The Atari 8-bits were introduced in 1979 and were moderately popular in the early 1980s at least in the US because they had considerably better graphics and sound than their competitors. This was due to (unlike most other early 8-bits) they used custom chips similar to those later used in the Amiga -- and in fact one of the primary engineers for the Atari 8-bits was Jay Miner, who also played a big role in the Amiga.