Atari 800XL Technical Service Data

LOGIC CHART
Logic Probe Display
L = Low
H = High
P = Pulse
* = Open {No light On)
Note: Logic probe readings taken with computer turned
On, no keys pressed, unless otherwise noted.

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