Atari 800 Basic Reference Manual

APPENDIX A
ALPHABETICAL DIRECTORY
OF BASIC RESERVED
WORDS
Note: The period is mandatory after all abbreviated ke y word s.
RESERVED
WORD:
ABS
ADR
AND
ASC
ATN
BYE
CLOAD
CHR$
CLOG
CLOSE
CLR
COLOR
COM
CONT
cos
CSAVE
ABBREVIATION:
B.
CLOA.
CL.
c.
CON.
BRIEF SUMMARY
OF BASIC STATEMENT
Function returns ab s olute value (un s igned ) of the
va riable or e xpr essio n.
Function returns memory address of a s tring.
Logical op er a tor: Expre s sion is tru e onl y if both s ub ex -
pressions joined by AND are true.
String function return s the numeric v alue of a single
string chara c ter.
Function returns the arctangent of a number or expres-
sion in radi ans or deg rees.
Exit
from BASIC and return to the re s ident operating
system or console processor .
Loads
data from Program Recorder into RAM.
String funct i on returns a single string byte equiv a lent
to a num e ri c v alu e be twe en 0 and 2 55 in AT ASC II cod e.
Function returns the base 10 logarithm of an expres-
sio n.
I/0 statement used to close a file at the conclusion of I/0
operations.
Th e opposite of DIM: Undimension s all string s;
matrices.
Chooses co lor r eg ist er to be us ed in color graphi cs
work .
Sa
me as DIM.
Continue. Causes a
program to restart execution on the
next line following use of the i·l;it!M ke y or encounter-
ing a STOP .
Function returns the cosine of the variable or expre s-
sion (degrees or radian s ).
Outpu ts data f rom RAM to th e Pr og ram R ec ord er for
tape storage.
Ap pendix A-1

Atari 800 Specifications

General

Processor	MOS Technology 6502
Processor Speed	1.79 MHz
ROM	10 KB
Graphics	ANTIC and GTIA chips
Release Year	1979
Display Resolution	up to 320 x 192
Colors	128 colors
Sound	4 channels
Storage	Cartridge, cassette, floppy disk
Ports	Cartridge, serial, monitor
Operating System	Atari OS