1. Arm architecture.
https://en.wikipedia.org/wiki/ARM_architecture
2. The coq proof assistant.
https://coq.inria.fr
3. Formalizing sparcv8 instruction set architecture in coq (project code).
https://github.com/wangjwchn/sparcv8-coq
4. Formalizing sparcv8 instruction set architecture in coq (technical report).
https://wangjwchn.github.io/pdf/sparc-coq-tr.pdf
5. Powerpc.
https://en.wikipedia.org/wiki/PowerPC