Hardware Documentation - Busses - IEEE 1394
IEEE 1394 is a set of standards which specify a high-speed serial bus comparable to USB. It was developed in the late 1980s and early 1990s by Apple as Firewire. Other names for the standards include i.Link and Lynx.
-
1394 Trade Association Specifications
Note that this doesn't include the actual IEEE1394 spec; just additions and revisions, especially for various peripherals.