| http://www.w3.org/ns/prov#value | - The host controller is the host side hardware which supports USB. For USB 1.1 (there was a 1.0 standard, but it is broken and hasn't been used in years) there was OHCI and UHCI. For USB 2.0, there is EHCI. You can not run USB 2.0 on an OHCI or EHCI HCD. You can not run USB 1.1 on an EHCI HCD. So how does backward and forward compatibility work?
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