Atari 400 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 400 Specifications

General

Manufacturer	Atari
Model	400
Type	Home Computer
Release Year	1979
CPU	MOS Technology 6502
CPU Speed	1.79 MHz
ROM	10 KB
Operating System	Atari OS
Keyboard	Membrane keyboard
RAM	8 KB (expandable to 48 KB)
Graphics	ANTIC and GTIA chips
Sound	4 channels
Display	RF output for connection to TV
Storage	Optional cassette tape drive or floppy disk drive
Ports	Cartridge
Display Resolution	320x192 (16 colors)