AGP BUS
In AGP bus interface, SiS315 implements full Side-band or pipeline command features of AGP 4X mode. One 16-stage command FIFO is implemented for reducing the latency time of AGP read access. The AGP interface is used by MPEG commands read, 3D engine texture read, 3D engine vertex data read and all 2D source data read. The AGP of SiS315 is properly designed to achieve up to 266 MHz AGP 4X clock for maximum 1000 MB/sec bandwidth.
3D Accelerator
Targeting on Microsoft Direct3D and OpenGL acceleration, SiS315 achieves extremely high fill and polygon rate in superior quality with high balanced pipeline 3D architecture. The major key technologies that guarantee a high 3D Performance are the integrated Command Queue, T&L Engine, Setup Engine, Texture Cache, and Pipeline Render Engine. The major technologies for the high performance and high quality 3D rendering in SiS315 are:

• Command Queu
• T&L Engine
• Setup Engine
• Texture Cache
• Pipelined Rendering Engine
• Command Queue in 3D Accelerator

Software Support
Following applications are currently supported:

• Microsoft Windows 95/98/Me
• Microsoft Windows NT Version 4.0 and Windows 2000
• Microsoft Windows XP

Current video operation supporting by software application are:
　

• Microsoft Video For Windows
• DCI driver
• Direct Draw driver
• Microsoft DirectX 8 WDM Driver

Current 3D operations supporting by software application are:
　

• Microsoft Direct3D for Windows 95,Windows 98,Windows Me and Windows 2000
• OpenGL in Windows 95, Windows 98,Windows Me and Windows NT
• Clear Z-buffer
• Full scene anti-aliasing Bitblt
• Video auto-flip with synchronous to 2D and 3D engines
• Capability for using AGP memory for all 2D commands