This part is a kind of semiconductor called RIVA128.

Function of this product has RIVA 128 128-BIT 3D MULTIMEDIA ACCELERATOR.

Manufacturers : STMicroelectronics

Image and pinout :

Some of the text within the PDF file :

® ™ RIVA 128™ 128-BIT 3D MULTIMEDIA ACCELERATOR DESCRIPTION The RIVA 128™ is the first 128-bit 3D Multimedia Accelerator to offer unparalleled 2D and 3D performance, meeting all the requirements of the mainstream PC graphics market and Microsoft’s PC’97. The RIVA 128 introduces the most advanced Direct3D™ acceleration solution and also delivers leadership VGA, 2D and Video performance, enabling a range of applications from 3D games through to DVD, Intercast™ and video conferencing. KEY FEATURES • Fast 32-bit VGA/SVGA • High performance 128-bit 2D/GUI/DirectDraw Acceleration • Interactive, Photorealistic Direct3D Acceleration with advanced effects • Massive 1.6Gbytes/s, 100MHz 128-bit wide frame buffer interface • Video Acceleration for DirectDraw/DirectVideo, MPE [ ... ]

RIVA128 PDF Datasheet Download