Atari 800 User Manual

Atari BASIC Reference Guide 153
OR
The OR statement is a logical operator that returns the value 1 if
either One of its arguments are true. An OR statement returns
the value 0 only if both of its arguments are false.
CONFIGURA liON
EX OR EX
The conditions of true and false are represented by the values 1
and
0 respectively. The results of the OR operation are
represented by the
following truth table.
A B A
OR B
o 0 0
o 1 1
1 0 1
1 1 1
An OR statement can have either relational or algebraic
expressions
for arguments. Any algebraic expression that does
not equal zero is true. An expression that equals zero is
considered false.
EXAMPLES
5 (true)
3-7 (true)
"DOG" = "CAT" (false)
8<2 (false)
In the previous examples, 5 is considered true because it does
not equal zero. The expression 3-7 is also true because it does not
evaluate to zero. The relational expression "DOG" = "CAT" is
false because the stri ng constants are not equal. The expression 8
<2 is also false.

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