While browsing the PlanetAMD64 forums, I came across a thread where someone had ported open source BT8x8 drivers to Windows XP x64 Edition.
I used the 64-bit driver file to update my STB TV PCI drivers. Even though I had an issue with DScaler giving me an error under Windows XP x64, the BT8x8 driver seemed to work just fine, and I was able to watch TV!
You can download the 64-bit STB TV PCI drivers from my drivers page HERE.
Yes, I’m still using my STB TV PCI after 10 years. The card was released in 1996 by the long dead company STB.