Atari 800XL Field Service Manual

Addrrss
Sua
Cfouod
C«i3i
Bus
0*:a Bus
Oata
Bus
Tf
iu»^
Triyo-
I
Tfijjef
2
TriRjcr
3
Opt>afi
St
Sfl _.
KtvboAfd
Click
?aC Color
CtfUy
Cfllor DeUy
AJphanum.
F^Atj
Alphmum,
Ctta
I
Afphftnum.
Dsoi 2
AI
1.
^ A2
Addicts 5^4J
A^
'
r
3» AJ
Arfd/TT-^a Na
V5S
I
'
JS A« Addrr^ 5ui
03
37 D* Cata 5u«
D2
3«
OJ D4U
Bus
01
33 oc Cara Bus
00
'
3* D7
Data
Bus
Tf
A
33 R/1 Rf fld/'^rita
n 31
c5
Gilp Srlwrt 1
n 10
CTTA 31
Lum
3
4
LuxTtinaoce
Line
T3 30
«>2
PSa-^ 2 Input
SjT 2»
FOO CTocJr Out
St 22 OSC 0%r-L^aiar
tnput
52 27 V-TC Pc-*i»*'
S3 26 HALf
HALT
PAL
23
C5YNC Output S/nC
CADJ .2* LUM
2 Luinina/x:* 2
Critpiit
ANQ
23 LUM
1 Lufninanco 1
Output
ANl
22 LUM J LajmLnanco
OxrTpirt
AN2
20 21 COL
Color
Figure N5. GTIA
Pin Auignmcnti
POT
KEYboard IntcRrated
Circuit (POKEY)
The POKEY
Is m custom Large Scale
Integrated circuit
(LSD chip. It ij
u^ed for
sudio generation.
Serial Input/Output
(SiO)
Data and CSocks, POT
ControJicr
Interface scan, and keyboard
scan.
Figure 1-4
Is an
itiustrallon
of the POKEY
pin assignments.
SOOXL
Computer
Field
Service Manual
1^7

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