Atari POKEY

Atari · 1979 · POKEY (Pot Keyboard Integrated Circuit)

Atari's multi-purpose chip that generated four voices of sound while also reading paddle controllers and keyboards — the audio of the Atari 8-bit computers and of arcade classics like Centipede and Gauntlet.

POKEY — short for "Pot Keyboard Integrated Circuit" — was designed by Doug Neubauer at Atari and first shipped in 1979 with the Atari 400 and 800 home computers, later appearing in every model in that family and in the Atari 5200 console. Its name reflects its curiously mixed job description: it was a single chip that combined several unrelated functions the system needed, from input handling to sound to random-number generation, an economical piece of design typical of the era's effort to do as much as possible with as few chips as possible. The "Pot" and "Keyboard" in its name refer to two of those functions. POKEY read the potentiometers in paddle controllers — the analog dials that games like the era's bat-and-ball titles depended on — and it scanned the computer's keyboard matrix. It also served as a source of pseudorandom numbers, a genuinely useful facility for games that needed unpredictability. But the function it is best remembered for is audio: POKEY produced four independent voices of square-wave sound, playable as clean tones or reshaped with a set of distortion settings that gave it a gritty, characterful timbre. While Neubauer designed the chip overall, its audio components were the work of Steven Mayer and Ronald Milner. That sound hardware defined the voice of the Atari 8-bit computers, and Neubauer himself demonstrated its potential in Star Raiders, the platform's landmark space-combat game and one of its killer applications. But POKEY's reach extended well beyond the home. Atari used the chip for audio in a long list of arcade games through the 1980s — Centipede, Missile Command, Asteroids Deluxe, and Gauntlet among them — so that the same silicon responsible for the sound of a home computer was also responsible for the sound of some of the most famous cabinets in the arcade. POKEY endures as a favourite among chiptune musicians and a distinctive piece of Atari's technical heritage. Its four raspy voices are as recognisable to enthusiasts of the Atari sound as the SID is to Commodore fans, and its dual life across home and arcade hardware makes it one of the more versatile and widely heard chips of its generation. That a single component could read your paddle, scan your keyboard, roll dice, and sing was very much the point — and it sang well enough to be remembered for it four decades later.