Atari 800XL Service Manual

The
cartridge
interface
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
console.
When
any
cartridge
is
plugged into
the
computer,
it takes
precedence
over
the
built-in
BASIC.
This
is a function
of hardware.
When no
cartridge
is
plugged
in,
the
hardware
enables
the
built-in
BASIC.
BOTTOM
Cartridge
Connector
Pin Assignments
21

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