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''device number'' indicates a device. By default, device 0 (screen and keyboard) is assumed. In Color BASIC, device #-1 (cassette) and #-2 (printer) are available to the programmer.
==Edit mode==
If you make a mistake typing in a line, you can either retype it from scratch (or DEL it).. or you can EDIT it.
When in EDIT mode, you get a reprint of the line, and a second copy that you SPACEbar across chars. You cannot use arrow keys. backspace takes you left, but does not actually erase it in the buffer. 'i' puts you in insert mode. pressing return gets you out of it. 'c' changes one char, 'd' deletes one char.
'x' takes you to end of line, allowing you to e'x'tend it. 'l' redraws the line.
==Functions==
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