Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override.

[H. Peter Anvin]

Christer Weinigel wrote:
> Both 0xed and 0xf0 are mapped to internal functions on the AMD Elan
> SC400 processor.  It is an AMD 486 based system on a chip and since AMD
> just knew that it would never have a math coprocessor, they reused the
> 0xf0-0xf2 range for the PCMCIA controller.  I guess the AMD Elan SC500
> will have similar problems.
>
> I seem to recall that back when I was working with the Elan SC400
> (sometime around 1998?) there were discussions about finding an
> alternate delay port because outb to 0x80 messed up the debug port.  I
> think the Elan stopped those discussions because just about every port
> on the Elan was reused for some alternate purpose.  

Yeah, the Elan is not supportable anyway without a CONFIG option (it's 
broken in so many ways), so it doesn't really apply.  It's a fuckwit design.

	-hpa
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