Keyboarding harder

Well, as foretold, I ended up going back into my mechanical keyboard firmware and setting up a mirrorboard implementation that’ll work on any computer. (This sounds impressive, but a lot of the functionality I needed was already sitting there dormant; it was mostly a matter of figuring out how to wire it together and getting the feel right.) It’ll even theoretically work for the right hand, but it’s gonna be a while til I can test that. 💀 I also took the opportunity to improve some of my earlier hacks, and I added some LED logic to expose the current state (I used to have just two modes, but now there’s effectively eight, so...), plus I had to fix some existing firmware bugs and backport some key features from upstream. Classic sidequest behavior. The situation here is that I have this keyboard called the Drop Alt; it has a lot going for it and can be programmed with an open firmware called QMK, but it turns out the (defunct) manufacturer sort of had a pattern of sloppy execution and…