I think it's worth adding though - articles like these aren't kernel's, they're just programs running on the bare-metal. This stuff (booting the computer and ge

I think it's worth adding though - articles like these aren't kernel's, they're just programs running on the bare-metal. This stuff (booting the computer and getting to a sane environment) is really the easy part, designing the kernel and creating the kernel's facilities that it provides to programs is the bulk of the work when writing a kernel/OS. That's not to say these articles are bad, they're still fun, but it's like having a "simple emulator in 24 hours" that just sets up a simple GUI and doesn't actually start designing the emulator. It's technically the start of an emulator, but while that part might actually be complicated it's still not really that relevant to designing an emulator.