MOS Technology Agnus

• The Blitter, a Bitmap image manipulator. The Blitter is capable of copying blocks of display data, or any arbitrary data in the on-board memory, at high speed with various raster operations as well as drawing pixel perfect lines and filling outlined polygons, while freeing the CPU for concurrent tasks.
• "Copper" a display synchronized co-processor.
• 25 Direct Memory Access channels, allowing graphics, sound and I/O to be used with minimal CPU intervention.
• DRAM refresh controller.
• Memory controller
• Generates the system clock from the 28 MHz oscillator
• Video timing.

Chips by capability

• OCS Agnus which can address up to 512 kB of Chip RAM
• * 8361 - Amiga 1000 ; Amiga 2000 model A
• * 8367 - Amiga 1000 ; Amiga 2000 model A
• * 8370 - Amiga 500 to Rev 5.x ; Amiga 2000 model B to Rev 4.5
• * 8371 - Amiga 500 to Rev 5.x ; Amiga 2000 model B to Rev 4.5
• ECS Agnus which can address up to 1 MB of Chip RAM
• * 8372 - no data*
• * 8372A - Amiga 500 from Rev 6 ; Amiga 2000 model B from Rev 6.0 to Rev 6.3 ; Commodore CDTV
• * 8375 - Amiga 500 from Rev 6 ; Amiga 2000 model B from Rev 6.4
• * 8375 - Amiga 500 from Rev 6 ; Amiga 2000 model B from Rev 6.4
• ECS Agnus which can address up to 2 MB of Chip RAM
• * 8372AB - Amiga 3000 from Rev 6.1 to Rev 8.9
• * 8372B - Amiga 3000 Rev 9
• * 8375 - Amiga 500 Plus; Amiga 600
• * 8375 - Amiga 600

Chips by package

• 48-lead DIP Agnus : 8361; 8367
• 84-contact PLCC Fat Agnus 8370; 8371; 8372; 8372A; 8372AB; 8372B; 8375

DMA Channels

Pinout

PLCC Versions