TAYRA - A 3D Graphics Raster Processor

Abstract

This paper describes the Junctionality oj a 3D Graphics Raster Processor called TAYRA. TAYRA consists in the most part oj Graphics Raster Pipeline with five major external interfaces: PCI Master/Target, Depth, Texture, Colour and Video Interfaces.The Graphics Raster Pipeline perform'S' all the major OpenGL style (not necessarily compliant) raster functions: scan conversion; lines, spans, triangles, rectangles, perspective correction o f texture coordinates. mip map jevel selection, and many other texture modes, alpha blending, and other Junctionalities. Further, through TAYRA's fast host to buffer access mechanisms it can do advanced stencilling, multi-pass antialiasing, and other algorithms; all accelerated in hardware with a sustained pixel write speed of 29 MPixels/sec (peak of 33 MPixels/sec). This translates to a peak 25 pixel triangle drawing speed of 890K Triangles/sec, limited bv PCI bus bandwidth.