Custom Chips: Agnus
Anschluss: Andere

A DIP version of the 8361 Agnus

PLCC version of the 8370 Agnus

PLCC version of the 8371 Agnus

Agnus8361R3 - bytes
Agnus 8372A 318069-02 - bytes
Agnus 8372B 318069-029 - bytes
Agnus 8372B 318069-03 - bytes
Agnus 8372AB 318069-039 - bytes
Agnus 8375 318069-11 - bytes
Agnus 8375 318069-17 - bytes

Neupreis (1999) 25,35EUR (49,00DEM)

Ebay-Preis (10 2004) 1,99EUR (8372 A A500/2000)

The Agnus is responsible for controlling around 25 system DMA channels, the generation of various system clocks in some Amigas and for addressing Chip RAM. Infact, Chip Memory is so called because its addressable by the systems custom chips, unlike Fast Memory. The Agnus also cotains an integrated Copper (co-processor) which controls aspects of the Amigas display such as draggable screens, and the infamous "copper scrolls". The Amigas blitter is also located in the Agnus chip and is responsible for moving rectangular areas of memory efficiently as possible. This may not sound particularly spectacular but the blitter is twice as fast as the 68000 at moving blocks of memory and is capable of doing it asynchronously with the 68000, meaning the processor is totally free for other operations. The blitter is particularly useful for graphics operations. Agnus is found in the OCS & ECS chipsets, and is the equivalent of Alice in the AGA chipset.

Chip Name Chip Number Part Number Used In
Agnus (512K) 8361 252125-01 A1000 (NTSC), A2000A (NTSC)
Agnus (512K) 8361 R3 A1000(NTSC), A2000A(NTSC)
Agnus (512K) 8367 252362-01 A1000 (PAL), A2000A (PAL)
Agnus (512K) 8370 318070-01 A500 (NTSC), A2000 (NTSC)
Agnus (512K) 8371 318071-01 A500 (PAL), A2000 (PAL)
Agnus (1MB) 8372 318069-02 A500 (PAL), A2000 (PAL) Regular Type
Agnus (1MB) 8372A 318069-029 A500 (PAL), A2000 (PAL) (changed after some damage)
Agnus (2MB) 8372AB 318069-03 A3000 (PAL), A3000T (PAL)
Agnus (2MB) 8372B 318069-03 MegAChip (NTSC)
Agnus (2MB) 8375 R0 318069-18 A500+ (PAL), A600 (PAL)
Agnus (1MB) 8375 / 8375 R1 318069-16 A500 (PAL), A2000 (PAL)
Agnus (2MB) 8375 R2 318069-10 A500+ (PAL), A600 (PAL)
Agnus (2MB) 8375 318069-11 A500+(NTSC) and A600(NTSC)
Agnus (1MB) 8375 318069-17 A500 (NTSC), A2000 (NTSC)
Agnus (2MB) 8375 318069-19 A3000 (NTSC), A3000T (NTSC)
Agnus (2MB) 8375 390544-01 A500+ (PAL), A600 (PAL)
Agnus (2MB) 8375 390544-02 A500+ (NTSC), A600 (NTSC)

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Alexander Holland, Joe Torre, Mathieu Burgerhout, RiWa & Friends, Takahasi Kasiko

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