Host controller interface

Open Host Controller Interface ( OHCI ) is an open standard that allows a computer to communicate with FireWire and USB devices.

In terms of FireWire cards and controller chips OHCI means that the card / chip supports a PCI-based standard interface that can be used by OHCI Firewire drivers, as they offer all modern operating systems. Through the standard interface, the operating system does not need to know details of the controller, but can talk to him with a set of well-defined instructions.

Technical standard IEEE 1394 Controller (computing)
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