Before I had to kill the Ultrix 4.3 installation on my high
school's Maxine, Mosaic 2.7b5 would crashed the whole computer seemingly
randomly due to an ISDN_DMA error In the systems rc, there was something
like
/usr/local/bin/AF/AF_Maxine with a comment to the effect of Maxine audio
server. I have Ultrix 4.5, but I don't recall seeing anything even
mentioning ISDN or Audio anywhere. (I don't have any docs, just the CD)
My guess is that it probably came along with one of the many patches to 
Ultrix 4.3. I don't have access to the old patches or a TZ30 currently,
would that be of any help to anyone? I suppose I could check the online
documentation CD's but I doubt there is anything on ISDN there.

	Chris

Gregory McGarry wrote:
> 
> Matt Thomas wrote:
> 
> > >My understanding is that the am7930 ISDN interface was a forward-thinking
> > >engineering decision when it was included on the maxine.  Unfortunately
> > >it wasn't implemented correctly, and hence they come with the ISDN
> > >connection covered over.  I think the implementation in the sparc is
> > >usable but AFAICS they cannot do DMA to the chip like the maxine.
> >
> > Not quite true.  There was ULTRIX product that made the ISDN port work.
> > So it is possible.
> 
> Oh, okay.  Well, in that case I can supply a driver for the DMA.  There
> is also an ISDN driver available for the am7930 on sparclinux.
> 
>         -- Gregory McGarry <g.mcgarry@qut.edu.au>