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Re: [groff] 04/05: {g, n} Give assistance to pager users.

From: Tadziu Hoffmann
Subject: Re: [groff] 04/05: {g, n} Give assistance to pager users.
Date: Tue, 2 Jul 2019 23:49:13 +0200
User-agent: Mutt/1.11.4 (2019-03-13)

> > Some terminals, the Tek 401x series especially, could
> > be configured to tell the host to stop sending text on
> > a "page full" condition.  Some sent the proper RS-232
> > hardware signals, some sent <ctrl-s>/<ctrl-x>.

> Really? That's interesting. What did <ctrl-s> do? On the
> terminal emulators I have on hand at the moment, none of them
> are responding or behaving differently.

I remember these as <ctrl-s> and <ctrl-q> (ASCII DC1 and DC3).

Typing "stty -a" gives (among other stuff):

  start = ^Q; stop = ^S

and it works as intended (<ctrl-s> stops output to the terminal
and <ctrl-q> enables it again).

Wikipedia has a page on this:

Particularly irritating was emacs's use of <ctrl-s> for
"search" because it conflicted with this flow-control, meaning
that you had to either reconfigure your tty settings or the
emacs keybindings.  (Vi did not use <ctrl-s> or <ctrl-q>
and was therefore "safe".)

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