Almost all modern editors use this approach. Instead of adopting E's approach of structuring the file for page-random access on disk, Stallman modified TECO to handle large buffers more efficiently and changed its file-management method to read, edit, and write the entire file as a single buffer. TECO was a page-sequential editor that was designed for editing paper tape on the PDP-1 at a time when computer memory was generally small due to cost, and it was a feature of TECO that allowed editing on only one page at a time sequentially in the order of the pages in the file. Į had another feature that TECO lacked: random-access editing. Stallman reimplemented this mode to run efficiently and then added a macro feature to the TECO display-editing mode that allowed the user to redefine any keystroke to run a TECO program. He returned to MIT where Carl Mikkelsen, a hacker at the AI Lab, had added to TECO a combined display/editing mode called Control-R that allowed the screen display to be updated each time the user entered a keystroke. He was impressed by the editor's intuitive WYSIWYG (What You See Is What You Get) behavior, which has since become the default behavior of most modern text editors. Richard Stallman visited the Stanford AI Lab in 1976 and saw the lab's E editor, written by Fred Wright. (A similar technique was used to allow overtyping.) This behavior is similar to that of the program ed.
One could not place characters directly into a document by typing them into TECO, but would instead enter a character ('i') in the TECO command language telling it to switch to input mode, enter the required characters, during which time the edited text was not displayed on the screen, and finally enter a character () to switch the editor back to command mode. Unlike most modern text editors, TECO used separate modes in which the user would either add text, edit existing text, or display the document. Įmacs development began during the 1970s at the MIT AI Lab, whose PDP-6 and PDP-10 computers used the Incompatible Timesharing System (ITS) operating system that featured a default line editor known as Tape Editor and Corrector (TECO). Moon Emacs' interface was influenced by the design of the space-cadet keyboard, which sought to enable users to type as many different kinds of input as possible. as a project to unify the many divergent TECO command sets and key bindings at MIT David A.
#Magit for aquamacs free
Emacs is among the oldest free and open source projects still under development. XEmacs development is inactive.Įmacs is, along with vi, one of the two main contenders in the traditional editor wars of Unix culture. GNU Emacs and XEmacs use similar Lisp dialects and are, for the most part, compatible with each other. XEmacs is a variant that branched from GNU Emacs in 1991. The most popular, and most ported, version of Emacs is GNU Emacs, which was created by Richard Stallman for the GNU Project. It was inspired by the ideas of the TECO-macro editors TECMAC and TMACS.
as a set of Editor MACroS for the TECO editor. The original EMACS was written in 1976 by David A. Extensions have been written to, among other things, manage files, remote access, e-mail, outlines, multimedia, git integration, and RSS feeds, as well as implementations of ELIZA, Pong, Conway's Life, Snake, Dunnet, and Tetris. Implementations of Emacs typically feature a dialect of the Lisp programming language, allowing users and developers to write new commands and applications for the editor.
#Magit for aquamacs software
Various free/libre software developers, including volunteers and commercial developersĮmacs has over 10,000 built-in commands and its user interface allows the user to combine these commands into macros to automate work.
Org-mode, Magit, and Dired buffers in GNU Emacs
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