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Atari 400 Field Service Manual

Atari 400
207 pages
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400 GREY
BAR
TROUBLESHOOTING
(cont)
Ar« tha foUowtng
presant Glefer
*5v
on Modulator
Pin S
Signal
on Modulator
Pin
4
Signal on
Modulator
Pin
2
YES
Ooaa
scraan
look
Uka Figura 3-6
NO
NO
I
Trace
circuit
back to
"
pravious
step
JCSS.
Go
to
ANY
VIDEO,
Paga
5-18
Call
ATARI
Tech Line
Specialist
Inside
California
(800) 672-1466
Outside
California
(800)
538-153S
(800) 538-1536
ATARI
Home
Computer
5-17

Table of Contents

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Basic Reference Manual122 pages
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Preview: Hardware Manual
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Preview: Installation Instructions
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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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