OHCI
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Open Host Controller Interface, or OHCI, are two open standards that allows a computer host to interact with FireWire and USB devices.
When applied to a FireWire card, OHCI means that the card supports a standard interface to the PC and can be used by the OHCI FireWire drivers that come with all modern operating systems. Because the card has a standard OHCI interface, the OS does not need to know in advance exactly who makes the card or how it works, it can safely assume that the card understands the set of well-defined commands that are defined in the standard.
The OHCI standard for USB cards work in the same way.
[edit] External links
- An OHCI for USB standard document from Compaq, Microsoft and National Semiconductor (PDF)
- An OHCI for 1394 (FireWire) specification from Intel
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