Update:

> https://github.com/antonblanchard/microwatt
[...]
> Edit: Chiselwatt by the same author, but written in Chisel

IBM has opened the A2 core:

https://github.com/openpower-cores/a2i
https://git.openpower.foundation/cores/a2i

"“A2I has demonstrated it’s durability over the last decade – it’s a powerful technology with a wide range of capabilities,” said Mendy Furmanek, President, OpenPOWER Foundation and Director, POWER Open Hardware Business Development, IBM. “We’re excited to see what the open source community can do to modernize A2I with today’s open POWER ISA [...].”"
https://openpowerfoundation.org/a2i-power-processor-core-contributed-to-openpower-community-to-advance-open-hardware-collaboration/

"Modernizing" a Book III-E core into something that was called Book III-S in PowerISA <3.0? I'm not sure this is technically feasible. Why am I not surprised that Furmanek proposes this (see comment #163)?


Edit: slides and video from OpenPOWER Summit NA 2020
Edit2: added link to another repository

[ Edited by Andreas_Wolf 28.07.2021 - 20:17 ]