Atari 400 Basic Reference Manual

A . Abbreviations, 4-5
Commands in headings, 4
ABS, 33
adata, 5
ADR,
35,63
aexp , 4
aop,4
Array, 3-4, 41
ASC,
37
ATASCII, 5, 40, C-1 through C-6
ATN, 34
Audio tra ck of cassette, 23
avar, 4
B BASIC, 1
Blanks (see Spaces)
Booting DOS, 25
Braces, 4
Brackets, 4
Branching,
Conditional Statements, 19
Unconditional Statements, 17
Brightness (see Luminance)
Bubble Sort Program, H-5
Buzzer, 14
Deferred Mode, F-1
Direct Mode, 14
BYE, 9
C C-Scale Program, 58
Central Input/Output Subsystem, 23
Character
Assigning Color to, 54
ATASCII,
C-1 through C-6
Displ
ay at specifie d locations, 46, 47
Set, internal, 55
Sizes
in Text modes, 46
Chaining Programs , 30
Ch
eckbook Balancer Program, H-1 through H-4
CHR$,
58
CIO (see Central Input/Output Subsystem) 6
CLEAR
key , 6
Clear Screen,
Deferred mode, 5, 14, 46
Direct mode, 6, 46
CLOAD, 24
CLOG, 33
CLOSE,27
CLR, 43
Codes,
Device, 23-24
Colons,
3, 61
COLOR,
48
INDEX
Color
Assigning, 54
Changing, 50
Default, 46, 51
Registers, 50
COM (see DIM)
Computer Blues Program , H-16
cmdno, 30
Comma, 26, 27
Command Strings , 1
Commands
BYE, 9
CONT, 9
END, 9
LET,
10
LIST, 10
NEW, 10
REM, 10
RUN , 11
STOP, 11
Conservation,
Memor y, 61
Constant , 2
CONT,
9
Controllers,
Game , 59
cos, 34
CSAVE, 24
Cursor , 9
Graphics, 49
Inhibit, 46
D Decimal/Hexadecimal Con ve rsion Program , H-18
Default
colors , 46
di sk drive, 24, 29
margins in Mode 0, 46
tab settings, 6
Deferr ed mod e, 5
DEG, 35
Devices, 23-24
Delete line, 13
DIM, 41
Direct mode, 5
Disk Driv e
Def au lt number , 24, 29
Requir e ments (see ATARI DOS Manual)
Disk file
Modification of BASIC program , 31
Displa y, s plit-screen override, 45, 47
Distor tion, 57
DOS, 25
DRAWTO , 48
Index 117

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)