Atari 130XE User Manual

Type GR .O, list the program, and change COLOR 2 in line 20 to
COLOR 1. COLOR 1 se lects register 0, and orange is the default color
for register O. To cha ng e the color in register 0, use the SETCOLOR
command. Add th e following lin e:
1.5 SETCOLOR 0 .. 4 .. 6
When you run the program, the orange lines change to a pinkish color.
You have changed the color of the lines by using SETCOLOR to
change the paint in the bucket (the color in the register), not by using
COLOR to choo se a different bucket (register). The color luminance of
register 0 also affects the luminance of the text in the text window.
Now add
42 SETCOLOR 1. .. 2 .. 8
The light green at the right side of the box turns gold. Add one more
line:
62 SETCOLOR 2 .. 1.1. .. 4
Run the program. Not only does the left side of the box change to
green, but the
te xt window also turns green. Therefore, register 2 also
controls the color of the text window.
Now you
should be able to use SETCOLOR and COLOR to achieve a
wide variety of colors and hues in your programs.
Graphics Modes 5 and 7
The differences among modes 3, 5, and 7 can be illustrated very
easily. Change line 10 to
1.0 GRAPHICS 5
Run the program. The rectangle is much smaller because the pi xels
are smaller. With the text window, the mode 3 grid has 40 columns
and 20 rows. The mode 5 grid ha s 80 columns and 40 rows.
Now change
line 10 to
1.0 GRAPHICS 7
When you run the program, an even smaller rectangle appears. The
grid in mode 7 is 160 columns by 80 rows.
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Atari 130XE Specifications

General

Brand	Atari
Model	130XE
Category	Desktop
Language	English