I want to know the answer to the following question:
How many bits of control flags did USB 2.0 add?
All the background I'm provided with is that "Rather than tie up the high-bandwidth USB bus sending data to a slower USB device, the nearest high-bandwidth capable hub receives a SPLIT token followed by one or two USB packets at high bandwidth, performs the data transfer at full or low bandwidth, and provides the response at high bandwidth when prompted by a second SPLIT token.". Is that enough to answer the question?
Answer: no