JavaOS

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Web site: (not active)
Origin: USA
Category: Desktop
Desktop environment: CLI
Architecture: x86, ARM, PowerPC, SPARC
Based on: Chorus
Wikipedia: JavaOS
Media: Install
The last version | Released: 1999

JavaOS – a closed source, based on a Java virtual machine, and written in Java operating system developed by Sun Microsystems. JavaOS is a highly compact operating system designed to run Java applications directly on microprocessors in anything from net computers to pagers.

JavaOS brings the design advantages of the Java™ programming language to an operating system. As perhaps the smallest and fastest OS that runs Java, JavaOS enables Java on a broad range of devices. JavaOS will run equally well on a network computer, a PDA, a printer, a game machine, cellular telephone, or countless other devices that require a very compact OS and the ability to run Java.

In addition, JavaOS has been built to be fully ROMable for embedded applications, and can run with as little as 512K ROM and 256K RAM. For network computers, an entire system with JavaOS, the HotJava™ Browser and space for downloading Web content and applets requires only 3MB ROM and 4MB RAM. JavaOS can be this small because it is almost completely written in Java.

JavaSoft, headquartered in Cupertino, CA, is an operating company of Sun Microsystems Inc. The company’s mission is to develop, market and support the Java technology and products based on it. Java supports networked applications and enables developers to write applications once that will run on any machine. JavaSoft develops applications, tools and systems platforms to further enhance Java as the programming standard for complex networks such as the Internet and corporate intranets.

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ChorusOS

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Web site: docs.oracle.com/cd/E19048-01/chorus5/index.html
Origin: USA
Category: workstation, embedded
Desktop environment: CLI
Architecture: x86, Motorolla 68000, PowerPC, SPARC, ARM, MIPS
Based on: Mach kernel
Wikipedia: ChorusOS
Media: Install
The last version | Released: 5.1 | 2011

ChorusOS – a highly scalable and reliable embedded operating system that has established itself among top telecommunications suppliers. The ChorusOS operating system is used in public switches and PBXs, as well as within access networks, cross-connect switches, voice-mail systems, cellular base stations, web-phones, and cellular telephones.

The Sun Embedded Workshop software provides a development environment with the necessary tools to build and deploy the ChorusOS operating system on a telecommunications platform. The ChorusOS operating system is the embedded foundation for Sun’s Service-Driven Network. Offering high service availability, complete hardware and software integration, management capabilities and JavaTM technology support dedicated to telecom needs, the ChorusOS operating system allows the dynamic and cost-efficient deployment of new features and applications while maintaining the reliability and functionality of existing networks.

The ChorusOS operating system supports third-party protocol stacks, legacy applications, and applications based on real-time and Java technology, on a single hardware platform.

The ChorusOS operating system can be tuned very finely to meet the requirements of a given application or environment. The core executive component is always present in an instance of the ChorusOS operating system. Optional features are implemented as components that can be added to, or removed from, an instance of the ChorusOS operating system.

Each API function in the ChorusOS operating system is contained in one or more of the configurable components. As long as at least one of these components is configured into a given instance of the operating system, the function is available. Some library functions are independent of any specific component and are always available.

ChorusOS 5.0 runs over Solaris operating environments, and supports the following targets:
– UltraSPARC II (CP1500 and CP20x0)
– Intel x86, Pentium
– Motorola PowerPC 750 and 74×0 processor family (mpc7xx)
– Motorola PowerQUICC I (mpc8xx) and PowerQUICC II (mpc8260) microcontrollers

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