Firewire Device ID

Hello!

A firewire device (I work primarily with DV cameras) sends a unique (per device) ID string embedded in the firewire data.

Within this string there evidently is information about the vendor.
When connecting a DV camera to an XP computer, XP will display the vendor (Sony, Panasonic etc) below the small icon that pops up in "my computer".

I have been looking for information about how to extract vendor info (and possibly other interesting stuff) from the ID string but have failed.

Possibly one could "reverse engineer" this, (I could contribute some known ID:s) but it is of course preferable to write some code based on the specs.
Maybe they are to be found in the "blue book"? (which I never managed to lay my hands on...)
Anyone with info on this?

Tia,

Johan Stäck
Skellefteå
Sweden
.

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