I've thought about a variant of this with Baking Pi [1]. That takes you through assembly to the point of having a Raspberry Pi with a minimal terminal (with jus

I've thought about a variant of this with Baking Pi [1]. That takes you through assembly to the point of having a Raspberry Pi with a minimal terminal (with just an external USB driver the author wrote). I think it would be interesting to see how quickly you could get from there to a useful system, say one where you could download the USB driver from github and compile it. But I definitely don't know enough to do that. [1] https://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/os/ https://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/os/