Re: Linux Post codes during runtime, possibly OT

From: Matthew Dharm (mdharm-kernel@one-eyed-alien.net)
Date: Thu Jan 25 2001 - 17:31:27 EST

It occurs to me that it might be a good idea to pick a different port for
these things. I know a lot of people who want to use port 80h for
debugging data, especially in embedded x86 systems.

Matt

On Thu, Jan 25, 2001 at 02:26:36PM -0800, H. Peter Anvin wrote:
> Followup to: <3A709E99.25ADE5F6@echostar.com>
> By author: "Ian S. Nelson" <ian.nelson@echostar.com>
> In newsgroup: linux.dev.kernel
> >
> > I'm curious. Why does Linux make that friendly 98/9a/88 looking
> > postcode pattern when it's running? DOS and DOS95 don't do that.
> >
> > I'm begining to feel like I can tell the system health by observing it,
> > kind of like "seeing the matrix."
> >
>
> It output garbage to the 80h port in order to enforce I/O delays.
> It's one of the safe ports to issue outs to.
>
> -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
> -
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-- 
Matthew Dharm                              Home: mdharm-usb@one-eyed-alien.net 
Maintainer, Linux USB Mass Storage Driver

I say, what are all those naked people doing?
					-- Big client to Stef
User Friendly, 12/14/1997
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