Atari 800 Basic Reference Manual

RESERVED
WORD:
DATA
DEG
DIM
DOS
DRAWTO
END
ENTER
EXP
FOR
FRE
GET
GOSUB
GOTO
GRAPHICS
. IF
INPUT
INT
LEN
A-2 Appendix
ABBREVIATION:
D.
DE.
DI.
DO.
DR.
E.
F.
GE.
GOS.
G.
GR.
I.
BRIEF SUMMARY
OF BASIC STATEMENT
Part ofREAD/DATA combination. Used to identify the
succeeding items (which must be separated by commas)
as
individual data items.
Statement DEG tells computer to perform
trigonometric functions in degrees instead of radians.
(Default
in radians.)
Reserves
the specified amount of memory for matrix,
array, or string. All string variables, arrays, matrices
must be dimensioned with a DIM statement.
Reserved word for disk operators. Causes the menu to
be displayed. (See DOS Manual.)
Draws a straight line between a plotted point and
specified point.
Stops program execution; closes files; turns off sounds.
Program may be restarted using CONT. (Note: END
may be used more than once in a program.)
I/0 command used to store data or programs in un-
tokenized (source) form.
Function returns e (2.7182818) raised to the specified
power.
Used with NEXT to establish FOR/NEXT loops. In-
troduces the range that the loop variable will operate in
during the execution of loop.
Function returns the amount of remaining user
memory (in bytes).
Used
mostly with disk operations to input a single byte
of data.
Branch to a subroutine beginning at the specified line
number.
Unconditional branch to a specified line number.
Specifies which of the eight graphics modes is to be
used. GR.O may be used to clear screen.
Used to cause conditional branching or to execute
another statement on the same line (only ifthe first ex-
pression is true).
Causes computer to ask for input from keyboard. Ex-
ecution continues only when i;i§ii@l key is pressed after
inputting data.
Function returns the next lowest whole integer below
the specified value. Rounding is always downward,
even when number is negative.
String function returns the length of the specified str-
ing in bytes or characters (1 byte contains 1 character).

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