Re: Linux Post codes during runtime, possibly OT
H. Peter Anvin (hpa@zytor.com)
25 Jan 2001 14:26:36 -0800
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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/