The Enhanced Chip Set (ECS) is the second generation of the Amiga computer's chipset, offering minor improvements over the original chipset (OCS) design. ECS was introduced in 1990 with the launch of the Amiga 3000. Another version was developed around 1994 but was unreleased due to Commodore International filing for bankruptcy.[1] Amigas produced from 1990 onwards featured a mix of OCS and ECS chips, such as later versions of the Amiga 500 and the Commodore CDTV.[2] Other ECS models were the Amiga 500+ in 1991[3] and lastly the Amiga 600 in 1992.