Atari 800 Basic Reference Manual

RESERVED
WORD:
PTRIG
PUT
RAD
READ
REM
RESTORE
RETURN
RND
RUN
SAVE
SETCOLOR
SGN
SIN
SOUND
SQR
STATUS
STEP
STICK
STRIG
STOP
A-4 Appendix
ABBREVIATION:
PU.
REA.
R. or • lffilS'J
RES.
RET.
RU.
s.
SE.
so.
ST.
STO.
BRIEF SUMMARY
OF BASIC STATEMENT
Function returns status of the trigger button on game
controllers.
Causes output of a single byte of data from the computer
to the specified device.
Specifies
that information is in radians rather than
degrees when using the trigonometric functions.
Default is to RAD. (See DEG.)
Read the next items in the DATA list and assign to
specified variables.
Remarks. This statement does nothing, but comments
may be printed within the program list for future
reference by the programmer. Statements on a line that
starts with REM are not executed.
Allows DATA to be read more than once.
RETURN from subroutine to the statement immediate-
ly following the one in which GOSUB appeared.
Function returns a random number between 0 and 1,
but never 1.
Execute the program. Sets normal variables to 0, un-
dims arrays and string.
I/0 statement causes data or program to be recorded on
disk under filespec provided with SAVE.
Store hue and luminance color data in a particular color
register.
Function returns + 1 if value is positive, 0 if zero, - 1 if
negative.
Function returns trigonometric sine of given value
(DEG or RAD).
Controls register, sound pitch, distortion, and volume of
a tone or note.
Function returns the square root of the specified value.
Calls
status routine for specified device.
Used
with FOR/NEXT. Determines quality to be
skipped between each pair of loop variable values.
Function returns position of stick game controller.
Function returns 1 if stick trigger button not pressed, 0
if pressed.
Causes execution to stop, but does not close files or turn
off sounds.

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