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Aucb.832 fa.editor-p utcsrgv!utzoo!decvax!ucbvax!C70:editor-people Fri Apr 2 23:21:02 1982 line-at-a-time I/O >From GZ@MIT-MC Fri Apr 2 23:17:45 1982 IBM's Edgar and XEDIT et.al. are not line-at-a-time, they are screen-at-a-time. That's partly what gives them the "feel" of being full-screen editors -- you move the cursor all around the screen, making your changes, and once in a while press ENTER to have the computer update its image of what you're doing or to enter some more complicated commands which your terminal cannot handle locally. The whole screen image, including cursor position, gets transmitted to the host. I've used them quite a bit, and they are very good given the limitations of half-duplex communication. But you'd have a hard time doing something like that with just run of the mill ascii terminals doing line-at-a-time I/O. DEC's TV is probably closer to the sort of thing you can do. Basically just a line editor (TECO) which displays a screen's worth of context at all times.

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