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→Buffer descriptor C "ReceiveList"
If it has value 0, the C descriptor functionality is disabled. If it has value 1, there is no C descriptor. If it has value 2, there is a single C descriptor.
If it has value 0, the C descriptor functionality is disabled. If it has value 1, there is no C descriptor. If it has value 2, there is a single C descriptor.
Otherwise it has (flag-2) C descriptors.
Otherwise it has (flag-2) C descriptors. Note that flag=2 and flag=3 both encode a single C descriptor.
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