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MOS Technology Agnus

The MOS Technology "Agnus", usually called Agnus, is an integrated circuit in the custom chipset of the Amiga computer. The Agnus, Denise and Paula chips collectively formed the OCS and ECS chipsets.

Chips by capability
OCS Agnus which can address up to 512 KB of Chip RAM (PLCC versions add 512 KB of pseudo-fast RAM) • 8361 (DIP) - Amiga 1000 (NTSC); Amiga 2000 model A (NTSC) • 8367 (DIP) - Amiga 1000 (PAL); Amiga 2000 model A (PAL) • 8370 (PLCC) - Amiga 500 to Rev 5.x (NTSC); Amiga 2000 model B to Rev 4.5 (NTSC) • 8371 (PLCC) - Amiga 500 to Rev 5.x (PAL); Amiga 2000 model B to Rev 4.5 (PAL) • ECS Agnus which can address up to 1 MB of Chip RAM • 8372 - no data* • 8372A - Amiga 500 from Rev 6 (NTSC/PAL); Amiga 2000 model B from Rev 6.0 to Rev 6.3 (NTSC/PAL); Commodore CDTV • 8375 (318069-16 only) (PAL) - Amiga 500 from Rev 6 (PAL); Amiga 2000 model B from Rev 6.4 (PAL) • 8375 (318069-17 only) (NTSC) - Amiga 500 from Rev 6 (NTSC); Amiga 2000 model B from Rev 6.4 (NTSC) • ECS Agnus which can address up to 2 MB of Chip RAM • 8372AB - Amiga 3000 from Rev 6.1 to Rev 8.9 (NTSC/PAL) • 8372B - Amiga 3000 Rev 9 (NTSC/PAL) • 8375 (PAL) - Amiga 500 Plus; Amiga 600 (PAL) • 8375 (NTSC) - Amiga 600 (NTSC) • Somewhere 8372A Agnus mentioned as simply "8372". == Chips by package ==
Chips by package
• 48-lead DIP Agnus (aka thin Agnus): 8361; 8367 • 84-contact PLCC Fat Agnus (named Fat Lady on most Amiga 2000 motherboards) 8370; 8371; 8372; 8372A; 8372AB; 8372B; 8375 NotesFat Agnus 1MB and Fat Agnus 2MB also known as Super Agnus; Super Fat Agnus; Fatter Agnus; Big Agnus; Big Fat Agnus. == DMA Channels ==
Pinout
PLCC versions When replacing or upgrading chips, pinouts need to be taken care of. Types are just mentioned for reference; four-digit types and pinouts/usage are not consistent. References: A500 Service Training, A3000 Service Manual, A500+ Service Manual, A1200 schematics == See also ==
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