Atari 400 Field Service Manual

A.
ATARI
Consumer Product Service
Manacjer of
Tehnicai
Support
TECH
TIP
number
MODEL:
Atari 400/800
Computers
DATE:
WO
Computer
Follow WO
computer
disassembly instructions
in
*00/800
Home Computer
System Service Manual
to access motherboard.
Remove ROM
chips located
at
A103 (COU599A)
and
AlO*
(COlZ'fggA).
Replace COU599A
and COI2W9A with A103
(COU599B)
and
A104
(CO 12*99B)-
FoUow
reassembly
instructions in
^^00/800
Home
Computer System
Service
Manual.
800 Computer
Follow
800
computer
disassembly instructions
in *00/800 Home
Computer
System
Service
Manual Section
to access ROM module.
Remove ROM
chips located
at
A401
(COU599A)
and
A403
(C0^2'^99A)
on
ROM
module.
Replace C0U599A
and
C0l2t^99A
with AWl
(C0U599B)
and A403
(C012499).
Follow
reassembly
instructions in your 400/800 Home
Computer
System
Service
Manual under ROM
Module Installation.
TESTING
PROCEDURES:
Follow
standard test
procedures
using Atari
Stand
Alone
Test
(Diagnostic)
as
outlined
in
Atari
400/800
Computer System
Service Manual.
ENCLOSURE:
1.
400
Motherboard,
placement
2.
800
Personality
Board,
placement
O
I
-
I-
I
1C191
(3/a31

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)