Atari 800XL

ELECTRICAL
THEORY
DlCriAL MAPOa'ARE
TJir
digital h^/dwATp
contriti
ol;
O
Tt>r
6?0?C
CPU rnfrjO[>rori-^^of
Th^ AlphAH^jncric Television Inltrfarp
CootrolJrr (AMnC)
D
Thr Craphjc5 Tc!rvii;ion
hiirrf^irr Adapior
(GTIA)
O
The
POT
KF.Yt-iard Inlr^ratrd
CirruJT (PC^KEY)
O
The
Prrjptirral
InT^riAte AHapinr
(PIAJ
T}»r M^mtry (O.5. ROM,
fUK
PAM^ At^ri f^ASIC ROM,
Rev. B)
O
MiscrM^r^eoirs logic
MejTiory MHinHgrrj^rnt
Unit (MMU)
Driay Line
o Parallel
!\u^
rmrrfrice (PBl)
650?C
CPU
MrfToDforg^sor
The
6>02C CPU microproressor
f ont.^ins rrgHtcr 'I**g^, interronnf^ctioni,
arithmetic
logic, contrni
logic, and
^11
rerognizrd
operaTJon rodrs- The
characteristics of the microprocessor
inrlude:
O
RyTe-orientrd
strijctiire
o I
51 oprc><1es
o
Drcimal ar>d
binary arithrr^efic nindri
o
"irven
addressing
mcxies
O
Trvie indrijng
o Stark pointer
o
Two
interrupt
levels
o
6*K address
range
o
tntegraJ clock
circuit
O
Single +5 volt DC
power requirement
Figure
U5 Is an illustration
of the
6502C CPU Pin Assingments.
amXL Computer
Field Vrvke
Manual