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JR-BASIC
Dialect of the BASIC programming language From Wikipedia, the free encyclopedia
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JR-BASIC is a dialect of the BASIC programming language running on the Matsushita JR series of microcomputers.[1]
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Although it's its own dialect, it was designed to be mostly compatible with Microsoft BASIC. Since it was developed for low-cost entry-level machines, it featured as few functions as possible, in order to save computer resources. Nevertheless, the interpreter was intended to be compact and efficient, with a feature-rich screen editor supporting direct execution of BASIC instructions.
Commands were input by keywords[2] - by pressing a combination of control and alphabet keys, a full command word would be entered. This was faster and more comfortable than typing words letter by letter, as the computer keyboard was poor (chiclet keyboard).
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JR-BASIC 1.0
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JR-BASIC 1.0 is the original version present on the JR-100 computer, released in 1981.[3]
Specifications
Keyboard commands
Key combinations allowed the user to enter commands and control the onscreen basic interpreter.[2]
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JR-BASIC 5.0
The JR-200 model, released in 1983,[4] came with JR-BASIC 5.0 that added extended functionally like graphical commands such as COLOR
, (which selected character color, background color and display mode) and PLOT
which permitted direct addressing of the low resolution graphics mode (64×48, using text semigraphics characters, which represented pixel blocks that used one-quarter of each character). Eight colors were available for the background and foreground use: blue, red, magenta, green, cyan, yellow, white and black. By re-programming a part of the character-set a limited high resolution graphics mode was achievable with a resolution of 256×192.
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See also
References
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