Bill Studenmund wrote:
> 
> On Fri, 28 Nov 1997, Harry wrote:
> 
> > Hi there!
> > 
> > I am having problems with zstty0: ring and fifo overruns.
> > 
> > This occured after setting up PPP on my SE/30. The connection speed is
> > 57600 and crtscts ist set in /etc/ppp/options. The cable is a hardware
> > handshaking I wired myself.
> > 
> > Its a REAL stock configuration otherwise: NetBSD 1.2.1 GENERIC#0 :-)
> > 
> > Are there any known problems with a speed of 57600 bps??
> 
> Yes. crtscts only does output-stopping flow control (the mac serial ports
> don't really have an RTS output).
> 
> What you want is cdtrcts, a new flow control mode, added to NetBSD
> recently. It's in 1.3. Also, ppp has been fixed to support cdtrcts. :-)
> 
> I've used ppp on my IIsi at 57600 w/ cdtrcts w/o any problems, though the
> machine was loaded heavily. w/o cdtrcts was unusable.

Bill, doesn't this require a specially wired cable?  Or will a normal
hardware-handshake cable work for this mode?

Also, can your modified stty support output speeds higher than 57600?

TIA.

-- 
Colin Wood                                 cwood@ichips.intel.com
Component Design Engineer - MD6                 Intel Corporation
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I speak only on my own behalf, not for my employer.