You can't do this with a "standard" PeeCee serial port -- 115,200 is as
high as she goes (there's probably a little extra slop left at the top,
but not much).  You probably wouldn't want to, anyway.

You should buy a (couple) Hayes ESP cards if you're serious about this.
They can support up to 8x multiplier (on standard com port speeds), and
they have 1024-byte FIFOs.

Of course, if you're buying hardware, you'd probably be better off just
buying a couple cheap ethernet cards.

> -----Original Message-----
> From:	Mark Sawle [SMTP:mls26@cam.ac.uk]
> Sent:	Tuesday, February 17, 1998 11:47 AM
> To:	port-i386@NetBSD.ORG
> Subject:	PPP Speeds
> 
> I'd like to use PPP at 460,800 bps across a null modem cable to
> another
> machine, but pppd won't allow me to choose this speed and gives me a
> "tcsetattr: Invalid argument" error message when I try anything above
> 115,200.
> 
> I'd like to know what it is that is imposing this limit.  Is this a
> limitation of my hardware, its driver, pppd, or do I just need to
> reconfigure something to allow operation at these speeds?
> 
> I'm using NetBSD 1.3 with the GENERIC kernel.  The system is a few
> months
> old Pentium II machine, and as such I assumed, but know of no way to
> verify, that the serial ports would be capable of more than the one in
> my
> four year old system, which can go up to 115,200 bps.  The kernel
> identifies my port as a ns16550a if this is any help.
> 
> -- 
> Mark Sawle                    mls26@cam.ac.uk
> Robinson College, Cambridge   mlsawle@locutus.demon.co.uk