Atari 800XL

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