Atari 400 Field Service Manual

The ATARI
800 Home
Computer
Console contains
the CPU
and memory
in
the form
of
the Operating
System
(iOK
of read-only-memory
(ROM))
and SK
to i6K
(standard)
of
user
programmable
random
access memory
(RAM);
plus two
expansion
sockets for
additional RAM
modules
(maximum
^8K). The
console also
contains
the keyboard,
cartridge
slots
(2),
controller
jacks
and a serial I/O
port for
connecting
peripheral
devices
(see Figure 1-2).
HAND
CONTtOUn
tACKS
SYSTEM
HSCT
SWITCM
Figure 1-2.
ATARI
800
Home
Computer
Console
USER
INTERFACE
The ATARI
*00/8G0
Home
Computer
Consoles
are
general
purpose
microcomputers
using
the
6502
microprocessor.
The ATARI
i^OO/800
Consoles
are the
central
processing
units
for
their
respective
systems.
Each
console
comes
standard with
a
built-in
typewriter
style
keyboard,
8K/16K
of
RAM,
ROM
operating
systems,
connector
jacks
for
adding
peripherals
and hand
controllers,
and a
15-foot Radio
Frequency
(RF)
cable
for
connection
to the
user's television
set.
The
controller
jacks
on the
front
of both
consoles
accepts
the X-Y
(joystick) and
paddle
hand
controllers
available
from ATARI.
ATARI
Home
Computers
1-2

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)