24 Mar
2016
24 Mar
'16
4:32 p.m.
George Ross scripsit:
And don't forget that carriage-return takes
longer than printing individual
characters, so you need to send CR LF to give it time to get back to the
first column while it's feeding a line. Or CR CR LF just in case.
It's true that CR takes longer, but you have to send both CR and LF because
CR only returns the carriage whereas LF only feeds lines. Skipping to the
bottom of a page was done by sending pure LFs, whereas underlining was
achieved (though the 33 had backarrow rather than underscore) by sending
a line of text followed by CR followed by a line of spaces and underscores.
Later, when it was observed that this made the text illegible on glass TTYs,
the order was reversed: spaces and underscores, then CR, then text.
(Or was that the Olivetti terminal? Or the DECwriter?
One of those
mechanical things anyway.)
It may have been the Olivetti.
--
John Cowan http://www.ccil.org/~cowan cowan(a)ccil.org
Consider the matter of Analytic Philosophy. Dennett and Bennett are well-known.
Dennett rarely or never cites Bennett, so Bennett rarely or never cites Dennett.
There is also one Dummett. By their works shall ye know them. However, just as
no trinities have fourth persons (Zeppo Marx notwithstanding), Bummett is hardly
known by his works. Indeed, Bummett does not exist. It is part of the function
of this and other e-mail messages, therefore, to do what they can to create him.