Atari 800 Service Manual

Figure 5-16. 800 Console Motherboard, Locations
800 Motherboard
• A101 POKEY chip - Used to control POT lines, audio signal, keyboard
information lines as well as printer and floppy control lines.
The PORT Test indicates a defective POKEY chip by displaying '1'
in Rows G, H in any position.
• A102 PIA chip - Used to control joystick lines, and Program
Cassette Recorder control Lines.
The PORT Test indicates a PIA chip by displaying a ' 1' in Rows,
A, B, C, D, or E in any position.
5-29 System Service Manual

Atari 800 Specifications

General

Processor	MOS Technology 6502
Processor Speed	1.79 MHz
ROM	10 KB
Graphics	ANTIC and GTIA chips
Release Year	1979
Display Resolution	up to 320 x 192
Colors	128 colors
Sound	4 channels
Storage	Cartridge, cassette, floppy disk
Ports	Cartridge, serial, monitor
Operating System	Atari OS