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I've just moved a rather large chunk of ASCII-specific details out of the introduction and into the ASCII section, and I'm now wondering whether I should simply have deleted it as it's largely duplicating what's written in the C0 and C1 control codes article. I've also added an "about" header, but somehow I doubt this will be sufficient to prevent future accretion of ASCII-specific details, as by far the majority of people looking for "Control Code" or "Control Character" will be looking for the specifics of ASCII. Perhaps we should re-arrange the articles:
Martin Kealey ( talk) 04:05, 9 August 2022 (UTC)
Control characters are non-printable characters but is the reverse true? Historically control characters were the first 32 ASCII characters, back when teletypes were all upper case, IIRC. (Or did we just always lock the shift key down? I don't think so.) Then characters like DEL came along that could not be generated with the control key, not to mention modern unicode characters like Zero-Width Non-Joiner. (For the record I don't recall if the old teletypes all had a control key.) Although these new characters cannot be made by using the control key, they certainly control the receiving device. Certainly in common usage all the non-printing ASCII characters are control characters. I can't say about the newer unicode characters. -- Kop 18:59, 29 Aug 2004 (UTC)
this somehow duplicates stuff from ASCII code#ASCII control characters, but I miss here the "sucker^H^H^H^H^H^H customer" example. — MFH: Talk 00:23, 25 May 2005 (UTC)
I think the examples at the beginning (SYN, ) are not very representative, LF, CR, TAB, NUL would be much more common. B.t.w., NUL would deserve a further study. — MFH: Talk 14:20, 13 March 2006 (UTC)
Is its escape sequence \g or \a ? If I remember correctly, despite the key combination being Ctrl+G, the escape sequence itself is \a (alert)... Medinoc ( talk) 08:46, 10 September 2008 (UTC)
I've snipped a statement that the ANSI X.64 standard is based on the VT100 terminal - it is the other way around. The VT100 manual is up online at http://vt100.net/docs/vt100-ug/ which clearly states this. I also removed the year of the standard because this reference gives the date as 1977 not 1979. I'm not sure if 1979 was plain wrong or if there was a revised version. CrispMuncher ( talk) 19:32, 15 September 2008 (UTC)
This is not the right place, but how to write a caret notation in italic. — Preceding unsigned comment added by 2A02:8422:1191:6E00:56E6:FCFF:FEDB:2BBA ( talk) 20:17, 27 February 2013 (UTC)
I have removed the link to a dab page not sure of the reason it was re added. Mo ainm ~Talk 15:04, 3 October 2013 (UTC)
Base58 Rafiq34 ( talk) 11:41, 20 September 2019 (UTC)
Base58 Rafiq34 ( talk) 11:41, 20 September 2019 (UTC)
http://kikaku.itscj.ipsj.or.jp/ISO-IR/001.pdf
dns error — Preceding unsigned comment added by 2003:E8:23D6:CBC1:C81A:2992:3136:F6E7 ( talk) 19:39, 23 July 2017 (UTC)
There are several issues with the current organization of the article:
I propose that the article be restructured into generic descriptions, with anchors, of all of the control characters and tables for at least ASCII, Baudot, EBCDIC and Unicode encoding. -- Shmuel (Seymour J.) Metz Username:Chatul ( talk) 18:42, 13 August 2021 (UTC)
DLE was normally used to indicate that the following character is a payload character and not to be interpreted as a control, which is the opposite of the description given.
The usual convention was that a control byte in the payload would have bit 6 inverted and be prefaced by DLE, for example, DLE in the payload would become DLE 'P' in the transmission. This is easily and unambiguously reversed upon reception, and avoids other control bytes being inadvertently included in the transmitted message.
Sadly this wasn't universally understood, and many manufacturers failed to note the significance of "invert bit 6", and a few did indeed create equipment that required the DLE STX sequence at the start of a packet.
