Writing simple app in linux to access IO port

Check out and google "IO permission map in Linux"

More info to come

How is *.patch file created

If you guys were looking for how patch file was created or perhaps curious how are patch file created. It's by running the "diff" tool. Here's an interesting site:

http://linux.byexamples.com/archives/163/how-to-create-patch-file-using-patch-and-diff/