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DirectX 9 for SiS

DailyTech previously reported on SiS’ 2006, 2007 core logic roadmap. The previous roadmap outlined plans for upcoming SIS 671/671FX and 771 chipsets for Intel and AMD processor architectures. Both chipsets feature an integrated SiS Mirage 3 graphics core with DirectX 9 compatibility and expected to launch this quarter. A new SiS roadmap reveals greater details of the upcoming integrated graphics core.

The usual DirectX 9 and OpenGL 1.5 3D APIs are supported with the Mirage 3 graphics core. There will only be support for Pixel Shader 2.0 instead of Pixel Shader 3.0 supported by Intel’s upcoming Graphics Media Accelerator X3000, ATI’s Radeon Xpress 1250 and NVIDIA’s GeForce 6100 series. Up to 16 texture units are available though. No vertex shader is present on the Mirage 3 graphics core disappointingly. Nevertheless the Mirage 3 graphics core has an integrated transform and lighting engine which is quite common nowadays. The graphics engine clock is expected around 250 MHz.

While the graphics core won’t exactly keep up with the latest value graphics cards from ATI or NVIDIA it does have plenty of video processing features. Notable video features include pixel scaling capabilities up to 1920x1200 pixels via a 6x4 scaling algorithm and motion adaptive deinterlacing algorithms. The SiS Mirage 3 also features smoothing algorithms that smooth out jagged edges and lines in videos. 3:2 pull down detection is also supported for progressive MPEG2 video playback.

The SiS Mirage 3 graphics core is expected to enter mass production in SiS 671, 671FX and 771 chipsets this month. Expect motherboards feature the chipset to arrive in the upcoming months with prices below $100. SiS Mirage 3 graphics powered chipsets will support Microsoft’s upcoming Windows Vista with aero glass user interface.





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