Almost every framework does MVC differently, so you might end up getting even more confused. The general principles of MVC are very simple: “Model is state; view reacts to model; controller reacts to view; controller changes model”. The model, view and controller are concepts – they are whatever you feel them to be. Classes, bunches of classes, instances of classes with XML configuration files, you name it.
I actually think that about covers the basic principles. Without a framework, you’d not get much further. What matters is how a particular framework defines model, view and controller and their interactions.