Since the last post here I've taken to a bit of further hardware hacking and most of this is recorded on Hackaday https://hackaday.io/johnlon
The CPU project I started in 2019 is called SPAM-1 and is still underway but it's taken on a bit of a life of it's own. More info on that can be found in it's github repo https://github.com/Johnlon/spam-1