I have an acer aspire es1-521 laptop and i installed windows vista but there is no amd radeon r2 driver. I tried to install the driver from Windows 7 but it didn’t work. Can you make a modified amd radeon r2 driver to run windows vista if you can solve the problem.
Try these: https://www.amd.com/en/support/graphics/amd-radeon-hd/amd-radeon-hd-8000-series-oem/amd-radeon-hd-8470
They support XP up to Windows 10. Another option you could try is to procure a newer AMD laptop, such as the Acer Aspire A315-21 with Stoney Ridge from 2019, and run Windows Vista from there. The AMD Graphics driver for Stoney Ridge is now Vista capable, but is not ready for public consumption yet.