Fixing FireWire (IEEE 1394) Problems in Windows 10 and 11. Legacy Firewire Driver, Microsoft Firewire OHCI Legacy Drive, Firewire PCI and PCI E cards and how to install them. David Knarr
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IEEE 1394 - Wikipedia
Firewire 800 to 400 Adapter Male 9 Pin to Female 6 Pin IEEE 1394 a-b Converter | eBay