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http://www.overwhelmed.org/shawn/
Sure as Hell Ain`t Windows Ninety five, the corner cutting OS due to the original schedule. Always intended more as a learning experience for author and others than as a practical, useful OS. Everything done as simply as possible. [Open Source, GPL]
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http://www.geocities.com/sunriseos/
Tiny operating system written in Assembly, via NASM, by ICT student. Meant for only fun and learning. [Open Source]
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http://inf4serv.rug.ac.be/~fcorneli/eduos/
Operating system for the IA-32 (80386+) processors. For education purposes only, includes full source code, under active development. Needs Linux or BeOS to be compiled. [Open Source]
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http://kos.enix.org/
Kid Operating System. Modular (run-time dynamic linking), preemptive multitasking, to have SVR4-like VM. Begun 1998 by young programmers, most of them students. Goal: not obtaining OS, but learning OS internals and functioning of x86 processors. Downloads, links, documentation. [Open Source, GPL]
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http://scottie.20m.com/
Scott Billingsley`s OS: realtime for DSP and amateur radio, one user/application, 16-bit real mode, for i386+, FAT 12/16; no TSRs, library of routines to program into apps, minimal kernel support (minimize interrupts), written in NASM assembly and Sphnix C--.
Keywords: freebsd, homepage, packet, thinkpad
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http://cq-pan.cqu.edu.au/david-jones/Projects/rcos/
Ron Chernich`s OS: computer learning tool animates operation of multi-tasking OS; true OS, runs programs; object-oriented, message passing kernel lets parts be replaced easily, C++ coded, portable, runs on DOS, RCOSjava precursor.
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http://www.tik.ee.ethz.ch/~topsy/
Teachable Operating System: tiny multithreaded messaging microkernel, in ANSI C; protected threads, memory managed, and thread/process control. From undergraduate course on concurrency, device programming, OS concepts. Descriptions, documents, theses, downloads, contacts, links. [Open Source, GPL]
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http://www.cs.washington.edu/homes/tom/nachos/
Not Another Completely Heuristic Operating System: teaching OS coded in C++ subset, developed at UC Berkeley for OS and Systems Programming classes; now used worldwide. Descriptions, FAQ, port and bug lists, assignments, downloads. [Open Source]
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http://www.cs.virginia.edu/~bah6f/nachos486/
Port, extension of instructional OS, now stand-alone, protected mode, multithreaded, compiles in FreeBSD to run on i486+, can be relinked without recompile. Descriptions, report (HTML, PDF, PS), download. [Open Source]
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http://www.lostcommunity.org/
A command-line OS written in x86 assembly, designed as a learning tool for college students and amateur programmers. Download available. [Open Source]
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