Amiga OS
Amiga OS
Amiga OS is the native operating system for the Amiga line of personal computers, originally developed by Commodore International. First released in 1985 alongside the Amiga 1000, it was renowned for its preemptive multitasking, a graphical user interface (the Workbench), and advanced multimedia capabilities for its era. The system relies on a combination of a Kickstart ROM-based firmware and a disk-loaded operating environment, with versions spanning from 1.0 through to 3.1 and later third‑party continuations.
Features
Amiga OS features a cooperative multitasking kernel (later preemptive with the Exec component) that allowed multiple applications to run simultaneously. The graphical user interface, Workbench, presented a desktop metaphor with icons, menus, and windows. The system also included the AmigaDOS command‑line interface, which provided file‑system support and scripting. A notable feature was the ability to use ARexx (a REXX‑like scripting language) for inter‑application control. The operating system integrated tightly with the custom Amiga chipset (e.g., OCS, ECS, AGA) to deliver smooth animation, multiple screen resolutions, and four‑channel stereo sound without additional hardware.
History
Development of what became Amiga OS began in the early 1980s under the codename “Lorraine”. The original design team, including Carl Sassenrath and RJ Mical, created the multitasking kernel and the user interface. Version 1.0 shipped in 1985, followed by incremental updates (1.1, 1.2, 1.3) that improved stability and added features like the Amiga Basic interpreter.
After Commodore’s bankruptcy in 1994, rights to Amiga OS passed to Escom and later to Gateway 2000, which formed Amiga Inc. in 1997. Version 3.5 and 3.9 were released by Haage & Partner for AmigaOne systems. In the early 2000s, a new branch called AmigaOS 4 was developed for PowerPC‑based hardware, introducing a new memory protection model and updated drivers. Later development continued under Hyperion Entertainment, who released AmigaOS 4.1 for several platforms.