Atari 800 Field Service Manual

SECTION I
THEORY
OF OPERATION
OVERVIEV
The Atari
*00 Computer
Home
Console
contains
the central
processor
unit (CPU)
and
memory
in the
form
of the
Operating
System
(read-only-memory
(ROM))
and 8K or
16K of
user
programmable
random
access memory
(RAM).
The
console
contains
the
keyboard,
cartridge
slot,
controller
jacks,
and serial
input/output (I/O)
port for
connecting
peripheral
devices
(see Figure
l-U.
rawci
oNforr
SWITCH
KiirmsAL
CONNECTOa
JACK
SYSTIM RESET
SWITCH
Figure 1-1.
ATARI
^00
Home
Computer
Console
ATARI
Home
Computers
1-1

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