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The Freedom CPU - http://f-cpu.seul.org/
F-CPU, mainly dedicated to pure SIMD superpipelined 64-bit RISC CPU, and the sources. Open Source, GPL. |
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CMOSexod.com - http://www.cmosexod.com/
For advanced hobbyists: share free microprocessor and DSP IP cores written in Verilog or VHDL. |
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http://www.asahi-net.or.jp/~uf8e-itu/ - http://www.asahi-net.or.jp/~uf8e-itu/
32-bit, 2-way superscalar RISC processor, designed in a HDL. Source downloads. This one is actually working. |
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Zet Processor - http://zet.aluzina.org/
An open implementation of IA-32 architecture which is also called x86. Includes documentation, screen shots and a forum. |
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Open Source Soft Microprocessors - http://www.ddj.com/linux-open-source/197800817/
Free licensing of soft microprocessors lets designers easily modify FPGAs and gives greater visibility into architectures; explains implications of associated licensing models. Dr. Dobb's. |