From: "Pascal J. Bourguignon" <pjb@informatimago.com>
To: help-gnu-emacs@gnu.org
Subject: Re: Replace with CR
Date: Mon, 06 Jul 2015 12:34:38 +0200 [thread overview]
Message-ID: <87zj39shfl.fsf@kuiper.lan.informatimago.com> (raw)
In-Reply-To: mailman.6423.1436172566.904.help-gnu-emacs@gnu.org
"Gian Uberto Lauri" <saint@eng.it> writes:
> Stefan Monnier writes:
> > > Again, there's no such thing as ENTER. The key is RETURN.
> >
> > FWIW, my keyboard (US thinkpad) has no "RETURN", but it does have a key
> > labelled "Enter".
>
> I have "Return" on my old VIC20, but I doubt Emacs will be ever ported
> there...
>
> "Return" was a tty-derivative labeling and was once common, even when
> it sent a LF o CR/LF[1] pair.
NO. THE "RETURN" KEY NEVER EVER SENT A LINE-FEED CODE! Not even in CR-LF
pair. It only sent a CARRIAGE RETURN code.
It is the system that echoed this carriage return along with a line feed
(or just a line feed when local echo was activated). And in the case of
unix, it is the keyboard driver that translates the CARRIAGE RETURN code
it reads into a LINE FEED in the buffer (and even, only according to the
tty configuration). In linux, check n_tty_receive_char and
do_output_char in drivers/tty/n_tty.c
> Enter is much common now and closer to
> semantic the keys has today for most computer users. Enough common to
> build jokes on, see the two strips I posted.
>
> [1] for those who still do not know it: the pair is CR/LF and not
> LF/CR because on old TTY the carriage return was a longer operation
> that could be controlled without keeping the tty controller busy: you
> could start the head carriage, and while the it was going home move
> the paper drum one line.
--
__Pascal Bourguignon__ http://www.informatimago.com/
“The factory of the future will have only two employees, a man and a
dog. The man will be there to feed the dog. The dog will be there to
keep the man from touching the equipment.” -- Carl Bass CEO Autodesk
prev parent reply other threads:[~2015-07-06 10:34 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-05 14:40 Replace with CR Andrea Venturoli
2015-07-05 15:22 ` tomas
2015-07-05 15:24 ` Pascal J. Bourguignon
2015-07-05 15:47 ` Óscar Fuentes
2015-07-06 8:41 ` Gian Uberto Lauri
[not found] ` <mailman.6422.1436172122.904.help-gnu-emacs@gnu.org>
2015-07-06 10:18 ` Pascal J. Bourguignon
2015-07-05 15:55 ` tomas
2015-07-05 17:03 ` Ian Zimmerman
[not found] ` <mailman.6379.1436115793.904.help-gnu-emacs@gnu.org>
2015-07-05 17:34 ` Pascal J. Bourguignon
2015-07-05 19:25 ` Barry Margolin
2015-07-05 20:01 ` Óscar Fuentes
2015-07-05 20:47 ` Pascal J. Bourguignon
2015-07-05 22:59 ` Richard Wordingham
2015-07-06 13:51 ` Barry Fishman
2015-07-06 16:04 ` Stefan Monnier
[not found] ` <mailman.6368.1436111238.904.help-gnu-emacs@gnu.org>
2015-07-06 9:49 ` Andrea Venturoli
2015-07-06 14:37 ` Barry Margolin
2015-07-06 15:33 ` Andrea Venturoli
2015-07-07 0:29 ` Robert Thorpe
[not found] ` <mailman.6367.1436109760.904.help-gnu-emacs@gnu.org>
2015-07-05 15:36 ` Pascal J. Bourguignon
2015-07-05 16:30 ` Stefan Monnier
2015-07-05 16:39 ` Paul Smith
2015-07-06 8:49 ` Gian Uberto Lauri
[not found] ` <mailman.6423.1436172566.904.help-gnu-emacs@gnu.org>
2015-07-06 10:34 ` Pascal J. Bourguignon [this message]
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