7,723 karma · joined September 2, 2014
You can certainly get Power cores with the VHDL and everything; the most notable of these is Microwatt, and IBM even maintains it. There are also A2O and A2I.
That said, I don't think it's reasonable to expect that a company that put R&D money into designing a high performance chip should give away the store. There has to be some incentive. I'm satisfied that I don't have any unexplained or opaque firmware blobs in my POWER9 chips and the ISA and its internal workings are well-documented. That was good enough for the FSF, and it's good enough for me.
That SL2 went from California to Maine, down to Georgia and back to California. It never had any dings and had only a few scratches in the paint. My Civics seem to get dinged if you look at them wrong.
I wish I could have said the same about the Saturn's stickshift, though. That actually fractured when I was in Gilroy. I mean, the shaft literally snapped.
The microarch is closed and IBM-specific. However, the ISA is open and royalty-free, and the on-chip firmware is open source and you can build it yourself. In this sense it's at least as open as, say, many RISC-V implementations.
They aren't cheap and they aren't for everyone. But it meets my needs and it puts my money where my mouth is.
You may be thinking of IBM i (formerly known as AS/400 and i5), which has a completely abstracted instruction set that on modern systems is internally recompiled to Power.
Of the Burbank, Fountain Valley, San Marcos, San Diego, Anaheim Hills, Roseville, Sacramento, Fremont, Las Vegas and Sunnyvale locations, I think I liked the San Diego one most for selection (it was a former Incredible Universe), but the Roseville and Las Vegas ones had the wildest themes, even more than the Burbank UFO. But the Fremont location when I ended up there in 2019 was deader than a doornail, and it was like waiting for the next hit to kill them. The next hit came sooner than I thought.
gopher://gopher.floodgap.com/1/archive/userserve-ucsd-edu
On Android I use Fastmail's mobile client, but I'm thinking of trying the new mobile Thunderbird there too.