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000227_news@newsmaster….columbia.edu _Sat Nov 1 10:50:42 1997.msg
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Path: news.columbia.edu!panix!howland.erols.net!EU.net!sun4nl!sun4nl!echelon!kees
From: kees@echelon.nl (Kees Hendrikse)
Subject: Re: C-Kermit 6 binaries for SCO XENIX 2.3.4 w/hardware flow control
Organization: Echelon Consultancy, Enschede, The Netherlands
Date: Sat, 1 Nov 1997 15:16:43 GMT
Message-ID: <EIz3rv.B2F@echelon.nl>
References: <345A4955.5C44@tiac.net> <63fce1$3d9$1@apakabar.cc.columbia.edu>
Lines: 27
Xref: news.columbia.edu comp.protocols.kermit.misc:8007 comp.unix.sco.misc:54016
In <63fce1$3d9$1@apakabar.cc.columbia.edu> Frank da Cruz writes:
> In article <345A4955.5C44@tiac.net>, Compu-Craft <ccraft@tiac.net> wrote:
> : I am looking for C-Kermit 6 binaries for SCO XENIX which supports
> : hardware flow control (HWFC).
(..)
> Anyway, I might be mistaken, but I am fairly sure that C-Kermit for Xenix
> does not support hardware flow control because Xenix itself does not
> support it (hardware flow control is a fairly recent development in most
> UNIX platforms).
SCO Xenix -from 2.3.0 upward- does support rtsflow/ctsflow. However, it is
rts/cts flowcontrol in the classic sense (unidirectional): If both rtsflow
and ctsflow bits are enabled, Xenix asserts RTS when it wants to send data
and waits for CTS assertion before it actually starts sending data. You
most certainly want rts/cts control in the modern way, in which rts is used
to control data in one direction and cts is used for the other direction.
By the way, the Xenix rts/cts implementation was broken in 2.3.0 and 2.3.1.
--
Kees Hendrikse | email: kees@echelon.nl
|
ECHELON consultancy and software development | phone: +31 (0)53 48 36 585
PO Box 545, 7500AM Enschede, The Netherlands | fax: +31 (0)53 43 37 415