69 lines
2.5 KiB
Markdown
69 lines
2.5 KiB
Markdown
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TECOC - TECO Editor
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===================
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Teco is a text editor written by Dan Murphy in 1962. It differs from
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other editors in several ways as follows:
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1. Character oriented
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Vi and Emacs are screen oriented editors. You view the text on the whole
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window or screen, and you edit the text right where you see it. Changes take
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affect immediately.
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ed, ex, edlin are line oriented editors. Edited text is viewed,
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referenced, and edited by line.
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Teco is character oriented. This means the unit of reference is a
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single character. On one hand, this may make teco cumbersome to use,
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but on the other hand, it gives teco very fine control over what is
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happening.
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Teco does have a video mode, however text is still edited with
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commands on a character basis. The screen is simply updated once a
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command is completed to give the user a visual representation of where
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they are. Text is not edited in the screen view area.
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2. Macros
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In general, vi, ed, and edlin are not programmable. This means you
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have the functions the editor provides and that is all you can do.
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However, teco is highly programmable. Programs that you write are
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called macros. In fact, the original version of Emacs was written as
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teco macros. Also, "emacs" actually means "Editing Macros".
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The original versions of Teco were written in the machine languages of
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the machines it operated on. As newer machines and editor arose, teco
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fell into increasing disuse and obscurity.
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In the early '80's Pete Siemsen, a long-time teco user, created a
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portable version of Teco in the C language called "tecoc". Rather
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than create a new editor, Pete's goal was to duplicate the original teco
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as closely as possible.
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As time wore on, Tom Almy, Blake McBride, and others increasingly
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assisted in tecoc's maintenance (porting, bug fixes, etc.).
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Eventually, tecoc found a new home and principal support at Tom
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Almy's home page where Tom kept up with ports to Windows, Mac, and
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Linux.
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Most recently, Blake McBride:
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1. Merged Tom Almy's various ports along with work done by Blake
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2. renewed the Windows, Mac, and Linux ports
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3. re-enabled video support (on Mac & Linux)
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4. bug fixes and speed improvements
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5. tested on 64 bit machines
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This latest work is available on github at:
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https://github.com/blakemcbride/Tecoc
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Other documents in the "doc" directory provide complete documentation.
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See the following files in the "doc" directory:
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BUILD.txt Build and setup instructions
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INTRO.txt Introduction to using the tecoc
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teco-manual.txt Complete manual
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