I would like the purpose of DLE to be clarified, and the varied implementations highlighted. Martin Kealey ( talk) 01:49, 16 April 2022 (UTC)
Should the article mention FIGS and LTRS in the 5-bit Baudot code? Shmuel (Seymour J.) Metz Username:Chatul ( talk) 13:42, 1 November 2022 (UTC)
Control characters have been used for their side effects, e.g., rattling the print element on an IBM 2741. Would a section on such uses be TMI? -- Shmuel (Seymour J.) Metz Username:Chatul ( talk) 22:45, 15 January 2024 (UTC)
![]() | This article is rated C-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||||||||
|
I've just moved a rather large chunk of ASCII-specific details out of the introduction and into the ASCII section, and I'm now wondering whether I should simply have deleted it as it's largely duplicating what's written in the C0 and C1 control codes article. I've also added an "about" header, but somehow I doubt this will be sufficient to prevent future accretion of ASCII-specific details, as by far the majority of people looking for "Control Code" or "Control Character" will be looking for the specifics of ASCII. Perhaps we should re-arrange the articles:
Martin Kealey ( talk) 04:05, 9 August 2022 (UTC)
Control characters are non-printable characters but is the reverse true? Historically control characters were the first 32 ASCII characters, back when teletypes were all upper case, IIRC. (Or did we just always lock the shift key down? I don't think so.) Then characters like DEL came along that could not be generated with the control key, not to mention modern unicode characters like Zero-Width Non-Joiner. (For the record I don't recall if the old teletypes all had a control key.) Although these new characters cannot be made by using the control key, they certainly control the receiving device. Certainly in common usage all the non-printing ASCII characters are control characters. I can't say about the newer unicode characters. -- Kop 18:59, 29 Aug 2004 (UTC)
this somehow duplicates stuff from ASCII code#ASCII control characters, but I miss here the "sucker^H^H^H^H^H^H customer" example. — MFH: Talk 00:23, 25 May 2005 (UTC)
I think the examples at the beginning (SYN, ) are not very representative, LF, CR, TAB, NUL would be much more common. B.t.w., NUL would deserve a further study. — MFH: Talk 14:20, 13 March 2006 (UTC)
Is its escape sequence \g or \a ? If I remember correctly, despite the key combination being Ctrl+G, the escape sequence itself is \a (alert)... Medinoc ( talk) 08:46, 10 September 2008 (UTC)
I've snipped a statement that the ANSI X.64 standard is based on the VT100 terminal - it is the other way around. The VT100 manual is up online at http://vt100.net/docs/vt100-ug/ which clearly states this. I also removed the year of the standard because this reference gives the date as 1977 not 1979. I'm not sure if 1979 was plain wrong or if there was a revised version. CrispMuncher ( talk) 19:32, 15 September 2008 (UTC)
This is not the right place, but how to write a caret notation in italic. — Preceding unsigned comment added by 2A02:8422:1191:6E00:56E6:FCFF:FEDB:2BBA ( talk) 20:17, 27 February 2013 (UTC)
I have removed the link to a dab page not sure of the reason it was re added. Mo ainm ~Talk 15:04, 3 October 2013 (UTC)
Base58 Rafiq34 ( talk) 11:41, 20 September 2019 (UTC)
Base58 Rafiq34 ( talk) 11:41, 20 September 2019 (UTC)
http://kikaku.itscj.ipsj.or.jp/ISO-IR/001.pdf
dns error — Preceding unsigned comment added by 2003:E8:23D6:CBC1:C81A:2992:3136:F6E7 ( talk) 19:39, 23 July 2017 (UTC)
There are several issues with the current organization of the article:
I propose that the article be restructured into generic descriptions, with anchors, of all of the control characters and tables for at least ASCII, Baudot, EBCDIC and Unicode encoding. -- Shmuel (Seymour J.) Metz Username:Chatul ( talk) 18:42, 13 August 2021 (UTC)
DLE was normally used to indicate that the following character is a payload character and not to be interpreted as a control, which is the opposite of the description given.
The usual convention was that a control byte in the payload would have bit 6 inverted and be prefaced by DLE, for example, DLE in the payload would become DLE 'P' in the transmission. This is easily and unambiguously reversed upon reception, and avoids other control bytes being inadvertently included in the transmitted message.
Sadly this wasn't universally understood, and many manufacturers failed to note the significance of "invert bit 6", and a few did indeed create equipment that required the DLE STX sequence at the start of a packet.
I would like the purpose of DLE to be clarified, and the varied implementations highlighted. Martin Kealey ( talk) 01:49, 16 April 2022 (UTC)
Should the article mention FIGS and LTRS in the 5-bit Baudot code? Shmuel (Seymour J.) Metz Username:Chatul ( talk) 13:42, 1 November 2022 (UTC)
Control characters have been used for their side effects, e.g., rattling the print element on an IBM 2741. Would a section on such uses be TMI? -- Shmuel (Seymour J.) Metz Username:Chatul ( talk) 22:45, 15 January 2024 (UTC)