From:	Robert Billing <unclebob AT tnglwood DOT demon DOT co DOT uk>
Newsgroups:	comp.os.msdos.djgpp,comp.os.cpm,alt.folklore.computers
Subject:	Re: EOF char. (Was C++ and RHIDE)
Date:	Mon, 06 Jul 1998 22:18:00 +0100
Organization:	Tanglewood
Message-ID:	<35A13F08.23950102@tnglwood.demon.co.uk>
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Alan Bowler wrote:

> to start the paper tape reader going, and the reader would stop
> when it read the next X-OFF.  Alternately, the machine use a timeout
> mechanism to decide when there was no more paper tape.

 The timeout on no tape I don't remember, the ASR33 simply had a plastic
peg that popped up and killed the reader at end of tape. OTOH the CTRL/S
(XOF) trick I do, but remember it read *one* *more* character after the
XOF, a property for which we found many ingenious uses. The commonest
use of this was to punch XOF CR (or XOF ESC for ICL) so that the
character which caused the computer to accept the typed line was sent.
If you could induce it to send XON after each prompt (many systems did)
you had flow control.

-- 
I am Robert Billing, Christian, inventor, traveller, cook and animal
lover, I live near 0:46W 51:22N.  http://www.tnglwood.demon.co.uk/
"Bother," said Pooh, "Eeyore, ready two photon torpedoes and lock
phasers on the Heffalump, Piglet, meet me in transporter room three"

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