Atari 400 Basic Reference Manual

BUILT-IN
FUNCTIONS
GRAPHICS
SOUND AND
GAMES
CONTROLLERS
WRAPAROUND
AND KEYBOARD
ROLLOVER
ERROR
MESSAGES
8 General Information
The section titled FUNCTION LIBRARY explains the arithmetic and special
functions incorporated into Atari BASIC.
Atari graphics include 9 graphics modes. The commands have been designed
to allow maximum flexibility in color choice and pattern variety. Section 9 ex-
plains each command and gives examples of the many ways to use each.
The Atari Personal Computer is capable of emitting a large variety of sounds .
including simulated explosions, electronic music, and "raspberries." Section 10
defines the commands for using the SOUND function and for controlling pad-
dle, joystick, and keyboard controllers.
The ATARI Personal Computer System has screen wraparound thus allowing
greater flexibility. It also allows the user to type one key ahead. If the user
presses and holds any key, it will begin repeating after
1
h second.
If a data entry error is made, the screen display shows the line reprinted preced-
ed by the message ERROR- and the offending character is highlighted. After
correcting the character in the original line, delete the line containing the
ERROR- before pressing IDi!liJI. Appendix B contains a list of all the error
messages and their definitions.

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)