Re: IO delay, port 0x80, and BIOS POST codes

H. Peter Anvin (hpa@zytor.com)
14 Mar 2002 13:11:56 -0800


Followup to: <Pine.LNX.4.33.0203141234170.1286-100000@scsoftware.sc-software.com>
By author: John Heil <kerndev@sc-software.com>
In newsgroup: linux.dev.kernel
>
> No, the better/correct port is 0xED which removes the conflict.
>
> We've used 0xED w/o problem doing an embedded linux implementation
> at kernel 2.4.1, where SMM issues were involved. (It was recommended
> to me by an x-Phoenix BIOS developer, because of its safety as well as
> conflict resolution,
>

Sorry, causes breakage on quite a few machines. I used it briefly in
SYSLINUX. Phoenix doesn't have that issue since they're part of the
platform, so they can make it a requirement for their BIOS.

-hpa

-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt	<amsp@zytor.com>
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