This is the radeon 8500 driver and bios page

Radeon 8500 bioses This zip contains radeonflashv201, radeditv1.1, bioses and info on bioses

Sapphire Radeon 9800pro XT 256Mb bios (23/10/03) and universal flasher with usage examples

Get the latest drivers from official ati website

Radeon 8500 links concerning bioses and info

Omega drivers and bioses for 8500

If you think there may be some new drivers or updates to your favorite programs then a good place to look is here.

If I find anything else of interest then I will post it here too.