11-10-2013, 05:25 AM
If you want you can check out my video on them, it explains them briefly. You should have at least somewhat of an understanding of adders and logic though, or you won't understand any of it.
http://www.youtube.com/watch?v=CtHQ6HQvu7Q
http://www.youtube.com/watch?v=CtHQ6HQvu7Q