Subject: Re: Frustrated NetBSD 1.3/Amiga user
To: None <port-amiga@NetBSD.ORG>
From: Ignatios Souvatzis <is@jocelyn.rhein.de>
List: port-amiga
Date: 03/04/1998 23:20:21
>
> Hi!
>
> > "We", for a set of people you might expect an answer from, know that there's
> > a problem, and even have a good hint what the problem is.
>
> It's great to hear, that at least it has been accepted, that there *is*
> a problem. Can anybody of "us", who own Ariadnes, do anything to help
> "you"?
>
> BTW: I remember the question if I was using my ethernet card via BNC
> or TP. Is this part of the problem? In other words: Are there no
> problems when using the TP connection?
AFAIK, none.
Actually, I've run my DraCo as a gateway between TP Ethernet and
ARCnet for a weekend, routing MBONE for extended time, with an Ariadne.
I guess I would have noticed TP-specific stuff.
No, as I understand, the Ariadne may only be accessed 16 bits at a time,
and the buffer end rounding code is broken in a way that it might cross page
boundaries at the beginning or end of a mbuf segment. Now, if that mbuf happens
to be at the exact end of a mapped kernel address space segment, you have a
problem.
The hackaround is a bit tricky, because you also want it to not cross the lower
page boundary, to be on the safe side.
-is