This it is a message of Richard Staman creator of free softeare fundation and GNU on an idea to construct free hardware in FPGAs.
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Some nonfree architectures exist at the moment but it is known as a processor JAVA and Core of processor ARM work like in which I could run GNU/Linux in FPGA, like a Spartan3:
JAVA Processor
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Core ARM
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Microblaze
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The concept would be a free architecture in this implemented which drivers and some functions of DSP of, but for this could be to constuir a sintetizer with GPL