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1/ Some Background Information
There are two principal ways in which all colors are produced.
The first involves mixing light rays. In this system-commonly
known as the "RGB"
method- Red, Green, and Blue light rays are projected on a surface (such as a theater
screen or a color monitor) to generate all other colors.
The second method-and
you'll probably remember this from your junior high
school art class-is based on the mixture of pigments such as ink or paint. In this
method, the colors Yell ow, Magenta, and Cyan are mixed in different combinations
to produce all other colors. This is called the "subtractive" system, although it is most
often known as the "YMC" method.
The CGP-220 uses the "YMC" method. Color monitors, on the other hand, use
light rays to create color, and, therefore, use the "RGB" method.
It is possible, however, to print graphic displays from a color monitor because the
CGP-220 is equipped with built-in software that allows conversion from the "RGB"
method to the "YMC" method. This means, simply, that you can use a Color
Computer to produce a graphic color display and then "dump" the picture to the
CGP-220 for printing.
Of course, you can manipulate colors directly in the Bit Image or the Color-Scan
Mode from a BASIC program. Color Screen Dumping is just an extra convenience
that makes your CGP-220 more useful and a valuable addition to any computer
system.
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