On Thu, 14 Mar 2002, John Heil wrote:
>
> No, the better/correct port is 0xED which removes the conflict.
Port ED is fine for a BIOS, which (by definition) knows what the
motherboard devices are, and thus knows that ED cannot be used by
anything.
But it _is_ an unused port, and that's exactly the kind of thing that
might be used sometime in the future. Remember the port 22/23 brouhaha
with Cyrix using it for their stuff, and later Intel getting into the fray
too?
So the fact that ED works doesn't mean that _stays_ working.
The fact that 80 is the post code register means that it is fairly likely
to _stay_ that way, without any ugly surprises.
Now, if there is something _else_ than just the fact that it is unused
that makes ED a good choice in the future too, that might be worth looking
into (like NT using it for the same purpose as Linux does port 80),
Linus
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Fri Mar 15 2002 - 22:00:18 EST