Where can I find new drivers for my cirrus logic video card?

One of the last video cards from Diamond before their several-year leave from the market was the Diamond Viper II. This card was highly anticipated as it came after the grand merger between S3 and Diamond. The Viper II was based upon the S3 Savage 2000, a supposed Geforce-killer. Unfortunately the chip itself was badly unfinished silicon and the drivers were a disaster. In fact, the card could really only run two games perfectly: Quake 3 Arena and Unreal Tournament. The much-touted S3TL transform & lighting engine was completely non-functional at release. Registry tweaks to enable it showed extreme bugs and distortions with it enabled, and lower overall performance. Drivers were updated for a few months after release, but the card was quite quickly abandoned. Needless to say it was not great competition for the juggernaut nVidia had turned into.