Re: [linux-kernel] Re: [PATCH] x86: provide a DMI based port 0x80I/O delay override.

From: Rene Herman
Date: Fri Jan 11 2008 - 09:53:15 EST


On 11-01-08 15:35, David P. Reed wrote:

Rene Herman wrote:
On 11-01-08 02:36, Zachary Amsden wrote:

FWIW, I fixed the problem locally by recompiling, changing port 80 to port 84 in io.h; works great, and doesn't conflict with any occupied ports.

Might not give you a "proper" delay though. 0xed should be a better choice...

I don't think there is any magic here.

Golly, you don't think so? Just commenting on his local hack. Port 0x84 is inside the (reserved) DMA page register range and stands a better chance of not being echoed onto ISA by various chipsets than 0xed does due to that.

Yes -- on a sane machine it's all useless anyway and with all sane machines this discussion would've ended quite some time ago already. It's the insane, obsolete legacy junk that's the problem.

Rene.
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