Compucolor character set
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'''Compucolor''' was a late-1970s computer manufacturer whose most popular model was the Compucolor II, released in 1978. They had an earlier model, variously known as the Compucolor 8001 or Compucolor I, in 1976, and before that the Intecolor 8001 intelligent terminal. | '''Compucolor''' was a late-1970s computer manufacturer whose most popular model was the Compucolor II, released in 1978. They had an earlier model, variously known as the Compucolor 8001 or Compucolor I, in 1976, and before that the Intecolor 8001 intelligent terminal. | ||
| − | The Compucolor computers and terminals used a slightly quirky character set based on [[ASCII]], which contained only uppercase letters and most of the punctuation and mathematical characters, but replaced the lowercase letters with graphic characters. The control characters also had graphical renditions, though you probably had to poke them directly into screen memory to see them, since those characters, when typed or sent in an input/output stream, were used as control codes. The control-code meanings differed considerably from the standard ASCII [[C0 controls]], with a few having more-or-less standard meanings (e.g., TAB, CR, LF, and BEL), but most having platform-specific meanings such as changing the color of text. Still more control functions were accessed by escape sequences consisting of the ESC character followed by another character. | + | The Compucolor computers and terminals used a slightly quirky character set based on [[ASCII]], which contained only uppercase letters and most of the punctuation and mathematical characters, but replaced the lowercase letters with graphic characters. The control characters also had graphical renditions, though you probably had to poke them directly into screen memory to see them, since those characters, when typed or sent in an input/output stream, were used as control codes. The control-code meanings differed considerably from the standard ASCII [[C0 controls]], with a few having more-or-less standard meanings (e.g., TAB, CR, LF, and BEL; though some of the references say that BEL, Ctrl-G, is not used even though it's noted on the "G" key on the keyboard), but most having platform-specific meanings such as changing the color of text. Still more control functions were accessed by escape sequences consisting of the ESC character followed by another character. |
Due to the way CR and LF were defined on the Compucolor, you needed both CR and LF to break a line. The way it's worded in the manual, it appears they expect those characters to be output in the order LF+CR, which is backward from the more common CR+LF line break. | Due to the way CR and LF were defined on the Compucolor, you needed both CR and LF to break a line. The way it's worded in the manual, it appears they expect those characters to be output in the order LF+CR, which is backward from the more common CR+LF line break. | ||
Revision as of 15:08, 25 December 2012
Compucolor was a late-1970s computer manufacturer whose most popular model was the Compucolor II, released in 1978. They had an earlier model, variously known as the Compucolor 8001 or Compucolor I, in 1976, and before that the Intecolor 8001 intelligent terminal.
The Compucolor computers and terminals used a slightly quirky character set based on ASCII, which contained only uppercase letters and most of the punctuation and mathematical characters, but replaced the lowercase letters with graphic characters. The control characters also had graphical renditions, though you probably had to poke them directly into screen memory to see them, since those characters, when typed or sent in an input/output stream, were used as control codes. The control-code meanings differed considerably from the standard ASCII C0 controls, with a few having more-or-less standard meanings (e.g., TAB, CR, LF, and BEL; though some of the references say that BEL, Ctrl-G, is not used even though it's noted on the "G" key on the keyboard), but most having platform-specific meanings such as changing the color of text. Still more control functions were accessed by escape sequences consisting of the ESC character followed by another character.
Due to the way CR and LF were defined on the Compucolor, you needed both CR and LF to break a line. The way it's worded in the manual, it appears they expect those characters to be output in the order LF+CR, which is backward from the more common CR+LF line break.
Documentation
- Compucolor II manual; has character set chart and description of control and escape codes
- More Compucolor info
