Does ISA ownership matter? A Tale of Three ISAs

An instruction set architecture (ISA) is crucial to the development of processors and their software ecosystems. Does ISA ownership matter? Let’s consider three proprietary ISAs and their history to find out.

Open Source vs Commercial RISC-V Licensing Models

Everybody is familiar with commercial licensing from traditional processor IP vendors. In discussing RISC-V, there is widespread confusion of terminology with RISC-V often being described as “open source”, often understood as “free”. But what is reality?