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Does ISA Ownership Matter? A Tale of Three ISAs | Roddy Urquhart

By December 22, 2020January 4th, 2021No Comments

An instruction set architecture (ISA) is crucial to the development of processors and their software ecosystems. In the last half century, the majority of ISAs have been owned by single companies, whether product companies for their own chips/systems or processor IP companies who licensed their processors to chip developers. Does ISA ownership matter? Let’s consider three proprietary ISAs and their history.

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