Atari 400 User Manual

Atari BASIC Reference Guide 169
In the four-color graphics modes (3 , 5, and 7), the value that a
PUT statement sends to the screen is reduced modulo 4 to a
value between 0 and 3. The PUT statement illuminates the
picture element at the current position of the cursor.
The
color of the picture element is determined by the value
between 0 and 3 in the same way that a COLOR statement value
determines the color.
In the two-color graphics modes (4, 6, and 8), the value of the
PUT statement is reduced modulo 2 to the numbers 0 or 1. The
color of the picture element is determined by the values 0 and 1
in the same way that a COLOR statement determines the color.
A PUT statement can also be used to send output to a printer. The
printer must be ready to operate when the corresponding OPEN
statement is executed.
PUT can also be used to send data to an open RS-232 serial port
on the Atari 850 Interface Module.
RAD
The RAD statement causes the trigonometric functions to be
performed in radians.
CONFIGURA liON
RAD
EXAMPLE
RAD
The
trigonometric functions are performed in radians until a
DEG statement is executed. Also, radians are used following a
NEW
or RUN statement or following a System Reset.

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)