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Microkernel:
See also:
 E.R.I.K.A. - Microkernel RTOSs and set of integrated tools to develop embedded realtime applications, made to support all architectures used in power train controllers in automotive industry. Kernels have 2 main layers: Kernel Layer, Hardware Abstraction Layer, HAL. Open Source, GPL ERIKA Enterprise - Embedded RTOS for single and multi-core uses, small size, supports advanced scheduling mechanisms for stack size reduction on multiprocessor chip systems. Commercial. Evidence S.r.l. Phoenix-RTOS - Goals: develop free, portable, small, well-designed RTOS for embedded hardware platforms: SBC (Single Board Computers), SOM (System on Module), SoC (System on Chip). Free. Phoenix-RTOS - Growing article, with links to many related topics. Wikipedia. PikeOS - Uses virtualization to protect software investment long-term; implements multiple software partitions on one CPU, strictly separated, each partition can run full OS such as Linux, POSIX, OSEK, or programs. Sysgo AG; Mainz, Germany. Prex - Portable, small, realtime microkernel 32-bit OS for embedded systems, coded in C, POSIX emulation layer. Open source, BSD. Real-Time Mach NTT - Another version of Real-Time Mach, by NTT Laboratories. Contains RT-Mach kernel, FreeBSD 2.2.8 server, real-time shell, RT-Java, Hurd loader. Getting Started section: readme, release notes, installation, hardware, compatibility, troubles questions and answers, and contacts. rtmk - Realtime microkernel: preemptive, fully re-entrant, multithreaded, SMP, continuations, full locking primitives; shares many ideas with Mach, developed by CMU in late 1980's, early 1990's, stopped in 1994. Open Source, GPL Sphere SP - A modular RTOS suitable for embedded systems, scalable from tiny stand-alone microkernel up to full client/server OS, supports different processors. "Spring Operating System") Spring Operating System - Growing article, with links to many related topics. Wikipedia. An Overview of the Spring System - Description of realtime microkernel and integrated environment, designed and implemented to support/provide predictability, guarantees (on-line dynamic, atomic), end-to-end scheduling, resource reservations; supports call/task admission model; and multiprocessors. Proceedings of Compcon. (February, 1994)Suggested link
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