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000066_news@columbia.edu_Fri Dec 8 22:56:54 1995.msg
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(5.65c+CU/IDA-1.4.4/HLK for <kermit.misc@watsun>); Fri, 8 Dec 1995 17:57:03 -0500
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From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: Hardware flow control
Date: 8 Dec 1995 22:56:54 GMT
Organization: Columbia University
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References: <4a7ond$cf9@ddi2.digital.net>
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In article <4a7ond$cf9@ddi2.digital.net>, <rripley@digital.net> wrote:
: I'm using C-Kermit on a Silicon Graphics Indigo2. Does anyone know how
: to get hardware flow control (RTS/CTS) turned on? Kermit won't let me
: set it and the man page just says that RTS/CTS can be selected if the
: computer and its operating system support it (and mine does). But there
: is no SET FLOW RTS/CTS option in my Kermit.
:
I verified the following:
At least as of IRIX 5.2, there is no API for RTS/CTS, so you can't SET
FLOW RTS/CTS in the IRIX version of Kermit (maybe in IRIX 6.0 the
situation is different, but I have no way of knowing).
Instead, tell C-Kermit to "set line /dev/ttyf00" or whatever the port
number is. The "f" signifies a device driver that uses RTS/CTS flow
control.
But then, according to "man serial", you still need serial port hardware
that can support this. Evidently, SGI computers have all sorts of bizarre
Macintosh-like serial ports that don't support the full range of EIA
RS-232 (V.24) signals needed for asynchronous modem communication. So if
the port doesn't have RTS and CTS wires, then the hardware flow control
driver isn't going to have much to work with...
- Frank