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Atari 400 Field Service Manual

Atari 400
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The right
side panel of the
Atari
*00 Computer Console contains
a peripheral jack,
power ON/OFF switch,
and a power jack. The channel
2/3
switch
is located
on
the
back of the console. This switch
changes the console transmission
frequency to
either
channel 2 or
channel 3 (refer to
Figure 1-1).
The right side
panel of the
Atari 800 Home
Console contains a monitor jack, a
peripheral jack,
a channel 2/3 switch, a power
ON/OFF switch,
and a power jack (refer
to Figure
1-2),
Both Console keyboards
provide
a
full alphanumeric character
set, cursor controls, and
special purpose keys- The
alpha keys when used in conjunction with the Control
(CTRL)
key become
special graphic symbols.
To
the right of the keyboard
is the
power
ON
light and four
special control
keys
(refer to
Figure
1-1
and Figure
1-2).
From
the top to the bottom they are:
SYSTEM RESET
-
Interrupts whatever
the computer is doing and restarts
the
Operating System
or
Program
Cartridge.
OPTION -
Interrupt
used by the Program
Cartridge to choose among
the variations
within a game or program.
SELECT
-
Interrupt
used to select one
of
several
games or programs
on the
Program
Cartridge.
START
-
Interrupt
used to Start the game or program
selected from
the Program
Cartridge.
»00/800 MECHANICAL
DESCRIPTION
The Atari
WO/SOO
Computer Home
Consoles are made up
of
seven
major functional
modu
es
they
are:
Motherboard
Central
Processing Unit (CPU)
Printed Circuit Board
ROM
Personality
Printed
Circuit Board (Operation
System) (300 Only)
RAM
Printed Circuit
Board(s)
Keyboard
Power
Supply Board
Program
Cartridge
ATARI
Home
Computers
1-3

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Atari 400 Specifications

General IconGeneral
ManufacturerAtari
Model400
TypeHome Computer
Release Year1979
CPUMOS Technology 6502
CPU Speed1.79 MHz
ROM10 KB
Operating SystemAtari OS
KeyboardMembrane keyboard
RAM8 KB (expandable to 48 KB)
GraphicsANTIC and GTIA chips
Sound4 channels
DisplayRF output for connection to TV
StorageOptional cassette tape drive or floppy disk drive
PortsCartridge
Display Resolution320x192 (16 colors)

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