Atari 800 Basic Reference Manual

LIGHT SHOW
H-8 Appendix
This program demonstrates another aspect of Atari graphics. It uses graphics
mode 7 for high resolution and the PLOT and DRA WTO statements to draw the
lines. In line 20, the title will be more effective if it is entered in inverse video
(use the Atari logo key).
10 FOR ST=1 TO 8: GF.:APHIC::; 7
15 POKE 752.• 1
20 ? : ? II At.a.r· i t s SPed a 1 Li eh t. s~.OIJJ
II : SETCOLOF~ 2, 0 ·' 0
30 SETCOLOR 1, 2*ST I 8 : COLOR 2
40 FOR DR=0 TO :;0 STEP ST
50 PLOT 0, 0 = DRAL·lTO 100 .. DR
60 NE:~=:T DR : FOR t·~=l TO 8(1~3: NE>=:T t·l: t · ~Ei·::i ST
70 FOR H=l TO 2000 = r·iE>=:T H: GOTO 10

Atari 800 Specifications

General

Processor	MOS Technology 6502
Processor Speed	1.79 MHz
ROM	10 KB
Graphics	ANTIC and GTIA chips
Release Year	1979
Display Resolution	up to 320 x 192
Colors	128 colors
Sound	4 channels
Storage	Cartridge, cassette, floppy disk
Ports	Cartridge, serial, monitor
Operating System	Atari OS