Apparently these the serial ports on older sparcs are not unlike newer
Intel chips- some can go well beyond spec and some cannot.  I haven't
had any luck with my Sparc 2 getting above the 38400 specification.  If
you can't get 57600 on your serial port, you might try just using
38400, which isn't a huge performace hit, especially if you use
compression.  Of course, my 56K modem rarely connected above 40K, but
you might have better luck.  If you're going to spend money though, you
might just buy a cheap NIC and a crossover cable.

Blair

--- Toby Thain <toby@disegno.com.au> wrote:
> I can recommend MAGMA products ( http://www.magma.com/ ) -
> I use an LC 2+1 Sp ( http://www.magma.com/sbus/sbus_lc2+1sp.html )
> with
> an IPX.
> NetBSD has drivers but I am currently using it with SunOS 4.
> 
> NetBSD 1.4/1.5 handle a 56k on built-in serial ports without problems
> in
> my experience on SS1/SS1+  with ipf & ipnat (at full throughput,
> interrupt load seems to be 30-50% according to systat but no evidence
> of
> overruns, unlike SunOS 4).
> 
> Toby
> 
> Chris.Smith@raytheon.co.uk wrote:
> > 
> > Hi,
> > 
> > Anyone know of a good `fast' serial port SBus card for
> > a Sun Classic workstation?  i.e. one that wil support
> > a 56k modem without falling over like the internal
> > ports do :P  I assume that putting one of these in it
> > would make it good for a 56k internet router compared
> > to a doorstop (it's current task :).
> > 
> > Obviously, it's got to work nicely with NetBSD 1.5!
> > 
> > Cheers,
> > 
> > - Chris.


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