I have been trying to find valid source code download links for some of the old ATI tech demos and SDKs,
but everything seems broken:
TreasureChestWithSource.zip – Demo with source code
ATIOpenGLDemos.sit (9.4 MB)
Gl_sdk.zip from http://www.ati.com/developer/sdk/radeonsdk/Gl_sdk.zip
Rage128SDKSampleCodeandDemos from http://developer.amd.com:80/Resources/archive/legacydemos/Rage128SDKSampleCodeandDemos
I also tried reporting the broken links using 'Contact' details on AMD main site,
but got no response and obviously nothing was fixed.
If anyone has access to the above files it would be great if the code gets released on any file sharing site.