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.

Take care,

Bill