Atari 800XL Field Service Manual

C
6MTROILER
JACK
FNTERFACES
The JOOXL provides two
con&oJIcr jacV
inTerf^c^s* Both
are functior.ally and
electrically
idcnticaL The
controlW
jacks
aic 9-pjn D-type male connectors-
Figure
I
'to s^iows Uic
pin a^^ignrfkenis
for
the
?-pjn conrtectors-
1,
Ooystick
Forward
Input 6. Trigger
Input
2,
(Joystick) BacJf Input 7. +5 volts
3,
(Joystick) Leit Input S. Ground
^- (3oysTic30 Right
Input
9-
A
Potentiometer
Input
3-
B
Potentiometer,
Input
Figire I-IO-
Controller lack Pin
Assignments
CARTRIDGE
INTERFACE
The cartridge inlerface
connects cartridges to the
computer
with
a
30-pin.
connector.
The
Atari 800XL has Revision B
of Atari
BASIC built-in.
This is
equivalent
to
having
a
BASIC cartridge
"permanently" plugged
into the
coasole-
When
any
cartridge
is
plugged into
the computer, it takes
precedence
over the
built-in
BASIC This
is a fiffictjon of hardware. When no cartridge
is
plugged
in, the
hardware enables
the
built-in
BASIC
Figure
l-ll
Illustrates the pin
assignments oi the
cartridge
connector.
SOOXL Computer
1-13
Field Service Manual

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