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Amiga Agnus

1985

Amiga custom chip managing memory addressing, DMA and the blitter and copper coprocessors in Commodore's Amiga.

Machines

Amiga 1000

Amiga 1200

Amiga 500

Amiga 600

Operating systems

AmigaOS 1.3

AmigaOS 2.0

AmigaOS 3.1

Emulators

EmulatorTypeLicenseSite
AmiKitdownloadableFreeware
AmiberrydownloadableGPL-3.0
Amiga ForeverdownloadableCommercial
DenisedownloadableFreeware
E-UAEdownloadableGPL-2.0
PUAEdownloadableGPL-2.0
UAEdownloadableGPL-2.0
WinFellowdownloadableGPL-2.0
vAmigadownloadableGPL-3.0
vAmigaWebonlineGPL-3.0Website ↗

Reference & documentation

External technical references for programming Amiga Agnus and for writing emulators.

ResourceTypeNotes
MOS Technology Agnus ↗DatasheetPart numbers, variants, pinouts, DMA channels, specs
Amiga HRM: Coprocessor (Copper) Hardware ↗Instruction setCopper WAIT/MOVE/SKIP encoding and copper lists
Amiga HRM: Register Summary (Address Order) ↗Memory mapEvery DFF000 custom register by address, chip, R/W
Amiga HRM: System Memory Maps ↗Memory mapChip RAM and register address ranges
Amiga HRM: Fat Agnus Pin Allocation List ↗PinoutFull Fat Agnus pin assignments and signals
Amiga HRM: Blitter Hardware ↗ProgrammingBlitter DMA channels, area fill, line draw
Amiga Machine Code: DMA Revisited ↗ProgrammingAgnus DMA slot allocation, DDFSTRT/DDFSTOP timing
Amiga Hardware Reference Manual (3rd Ed, PDF) ↗ReferenceCanonical Commodore custom-chip programming manual
vAmiga Test Suite (vAmigaTS) ↗Test suiteADF tests plus real-hardware reference images