The Open Host Controller Interface (OpenHCI) Specification for the Universal Serial Bus is a register-level descr iption of a Host Controller for the Universal Serial Bus (USB) which in turn is described by the Universal Serial Bus Specification, so
1394规范，The 1394 Open Host Controller Interface (Open HCI) is an implementation of the link layer protocol of the 1394 Serial Bus, with additional features to support the transaction and bus management layers. The 1394 Open HCI also includes DMA engi
