Atari 400 Basic Reference Manual

ON/GOSUB
20
ON!GOTO
20
POP
20
RESTORE
21
TRAP
22
5 INPUT/OUTPUT COMMANDS
Input/Output Devices
23
CLOAD
24
CSAVE 24
DOS 25
ENTER
25
INPUT
25
LOAD
26
LPRINT
26
NOTE
26
OPEN/CLOSE
26
POINT
28
PRINT
28
PUT/GET 28
READ/DATA
28
SAVE
29
STATUS
29
XIO
30
Chaining Programs
30
6
FUNCTION LIBRARY
Arithmetic Functions
33
ABS
33
CLOG
33
EXP
33
INT
33
LOG
34
RND
34
SGN 34
SQR 34
Trigonometric Functions
34
ATN
34
cos
34
SIN
35
DEG/RAD
35
Special Purpose Functions
35
ADR
35
FRE
35
PEEK
35
POKE
35
USR
36
7 STRINGS
ASC
37
CHR$
37
iv
Contents

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)