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Date: Wed, 10 Jan 1996 23:05:44 +1100
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199601101205.XAA13329@godzilla.zeta.org.au>
To: freebsd-hackers@FreeBSD.org, roberto@hsc.fr.net
Subject: Re: HELP: Cyclades Drivers
Sender: owner-hackers@FreeBSD.org
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>Does anybody has an idea (Briand ? Bruce ?) ?

I replied in private mail a few days ago.

>------- start of forwarded message -------
>From: deva@dystopia.fi (Henrikki Karapuu)
>Newsgroups: comp.unix.bsd.freebsd.misc
>Subject: HELP: Cyclades Drivers
>Date: 6 Jan 1996 22:03:57 GMT

>We have been using Brian Litzinger's cyclades driver for few months
>now, since drivers suplied with kernel were not even able to probe
>cyclades. About week ago we noticed that transfer rate when uploading
>was way too low, around 1000cps on V34. We have now pinpointed problem
>to cyclades drivers; same modem with same settings in same machine but
>in normal 16550AFN uart serial-card gives normal transfer rates of
>3000cps when uploading.

This may be because RTS input flow control is broken.  (The hardware
flow control provided by the cd1400 serial chip can't work in general
because the sender may not respond to it in time.  E.g., it won't
work (unless it isn't really necessary) for a 16550A sending to a
cd1400.)

>Next I experiemented with different kernel and driver versions as follows:

>Kernel 2.0.5R, with drivers from packet cyb2.0fb.shar.gz or cyb2.0-32fb.tar.gz:
>...
>Kernel 2.1.0R with drivers from packet cyb2.0fb.shar.gz:
>...
>Kernel 2.1.0R with drivers from packet cyb2.0-32fb.tar.gz:
>...

Use 2.1 with standard drivers.

Bruce