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

[Rene Herman]

On 17-12-07 03:05, H. Peter Anvin wrote:

> Incidentally, I had the thought earlier today that port 0xf0 might be a 
> suitable delay port.  It is used only by the 387-emulating-a-287 hack 
> for IRQ 13, which Linux doesn't use on 486+.

rene@7ixe4:~/src/port80$ su -c ./port80
cycles: out 2400, in 2400
rene@7ixe4:~/src/port80$ su -c ./portf0
cycles: out 2400, in 2400

(Duron 1300)

I suppose you mean using it instead of port 0x80 always and not just as an 
alternate port? For the latter 0xed is alright I guess...


Rene.
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