From mboxrd@z Thu Jan  1 00:00:00 1970
Message-Id: <199909101833.UAA17210@piglet.cpu.lu>
Date: Fri, 10 Sep 1999 20:33:11 +0200 (CEST)
From: Michel Lanners <mlan@cpu.lu>
Reply-To: mlan@cpu.lu
Subject: Re: controlfb.c bug in VRAM bank2 check if bank1
To: ldl@chpc.utah.edu
cc: linuxppc-dev@lists.linuxppc.org
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On  10 Sep, this message from Lou Langholtz echoed through cyberspace:
> After getting an extra 2MB VRAM for my PowerMac7500 and seeing that only
> 2MB were still being recognized (despite having just added the 2MB to
> total to 4MB VRAM), I dug into the controlfb.c code from 2.2.11 and
> 2.2.12 and made the following changes to get all 4MB VRAM recognized:

> <  out_8(&p->frame_buffer[0x600000], 0xa5);
> <  out_8(&p->frame_buffer[0x600001], 0x38);
> ---
>>  out_8(&p->frame_buffer[0x200000], 0xa5);
>>  out_8(&p->frame_buffer[0x200001], 0x38);

Hmm, if I remember right, there have been half a dozen patch pairs that
changed 0x600000 to 0x200000 and back over the years ;-)

I guess it's time to clear thgis up once and for all. By the way, I do
have 4 MB of VRAM, and all of it is detected with the current version
of controlfb.....

Michel

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