where should I go to learn about advanced topics like driver development, memory mapping, etc? I do find some information in the net, but they are usually more theoretic and require that I already now how to do all this funky stuff... While the "standard" C documentation and especially my 600 pages of worthless crap (called a "book") don't even remotely touch those issues. I need something in between. Or just some place to ask dumb questions and actually get smart answers.
My main objective is the Hurd (GNU Mach), I would like to learn how to write or port graphics drivers (mainly VESA) for it and then create something like the framebuffer device for Linux. Probably to tough for me right now, but I finally have to start with something.