Company Pedigree
| Ascendant Companies | Descendent Companies | ||
| Company | Comments | Company | Comments |
| Atari | Jay G. Miner left Atari in 1982 to co-found Amiga. | Commodore Business Machines, Inc. | In 1984, Commodore out bid Atari and bought Amiga, Inc. |
Company Overview
Amiga was was originally a startup called Hi-Torro and was founded by Jay Miner (Atari), Dave Morse (Mattel) and RJ Mical (Williams Electronics) in 1982. The startup’s vision was to create the next generation gaming console. When the gaming market collapsed in 1983, they regrouped and reworked their chipset in a computer concept code named Lorraine. In the process they developed the most an advanced microcomputer with robust graphics and audio. The Lorraine prototype was the direct model for the future Amiga 1000. In search of funding, Amiga reached out to Atari and Commodore. In the end Commodore won the bidding battle and Amiga became a subsidiary of Commodore Business Machines with Commodore Semiconductor Group (MOS Technology) as its chip making foundry.
Major Achievements
Development of the Amiga chipset
Chip Identification
All Amiga chips bear MOS, CBM, or CSG logos and copyrights.
Amiga Chips
| Nickname | Identification | Description | Comments |
| Akiko | Akiko Rev A CPN: 391563-01 | I/O Controller | Found in the CD32. Packaged in a 156-lead Quad SMD. |
| Alice | 8374 – Alice CPN: 391010-01 | Replaced Agnus | Found in the A4000. Packaged in 84-Contact PLCC |
| Amber | 51-Amber CPN: 390538-03 | Video control (flicker) | Found in the A3000. Packaged in 84-Contact PLCC. |
| Agnus | 8370 (NTSC) CPN: 318070-01 | Worked with Denise for video scan control. 512KB of memory | Part of the original chipset. Found in A500, A2000. Packaged in 84-Contact PLCC. |
| 8361 (NTSC) CPN: 252125-01 | Part of the original chipsetFound in A1000, A2000-A. Packaged in 84-Contact PLCC. | ||
| 8371 (PAL) CPN: 318071-01 | Part of the original chipset. Found in A500, A2000. Packaged in 84-Contact PLCC. | ||
| 8367R0 (PAL) | Part of the original chipsetFound in A1000, A2000-A. Packaged in 84-Contact PLCC. | ||
| 8372A (Fat Agnus) CPN: 318069-01 | Worked with Denise for video scan control. 1024KB of memory | Found in the A2500. Packaged in 84-Contact PLCC. | |
| 8375 (Fat Agnus)CPN: 390544-01
CPN: 318069-10 (A600) |
Found in the A300, A500+ and A600. Packaged in 84-Contact PLCC. | ||
| 8372B (Super Agnus) CPN: 318069-03 | Worked with Denise for video scan control. 2048KB of memory | Found in the A3000. Packaged in 84-Contact PLCC. | |
| Beauty | CPN: 391246-01 | ECS chips unique the the CDTV-CR (CDTV-II) | Found in the CDTV-CR (did not reach production) |
| Budgie | CPN: 391425-01 | Bus Controller | Found in the A1200, Packaged as a 128 Quad SMD. |
| Buster | 5721 | Bus Interface | Found in the A2000 and A2500. Packaged as a 40-lead DIP. |
| 45-Super Buster CPN: 390539-11 | Found in the A4000. Packaged in 84-Contact PLCC. | ||
| CIA | 8520 CPN: 391078-01/03 | Complex Interface Adapter – parallel, serial, and keyboard communications | Found in the A3000. Packaged as 40-lead DIP. |
| Denise | 8362R5 (Denise) | Worked with Agnus for video control. Came in NTSC and PAL versions | Part of the original chipset. Found in the A500, A1000, A2000 Packaged as a 48-lead DIP. |
| 8362R6 (Denise) CPN: 252126-01 | Part of the original chipset. Found in the A500, A1000, A2000 Packaged as a 48-lead DIP. | ||
| 8362R8 (Denise) CPN: 252126-02 | Found in the A500, A2000, and CDTV. Packaged as a 48-lead DIP | ||
| 8373R4 (Super Denise)CPN: 390433-01
CPN: 391081-10 (A600) |
Found in the A300, A600, A500+ and A3000. Packaged as a 48-lead DIP | ||
| DMAC | DMAC CPN: 390537-02 | DMA controller for SCSI | Found in the A3000. Packaged as a 84-contact PLCC. |
| Gary | 5719R2 (Gary) CPN: 318072-01 | Gary was an I/O type processor. He coordinated access to bus, the floppy drive, and the IDE port. In his spare time he did address decoding and also handled some self-diagnostic functions. | Part of the original chipset. Found in the A500 and A2000. Packaged as a 48-lead DIP |
| 41-Fat Gary (Fat Gary) CPN: 390540-02 | Gary was an I/O type processor. He coordinated access to bus, the floppy drive, and the IDE port. In his spare time he did address decoding and also handled some self-diagnostic functions. | Found in the A3000 and A4000. Packaged as a 84-contact PLCC. | |
| Gayle | AA-Gayle-R5 CPN: 391424-02 | Replaced the Gary chip | Found in the A1200. Packaged in 84-Contact PLCC |
| 45-Gayle CPN: 391155-01 | Found in the A300 and A600. Packaged in 84-Contact PLCC. | ||
| Grace | CPN: 391245-02 | ECS chips unique the the CDTV-CR (CDTV-II) | Found in the CDTV-CR (did not reach production) |
| Lisa | Lisa 1204R0 CPN: 391227-01 | Replaced the Denise chip | Found in the A1200, A4000, and CD32. Packaged in 84-Contact PLCC |
| Paula | 8364 CPN: 252127-01 | Handled peripheral interfaces, audio, UART, interrupt Lines, and bus arbitration | Part of the original chipset. Packaged in a 48-lead DIP |
| 8364R7 CPN: 252127-02 | Packaged in a 48-lead DIP | ||
| 8364R7 CPN: 391077-01 | Found in the A300, A600, A1200 and A2500. Packaged in 52-Contact PLCC. | ||
| Ramsey | 51-Ramsey CPN: 390541-04 | RAM controller | Found in the A3000. Packaged in 84-Contact PLCC |
| Vidiot | Not made by CSG. Outsourced to hybrid makers like Analog Devices. | 12-bit hybrid monitor driver interfaced with Denise | Found in the A300, A500, A500+, A600, A1000, A2000 and A3000. |
CPN = Commodore Part Number