POKEY, an acronym for Pot Keyboard Integrated Circuit, is a digital I/O chip designed by Doug Neubauer at Atari, Inc. for the Atari 8-bit computers. It was first released with the Atari 400 and Atari 800 in 1979 and is included in all later models and the Atari 5200 console. POKEY combines functions for reading paddle controllers (potentiometers) and computer keyboards as well as sound generation and a source for pseudorandom numbers. It produces four voices of distinctive square wave audio, either as clear tones or modified with distortion settings. Neubauer also developed the Atari 8-bit killer application Star Raiders which makes use of POKEY features.
POKEY in an Atari 130XE
The Atari 8-bit computers, formally launched as the Atari Home Computer System, are a series of 8-bit home computers introduced by Atari, Inc. in 1979 with the Atari 400 and Atari 800. It is the first home computer architecture with coprocessors, enabling more advanced graphics and sound than most of its contemporaries. Video games are key to its software library, and the 1980 first-person space combat simulator Star Raiders is considered the platform's killer app.
The Atari 800's nameplate is on the dual-width cartridge slot cover.
Atari 400 (1979) has a membrane keyboard and a door covering the single cartridge slot.
Atari 800 with the cover removed, showing expansion cards and two cartridge slots. The slots are molded into the cast aluminum RF shield.
The Atari 800 has expansion cards for the RAM, ROM, and processor. It eventually shipped with three of these 16KB RAM cards, for a total of 48KB.