ChorusOS

ChorusOS
ChorusOS
Company / developer Chorus Systèmes / Sun Microsystems
OS family Real-time operating systems
Latest stable release 5.1
Marketing target Embedded systems
Supported platforms x86\68k\PPC\SPARC\ARM\MIPS
Kernel type Microkernel
Official website ChorusOS 5.0

ChorusOS is a microkernel real-time operating system designed for embedded systems. Sun Microsystems acquired Chorus Systèmes, the company which created ChorusOS, in 1997. Sun (and henceforth Oracle) no longer supports ChorusOS. The founders of Chorus Systems started a new company called Jaluna in August 2002. Jaluna has subsequently become VirtualLogix. VirtualLogix was itself acquired by Red Bend in September 2010. VirtualLogix designed embedded systems using Linux and ChorusOS (which they called "VirtualLogix C5"). C5 was described by them as a carrier-grade operating system, and was actively maintained by them. A visit to the Red Bend WEB site and searches on the Internet beyond that site show no trace of actual activity around the ChorusOS/VirtualLogix C5 microkernel - the microkernel is actually not mentionned anywhere on Red Bend's site. The source repository on SourceForge also shows zero sign of activity since July 2007.

ChorusOS started as the Chorus distributed real-time operating system at INRIA in the 1980s. Over time, development effort shifted away from distribution aspects to real-time and modularization (componentization).

The latest source tree of ChorusOS, an evolution of version 5.0, has been open-sourced by Sun and is available at the Sun Donwload Centre. The Jaluna project has completed these sources and the current version the Jaluna-1 software is available at [1]. Jaluna-1 is described there as a RT-POSIX layer based on FreeBSD 4.1, and the CDE cross-development environment. This software is still used according to the download server statistics.

External links

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