Writing things chromatically is much different from composing with the chromatic scale. Most chromatic exercises are going to be in half step movements, but if you take the chromatic scale and write something with it, regardless of the types of steps you use, you're still being chromatic. For example, let's take a Slipknot "solo." They don't always move in half steps, but they aren't in any particular key. It's all chromatic. If you took a given Major scale, you wouldn't be obligated to constantly make whole step, whole step, half step, etc. movements for everything. It's the way it's used that makes it what it is. As I've learned in this debate, just because you don't start on A doesn't mean you can't still be playing in A Minor. So, just because it's not a half step doesn't mean it can't be chromatic.