AmigaOS 4

AmigaOS 4
Name	AmigaOS 4
Developer	Hyperion Entertainment
Family	AmigaOS
Source model	Closed source
Released	24 December 2004
Latest release version	4.1 Final Edition Update 2
Latest release date	24 December 2022
Marketing target	Amiga platform enthusiasts
Kernel type	Microkernel
Ui	Graphical user interface
License	Proprietary
Predecessor	AmigaOS 3.9

AmigaOS 4. It is a modern, proprietary operating system developed for PowerPC-based Amiga computers and compatible hardware. As the direct successor to the classic AmigaOS 3.9, it represents a significant evolution of the original AmigaOS while retaining its hallmark efficiency and low hardware requirements. The system is developed and marketed by Hyperion Entertainment under license from Amiga, Inc., continuing the legacy of the innovative platform pioneered by Commodore International.

History

The development of this operating system began in the late 1990s following the commercial decline of the original Amiga platform. After the bankruptcy of Escom AG and the subsequent acquisition of Amiga assets by Gateway, Inc., the rights were eventually transferred to Amiga, Inc. In 2001, Hyperion Entertainment was contracted to create a new PowerPC-native version, leading to a prolonged development cycle. The project's history has been marked by legal disputes between Hyperion Entertainment and Amiga, Inc. over intellectual property rights, which were largely resolved in favor of the developer. The first official release emerged for AmigaOne motherboards, with subsequent versions expanding to classic Amiga 1200 and Amiga 4000 systems equipped with PowerUP accelerator boards.

Features

The system introduces a fully preemptive multitasking kernel, a major advancement over the original AmigaOS's cooperative multitasking model. It features an enhanced Workbench graphical interface with support for TrueType fonts, alpha compositing, and a themeable appearance. Core components include the ExecSG kernel, the AmigaDOS command-line interface, and the Intuition windowing system, all significantly updated. It incorporates a modern TCP/IP stack, supports OpenGL ES for 3D graphics, and includes a integrated Python interpreter. The AROS Research Operating System project has contributed to some areas of its development, particularly in driver support.

Hardware compatibility

Officially supported hardware includes the AmigaOne series of motherboards, such as those from Eyetech and ACube Systems Srl. It also runs on the Sam440ep, Sam460ex, and X5000 systems. For classic Amiga computers, support is provided for models like the Amiga 1200 and Amiga 4000 when upgraded with a PowerPC accelerator card, such as those from Phase5. The operating system has been ported to other PowerPC platforms, including the Pegasos II from Genesi and the Wii game console from Nintendo, though these are often unofficial. Modern peripherals are supported through updated USB and PCI drivers.

Software compatibility

A key feature is its ability to run a large library of legacy software written for the Motorola 68000 series through an integrated JIT emulation system. Many classic applications and games from the era of Commodore International function seamlessly. Native software has been developed, including the Origyn Web Browser, the Final Writer word processor, and development tools like the GCC compiler. The system supports modern file systems like JXFS and SFS, while maintaining compatibility with the original Amiga Fast File System. An official Software Development Kit is available for creating new applications.

Development and releases

Development is managed by Hyperion Entertainment, with contributions from the global Amiga community. The first public release, Version 4.0, debuted in 2004 for the AmigaOne. Major updates include Version 4.1, which introduced support for classic Amiga hardware, and the 4.1 Final Edition, which consolidated years of improvements. Updates are typically distributed digitally, with physical editions available from partners like ACube Systems Srl. The development roadmap has included projects to enhance OpenGL support and improve USB 3.0 functionality, though progress has been measured due to the niche market.

Reception and legacy

The operating system has been received as a competent and faithful modernization of a beloved platform, praised for its speed and low resource use by publications like Amiga Future. It has sustained a dedicated, albeit small, community of users and developers long after the demise of Commodore International. Its existence has helped preserve the unique culture of the Amiga scene, inspiring related projects like AROS and MorphOS. While not a commercial competitor to mainstream systems like Microsoft Windows or Linux, it remains a significant and ongoing chapter in the history of personal computing, demonstrating the enduring appeal of the original AmigaOS design philosophy.

Category:AmigaOS Category:PowerPC operating systems