A question about the new HEMI and MDS

Hey everybody this is my first time posting at these forums, which are quite nice btw.

I've been reading up on the new HEMI quite a bit lately, more specifically MDS, but I haven't found out too much other than that it turns off 4 cylinders when the engine is not under load.

This question is more to satisfy technical curiousities more than anything. But I was wondering if MDS when activated (by that I mean 4 cylinders running, and four off) would cycle through the avaible 8 cylinders. By that I mean does MDS alternate which 4 cylinders recieve power during a stroke of the engine, or does the engine simply turn off the SAME 4 cylinders everytime MDS is activated.

Thanks for any insight
-Manris