I thought this was pretty illustrative. For example you can see how you have a cam lobe to actuate the intake rocker and a cam lobe to actuate the rocker for the exhaust valve. As they say, sometimes a picture is worth a thousand words.
Thanks guys Howstuffworks has some stuff like this, but obviously not a 930 engine. And also, this is obviously still just a partial picture, but still I also thought it was pretty cool.
Thank you for moving the thread Siko I don't know what I was thinking....