Atari 800XL Field Service Manual

rclfascd* NOTE:
The
conlrol
and shifl
Wcy*
c^anf^^
only
wt-tn
prri*ed
at ihc iam«
time
as
another
key, T>>e dWplay
for
both
keys
will
char^ge
to
inverse
video
and tJ>cn
back.
A»
each
W^y
(cKCrpt
RESET, HEl,P
4
BREAK)
11 presied,
a
lone
h genrraled,
ALLJ^ESTS
All
of the Self Tc*l» are executed one alter
ar^oiher until
rither the
HF.LP or
RESET key
is
pressed.
NOTE: When ALL
TESTS
i^
exeruting, the MEMORY
TEST and
the
AUDfO
VLSUAL TEST
eicit
afier one
complf-te test cycle.
KEYBOARD
TEST
during
ALL TESTS
is
software cor>tfo!ir-d.
No operator
input fs required.
SUFERSALT
T ESTING
For SuperSALT testing prof edires
rclef lo
SupcrSALT
Technical
U^^rr's
Manual
IP/N FDJ00770)-
800XL Computer
2-3
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