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Path: utzoo!utgpu!watmath!uunet!cs.utexas.edu!rutgers!apple!bloom-beacon!bu-cs!att!icus!lenny
From: lenny@icus.islp.ny.us (Lenny Tropiano)
Newsgroups: unix-pc.general,unix-pc.uucp
Subject: Re: Hardware flow control on tty000?
Summary: Enabling HFC on any tty port.
Keywords: HFC, xon-xoff, stty -ixon
Message-ID: <659@icus.islp.ny.us>
Date: 6 Apr 89 18:09:13 GMT
References: <1298@naucse.UUCP>
Reply-To: lenny@icus.islp.ny.us (Lenny Tropiano)
Distribution: unix-pc
Organization: ICUS Software Systems, Islip, New York
Lines: 50

In article <1298@naucse.UUCP> sbw@naucse.UUCP (Steve Wampler) writes:
...
|>
|>I do, however, have a question.  Numerous people suggested I set
|>hardware flow control on the port (tty000) and gave TB+ settings for
|>that (i.e. s58=002).  How?  I don't see how to set a CTS flow control
|>protocol on that port (it doesn't show up as option during 'Hardware
|>Setup' on my system, and stty doesn't eat the 'ctscd' flag).  So
|>I'm running with Xon/Xoff protocol (and s58=003).  I'd prefer the other,
|>if someone can tell me how.  Remember that I have 3.5, not 3.51.
|>Thanks!
|>
Gee, I can't remember, but I don't think HFC appeared on the UNIX pc before
3.51 releases.  Therefore if you don't have /etc/hfc_ctl, you don't have
the capability of doing HFC.  (Sorry).  stty ctscd isn't valid for the UNIX pc.

For those running 3.51 (and of course if hfc_ctl appears in 3.5):

To set up HFC on any tty00[0-7] port you can do the following.

Place a file in /etc/daemons called: /etc/daemons/hfc_init
In the file put:

/etc/hfc_ctl +/dev/tty00x  (where x is replaced with 0 through 7)

You can put multiple lines as this is a shell script that will turn on HFC
for the port specified.    Note:  /etc/hfc_ctl +DEVICE turns on HFC,
whereas, /etc/hfc_ctl -DEVICE turns off HFC.

Also set up the gettydefs file so that the lines settings doesn't have IXON
for that port.   One question I have for those running HFC, how do you
stop the output manually?  Since ^S/^Q is turned off, how do I stop 19200
baud from "Blazing" past my screen :-)?

|>By the way, I don't use cu or async_main, just uucp and kermit, so I
|>locked the interface at 19200 baud - seems to cause no problems.
|>Maybe someone (good, not like me) can figure out how to patch cu
|>and async_main to take 19200?
|>

I doubt sincerely that the async_main (terminal emulator) can really handle
anything over 9600.  It kinda slow.  I know I have problems with 
machine<->machine connections at 9600 (ie. dropped characters).

-Lenny
-- 
Lenny Tropiano             ICUS Software Systems         [w] +1 (516) 582-5525
lenny@icus.islp.ny.us      Telex; 154232428 ICUS         [h] +1 (516) 968-8576
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