Atari 800XL Service Manual

TABLE Q£_ CONTENTS
SECTION
1-
THEORY
OF
OPERATION
User
Interface
Mechanical
Theory
Electrical
Theory
6502C
CPU
Microprocessor
Alphanumeric
Television
Interface
Controller
(ANTIC)
Graphic
Television
Interface
Adaptor
(GTIA)
POT
KEYboard
Integrated
Circuit
(POKEY)
Peripheral
Interface
Adapter
(PIA)
Memory
( ROMs
and
DRAMs)
Memory
Management
Unity
(
MMU)
Operating
System
ROM
RF
Modulator
Monitor
Output
Power
Supply
System
Interface
Serial
Input/Output
(SIO)
Interface
Controller
Jade
Interfaces
Parallel
Bus
Interface
(PB
I
)
Cartridge
Interface
Keyboard
Interface
SECTION 2
-
SELF
TESTING
Overview
Equipment
Needed
Self
Test
Features
Description
of
Self
Tests
Memory
Test
Audio
Yisual
Test
Keyboard
Test
All
Tests
SECTION
1
-
DISASSEMBLY/ASSEMBLY
SECTION
4
-
TROUBLESHOOTING
A
Guide
to
Aid
in
the
Rapid
Diagnosis
of
Problems
SECTION
5-
SCHEMATIC
AND
PARTS
LIST
Parts
List
5
5
9
9
10
11
12
13
14
15
15
15
15
17
17
18
18
19
20
21
22
23
23
23
23
24
24
25
25
25
26
27
31
32
A

Atari 800XL Specifications

General

Manufacturer	Atari
Type	Home computer
Release year	1983
CPU	MOS Technology 6502C
RAM	64 KB
ROM	24 KB
Operating System	Atari OS
CPU Speed	1.79 MHz (NTSC) / 1.77 MHz (PAL)
Graphics	ANTIC and GTIA chips
Display resolution	160×192 to 320×192 pixels
Sound	POKEY chip
Storage	Cassette tape, floppy disk
Ports	Serial, parallel, monitor, joystick ports