 The CTIA and ANTIC work together to produce a complete display, with the CTIA in charge of sprites and producing color video output, and the ANTIC in charge of bitmap (or "playfield" in Atari terms) and character graphics.The resulting system was far in advance of anything then available on the market.Commodore was developing their own video driver in-house at the time, but Chuck Peddle, lead designer of the 6502 used in the 2600 and the new machines, saw the Atari work during a visit to Grass Valley.