Agnus is the name of a range of custom chips that were featured in the Amiga home computer. The Agnus and Denise chips collectively formed the OCS/ECS chipsets.

Agnus was responsible for

• Providing DMA for sound and graphics
• Handling memory (Memory that can be accessed by the processor and the chipsets)
• Video timing
• The logic for the copper and blitter coprocessors.

Agnus was replaced by Alice in the A4000 and A1200 when the AGA chipset was introduced.

Systems

• Agnus (8361/8367)
  • A1000

• Fat Agnus (8370/8371)
  • A2000
  • A500

• Fatter Agnus (8372A/8372B)
  • CDTV

• Super Agnus (8372/8372b/8375)
  • A3000, A3000T
  • A500+, A600, CD32