I always thought the ideas from the Mu project were interesting, not sure about its current status as I haven't seen Mu or Akkartik on HN for a while.
But I'm still open to jamming on Mu with somebody who knows more about OS development. Things like programming the PIC (https://en.wikipedia.org/wiki/Programmable_interrupt_control...) or testing against real hardware. For example, I'm kinda at an impasse with https://github.com/akkartik/mu/issues/52 and would really appreciate some advice from an expert.
I haven't done OSdev in 20+ years (https://github.com/1player/klesh), but I hope I can set aside some time to dive into mu seriously and maybe pick your brain a bit :) keep up the good work!