Where do Computer Engineering/Science differ

I'm currently a sophomore CS major(a semester behind because I decided I hated chemistry and was only doing pharmacy for money) and still unsure of where I should be in terms of focus. My interest is primarily in low level software like Operating Systems and embedded systems. Am I right in choosing to pursue a CS degree? I have no interest in hardware and my ideal job would be writing low level software for embedded devices like cell phones or consoles. If CS isn't the ideal choice how far off is it? Is someone with a masters degree in CS able to jump into an embedded systems job depending on the focus?

At the University that I'm attending, this is how it breaks down, essentially: Computer Engineering is an Electrical Engineering minor mashed with a Computer Science minor. You do a little of both, and such at both. That's my experience, though. Universities differ.