This page provides Pascal bindings for S3D, the proprietary API used by S3 Virge. The bindings have been tested with Delphi 2 and Free Pascal 2.2.4 (the last one to work under Windows 95). Also some API documentation is provided too. The bindings link against S3DTKW.DLL which should be part of S3 Virge drivers so no external requirements are needed.
You can also read the documentation online.