OpenPOWER now even more open (mimicking RISC-V and MIPS Open):

"With IBM announcing new contributions to the open source community including the POWER Instruction Set Architecture (ISA) and key hardware reference designs at OpenPOWER Summit North America 2019, the future has never looked brighter for the POWER architecture. [...] By moving the POWER ISA under an open model [...], we’ll enable innovation in the open hardware and software space to grow at an accelerated pace. [...] In addition to open sourcing the POWER ISA, IBM is also contributing a newly developed softcore to the community. In a very short time, an IBM engineer was able to develop a softcore on the POWER ISA, and get it up and running on a Xilinx FPGA."
https://openpowerfoundation.org/the-next-step-in-the-openpower-foundation-journey/

Excellent articles on the matter, with almost no factual errors:
https://www.eejournal.com/article/ibm-gives-away-powerpc-goes-open-source/
https://www.itjungle.com/2019/08/26/what-open-sourcing-powers-isa-means-for-ibm-i-shops/
https://lwn.net/Articles/796796/
https://www.devever.net/~hl/opening-power


Edit: added links to articles
Edit2: added more links to articles

[ Edited by Andreas_Wolf 30.09.2019 - 17:42 ]