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E-Risc
Project to design and implement scaleable RISC microprocessor for embedded applications. All architecture and source code to be released under GNU General Public License, or a slightly modified version that includes hardware, not only software.
http://www.geocities.com/SiliconValley/Chi...
CMOSexod.com
For advanced hobbyists: share free microprocessor and DSP IP cores written in Verilog or VHDL.
http://www.cmosexod.com/
The Freedom CPU
Mainly dedicated to purely SIMD superpipelined 64-bit RISC CPU, and the sources distributed under the terms of the GNU licence.
http://www.f-cpu.org/
picoJava Core
A core is the central component of a microprocessor or controller chip. Chips using picoJava core are ideally suited for consumer electronic products running Java applications. By Sun Microsytems, Sun Community Source License.
http://www.sun.com/microelectronics/picoJa...
Minimum Instruction Set Stack Microprocessor
FPGA based, single stack processor, development tools written in Java; download, documents. By Tomasz Sztejka. English and Polish.
http://www.dornet.pl/~sztejka/sztejkat/mis...
Google Groups: Free SPARC VHDL model available
Initial announcement of the GPLed LEON SPARC architecture.
http://groups-beta.google.com/group/comp.a...
STM
32-bit, 2-way superscalar RISC processor, designed in a HDL. Source downloads. This one is actually working.
http://www.asahi-net.or.jp/~uf8e-itu/
Press: Sun Extends Community Source Licensing to Chip Architectures
Sun Microsystems announces: for research uses, it extends its new Community Source Licensing model to picoJava and SPARC architectures; the first time a company made major microprocessor intellectual property available via open licensing.
http://www.sun.com/smi/Press/sunflash/9903...
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2006