Atari 400 User Manual

82 User's Handbook to the Atari 400/800 Computers
Illustration 4-1. Graphics Example Program Ouput
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Variable Storage
Atari BASIC keeps a list of the variable names used in a program
in its variable name table. A m ax imum of 128 variable names can
be stored in the variable name table. Therefore, an Atari BASIC
program is effectively limited to a maximum of 128 variables.
These include numeric, string, and array variables. An array
variable name counts as only 1 name in the variable name table ,
regardless
of the number of elements within that array.
Every
time a new variable is entered in the imm e diate mode, that
name is added to the variable name table. In the program mode,
variables are added to the variable name table as they are
encountered in the program.

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)