Θ Computers: Software: Operating_Systems: Realtime: Nucleus

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Accelerated Technology, ESD Mentor Graphics Makes Nucleus RTOS; full source code, no royalty, preemptive, multitasking, for time-critical embedded uses; coded 95% ANSI C, very portable, runs on most processors, Nucleus micro-iPLUS has uITRON interface; code|lab IDE, Microtec C/C++ compilers, XRAY debugger and developer kit, QuickStart Kit.
Nucleus RTOS Integrates with USB Package Accelerated Technology, and MCCI integrate Nucleus RTOS and protocol stacks from Mentor Graphics with MCCI USB Data Pump firmware package for multifunction USB peripherals such as keyboards, joysticks, printers. [Embedded.com]
Insignia and Accelerated Technology Announce Licensing Agreement to Include Secure System Provisioning Client Software with the Nucleus Operating System Lets phones using Nucleus RTOS be repairable and upgradeable over-the-air. [EDACafe.com]
Embedded Company: Accelerated Technology Describes firm and product (Nucleus), with related links. [Embedded Star]
Nucleus RTOS No royalty, wide range modular products: kernels, network stack and management, internet connectivity, Java support, terminal application, C++, profiling, prototyping. By Mentor Graphics Corp.
Nucleus RTOS Growing article, with links to many related topics. Wikipedia.