Path: utzoo!utgpu!watmath!uunet!tut.cis.ohio-state.edu!MITVMA.MIT.EDU!LUSGR%LEHICDC1.BITNET
From: LUSGR%LEHICDC1.BITNET@MITVMA.MIT.EDU (Steve Roseman)
Newsgroups: gnu.emacs
Subject: Re:  Flow Control on DECServer 200s
Message-ID: <8812141421.AA10343@prep.ai.mit.edu>
Date: 14 Dec 88 14:10:00 GMT
Sender: daemon@tut.cis.ohio-state.edu
Distribution: gnu
Organization: GNUs Not Usenet
Lines: 32

>I'm running GNU Emacs 18.52.2 under VAX/VMS 4.7 on one of several vaxen
>connected through a terminal server (DECServer 200).  When emacs starts up
>or restarts after being suspended, the terminal server is put in pasthru
>mode, but flow control is not disabled.  I can disable flow control
>(XON/XOFF) on the server manually, but this is undesirable due to the need
>to turn it back on later.
>...
>My question is who knows what sort of magic is used to get the server to
>switch to pasthru mode --- does it do this by sensing the terminal's
>condition?  Is there a way to disable flow control _on_the_server_ by an
>appropriate termcap entry?

>Roland Roberts                        BITNET: roberts@uornsrl.bitnet
>  Nuclear Structure Research Lab    INTERNET: rbr4@db2.cc.rochester.edu
>  271 East River Road                   UUCP: rochester!ur-cc!rbr4
>  Rochester, NY  14267                  AT&T: (716) 275-8962

    If anyone knows how, I would like to hear.  However, I don't think it
is possible.  The LAT/VMS V4.7 manual states (pg 4-1)  "Flow control to the
physical device is handled by the terminal server instead of the host.  A
seperate flow control mechanism exists between the server and host.  The
following terminal characteristics do not apply to LAT terminals:
    TT$M_READSYNCH
    TT$M_TTSYNCH"

    We leave flow control disabled on the servers (in order to use Emacs),
and the user must manually enable it whenever data overflow problems occur.
Yes, that's a hassle.

Steve Roseman
Lehigh University Computing Center
LUSGR@LEHICDC1.BITNET