Atari 800XL Technical Service Data

LINE DEFINITIONS
02.
OO.
AO thru A15.
A POT (1).
A POT (2).
AUDIO IN.
AUDIO OUT.
B02.
BACK (1).
BACK (2).
B POT (1).
B POT (2).
CADJ.
CAS.
CCTL
CLOCK IN.
CLOCK OUT.
COMMAND.
CS
CSO
CS2
DO thru D7.
DATA IN .
DATA OUT.
EXTEN B
EXTSEL.
FWD (1).
FWD (2).
HALT.
INTERRUPT.
IRQ.
LEFT (1).
LEFT (2).
LR/W.
MOTOR CONTROL
MPD.
PBO
PB1
PB7
PROCEED..
R/W.
RAS .
RD4
RD5
RDY.
REF.
RIGHT (1)...
RIGHT (2), ..
RST.
RSTSW ...
50
51
52
53
54
55
TRIGGER (1)
TRIGGER (2)
.Phase 2 Clock
.Phase 0 Clock
.Address
. .Potentiometer A (Joystick 1)
. .Potentiometer A (Joystick 2)
.Audio In
.Audio Out
.Gated Phase 2 Clock
.Back (Joystick 1)
.Back (Joystick 2)
Potentiometer B (Controller 1)
. Potentiometer B (Conroller 2)
.Color Delay
.Column Address Strobe
.Clock Input
.Clock Output
.Command
.Data
.Data input
.Data Output
.External Select
.Forward (Joystick 1)
.Forward (Joystick 2)
.Halt
.Interrupt
.Interrupt Request
.Left (Joystick 1)
.Left (Joystick 2)
.Latch Read/Write
Cassette/Disk Motor Control
.Math Pack Disable
.Non Maskable Interrupt
.Proceed
.Read/Write
Row Address Strobe
.Ready
.Refresh
Right (Joystick 1)
Right (Joystick 2)
.Reset
,... Reset Switch
Trigger (Joystick 1)
Trigger (Joystick 2)

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