Atari 130XE User Manual

Run the program. A li ght green line goes across the top of the screen .
After
plotting a pi xe l, use the DRAWTO command to plot a second
pi xe l and draw a connecting line between th e two. Line 40 tells the
computer to
plot a pi xe l at co lu mn 39, row 0, and then connect them.
Now type
Th e command plots a pi xe l in the bottom right corner of the graphics
screen, just above the text window, and then draws a
line to connect
39,0 to 39,19. Now type
DRAHTO 0 .. 1.~
To complete the rectangle, type
DRAHTO 0 .. 0
Now type GR.O and li st the program. Add th ese lines:
50 DRAHTO 3~ .. 1.~
60 DRAHTO 0 .. 1.~
70 DRAHTO 0 .. 0
SETCOLOR and COLOR
When you run the program, the computer draws a green rectangle
aga in . To brighten up the screen, type
35 COLOR 1.
45 COLOR 2
55 COLOR 1.
65 COLOR 3
Run the program to see a rectangle of many colors.
To change the color in a register, use SETCOLOR. You might conclude
that CO LOR 1 se lects the color for register 1 and that CO LOR 2
se le cts the color for register 2. Unfortunately, that conc lu sion is not
quite true. Mode 3 has four registers and four
colors -but the
registers are numbered
0, 1, 2, and 4, and the colors are 'numbered 0,
1, 2, and 3. To keep th ings straight, make a chart:
Co lor 0
Register 4 Black
Color
1
Register
0 Orange
Co lor 2 Register 1 Light green
Co lor 3 Register 2 Dark b lu e
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Atari 130XE Specifications

General

Brand	Atari
Model	130XE
Category	Desktop
Language	English