Atari 800

TABLE
OF
CONTENTS
Section
Title
Page
INTRODUCTION
ix
1
THEORY
OF OPERATION
l-I
Overview
l-l
User Interface
1-2
*00/S00 Mechanical
Description
1-3
Motherboard 1-4
Central Processing
Unit
1-5
ROM Personality PCB 1-5
RAM PCB
1-5
Keyboard 1-6
Power
Supply 1-6
Program
Cartridge 1-6
*00/800 Electronic
Discussion 1-7
Central Processing
Unit
1-7
CPU 6502 Integrated
Circuit
1-7
Alphanumerical Television
1-S
Interface
Controller
Color Television
Interface 1-10
Adaptor
Grcphic Television
Interface
1-10
Adaptor
I/O
Decoder 1-10
Composite Video 1-10
Motherboard
Console
-
*00
l-l 1
Pot
Keyboard Integrated 1-11
Peripheral Interface
Adaptor
I
-1
1
Key-In Key-Out
Integrated 1-12
Circuit
Memory Map Decoder
1-12
I/O
Decoder
1-13
Motherboard Console
-
800
1-U
Bi-directional
Data Buffer
l-U
ROM
Personality Board
1-15
Power
Supply
1-16
ROM
Cartridge
1-17
Accessories
1-17
AC
Power Adaptor
1-17
TV
Switch Box
1-17
'BASIC
Program
Cartridge 1-17
2 SILKSCREEN
AND SCHEMATICS 2-1
3 TROUBLESHOOTING
AND TESTING 3-1
Overview
3-1
Tests
^
3-1
Equipment
Needed
3-1
Testing With
and
Without
3-2
the SALT II
Cartridge
ATARI
Home
Computer
iii