 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.Other ECS models were the Amiga 500+ in 1991 and lastly the Amiga 600 in 1992.

Notable improvements were the "Super Agnus" and the "HiRes Denise" chips.The sound and floppy controller chip, "Paula", remained unchanged from the OCS design.