I'd like to know more about the operation of the lines of a CPU's pinout, such as /CLK, /RW, /D0-D7, etc., including what physically happens and what each possible variation (such as tristate) are. Is there a place I could learn this online for free? Because I'm not exactly sure what this is called, I'm stuck as far as Googling goes... Or is there some book? Should I just leanr it in college? Thanks.