Atari 400 Basic Reference Manual

CONTENTS
PREFACE vii
1
GENERAL INFORMATION
Terminolog y
1
Sp ec ial Not a tions U se d In Thi s Manual 3
Abbre v iation s Used In This M anual
4
Operating Modes
5
Spec ial Fun c tion K eys 5
Arithmetic Operator s
6
Operator Precedence
7
Built-In Fun c tions
7
Graphics 8
Sound and Games 8
W ra pa round and Key board Rollover
8
Error Messages 8
2
COMMANDS
BYE
9
CONT
9
E ND
9
LET 10
LIST
10
NEW
10
REM 10
RUN 11
S TOP
11
3
EDIT FEATURES
Scr ee n E diting
13
Control (CTRL) Key
13
Shift Key 13
Doub le K ey F un c ti ons
14
Cursor Control Keys
14
K ey s Used W ith CTRL Key
14
Keys Used W ith Shi ft K ey
14
Special Function Key s
14
Br e ak Ke y
14
Escape Key
14
4
PROGRAM STATEMENTS
FOR/NE XT /S TE P
15
GOSUBIRETURN
16
GOTO
17
I F/T H EN
18
Contents iii

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)