Radio Shack TRS-80

computer Graphics operation Manual
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1/ Computer Graphics Overview
Graphics is the presentation of dimensional artwork. With
TRS-8~ Computer Graphics, the artwork is displayed on a
two-dimensional plane -- your computer screen. Like an
artist's easel or a teacher's blackboard, the screen is a
"drawing board" for your displays.
TRS-8~ Computer Graphics has two colors:
Black (OFF)
White (ON)
Graphics programming is different from other types of
programming because your ultimate result is a pictorial
display (bar graph, pie chart, etc.) rather than textual
display "(sum, equation, etc.). This is an important
distinction. After working with graphics for a while, you'll
find yourself thinking "visually" as you write programs.
In computer-generated graphics, displays can include tables,
charts, graphs, illustrations and other types of artwork.
Once they're created, you can "paint" displays with a
variety of styles and shapes, or even simulate animation.
The Computer Graphics program uses a "high-resolution"
screen. The more addressable points or dots (called
"pixels") on a computer's screen, the higher the resolution.
A lower resolution screen has fewer addressable pixels.
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