I'd like an easy way to query, diagnose USB cords. They now contain their own chips. Right? So there's gotta be some kind of POST. Right? If so, I should be a

I'd like an easy way to query, diagnose USB cords. They now contain their own chips. Right? So there's gotta be some kind of POST. Right? If so, I should be able to ask the cord what it can do, if it thinks its broken, etc.