From: Matt Sealey <matt@genesi-usa•com>
To: sumedh tirodkar <sumedhtirodkar@gmail•com>
Cc: linuxppc-dev@ozlabs•org
Subject: Re: yaboot: text mode or graphics mode?
Date: Mon, 05 Jan 2009 19:04:52 -0600 [thread overview]
Message-ID: <4962AE34.3030707@genesi-usa.com> (raw)
In-Reply-To: <d2b9ccd90901042131v2b00bd0bld7009e8d865bd9c7@mail.gmail.com>
They should be mapped into PCI address space with the rest, you should
note though that a bunch of people have asked this a bunch of times and
the response is usually null.
If you want to output debugging info, try a serial port, or if you're
still at the point in boot where the OF is still around, you can still
output to it (check prom_init.c) and if not, the open firmware
framebuffer console driver is your best friend..
sumedh tirodkar wrote:
> Isn't there any other way that i can access the VGA registers? So as
> to reconfigure them...
>
> -Sumedh
>
> On Wed, Dec 31, 2008 at 4:15 AM, Matt Sealey <matt@genesi-usa•com> wrote:
>> sumedh tirodkar wrote:
>>> I just found out that openfirmware boots into graphics mode(non-text
>>> mode). Now i wish to switch back to text mode. how do i do this?
>> Unfortunately unless you are running some kind of yaboot-accessible or
>> firmware-accessible x86 BIOS emulation, this isn't possible.
>>
>> --
>> Matt
>>
prev parent reply other threads:[~2009-01-06 1:04 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-20 16:07 yaboot: text mode or graphics mode? sumedh tirodkar
2008-12-20 17:56 ` sumedh tirodkar
2008-12-30 22:45 ` Matt Sealey
2009-01-05 5:31 ` sumedh tirodkar
2009-01-06 1:04 ` Matt Sealey [this message]
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