Questions tagged [control-characters]

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8 votes
2 answers
225 views

Did any system ever use the Privacy Message (PM) C1 control?

ECMA-48 (Fifth Edition, 1991) section 8.3.94 (page 53, PDF page 67) defines "PM - PRIVACY MESSAGE" as: PM is used as the opening delimiter of a control string for privacy message use. The ...
Simon Kissane's user avatar
3 votes
3 answers
441 views

How did control characters work in real teletypes?

Emulated terminals can accept control characters, being able to move the position of cursor, to delete a char or a word or even to clear all screen, change foreground and background colors, etc. ...
Daniel Bandeira's user avatar
27 votes
3 answers
7k views

What was the ASCII end of medium (EM) character intended to be used for?

I can find information about how characters were used to structure transmissions in general, and I can find information about transmission characters which are still commonly used today, though ...
Ryan1729's user avatar
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36 votes
4 answers
12k views

History of Ctrl-S and Ctrl-Q for flow control

Which OS was the first to use Ctrl-S and Ctrl-Q on the console for pause and continue? I first discovered Ctrl-S in IBM PC DOS 1.1.
Old Geezer's user avatar
7 votes
2 answers
614 views

What file systems / encapsulation formats used ASCII control characters?

Most of the ASCII character codes make sense in the context of data transmission, e.g. ␄, ␗, ␖ (end of transmission, end of transmission block, synchronisation). However, there are also codes such as ␜...
wizzwizz4's user avatar
  • 18.4k