Atari 800XL Field Service Manual

Data Slii
Can
5aj
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Pot Scnn
Pot Zam
Paz
fcaii
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Pot Son
Keyboard
Response
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V
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Scan
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1
D3 2
3
03
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s
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7
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P* 10
P3
11
P2 12
P3 13
PO
14
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ica Ifi
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17
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ia
20
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3X
DO
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AUDIO
34
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35
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3*
A2
33
A3
32
a/T
31
C31
30
csa
23
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500
27
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23
krI
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23 KO
22
in
21
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Out
Addr—
3
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Chip S^J
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ScriaJ
Input
Cat*
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Sc-in
Kcytioird Scan
Kc-rbo*ni
Scan
Figurr
1-6*
POKEY pin assignments
Pgripheral InTerface Adaptor (PfAj
The PIA [S
a
general purpose Input/Ootput (!/0) chip.
It monitors
the X-Y
controller interfaces
and the 510 control line** In certain
apphcations it may
control the MMU logic
-
-
Figure
t-7 Is an
illustration
ol the PIA
a55ignments-
SOOXL
Compiricr
Field Service Manual
1-8

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