VIA PM800 and PM880 IGP Chipsets
™
Delivering the Hi-Def
Visual Experience
Technology Brief
VIA Technologies, Inc.
February 20042
VIA PM800/PM880
Delivering the Hi-Def Visual Experience
Table of Contents
Introduction................................................................................................... 3
VIA PM800 and VIA PM880 Core Logic Overview........................................... 5
Advanced Memory Controller........................................................................5
High Performance CPU Interface...................................................................5
AGP 8X.....................................................................................................5
1GB/sec Ultra V-Link Chipset Interconnect.....................................................5
V-Map Modular Architecture.........................................................................6
VIA VT8237 South Bridge............................................................................ 8
VIA Drive Station Controller Suite.................................................................8
VIA Vinyl Multichannel Audio Suite................................................................9
VIA Advanced Connectivity Suite..................................................................9
S3 Graphics UniChrome™ Pro IGP Graphics Core ......................................... 10
2D/3D Engine............................................................................................ 10
2D Acceleration.........................................................................................10
3D Acceleration.........................................................................................11
Additional Gaming Features ...................................................................... 11
S3ConfigD3D Direct3D Configuration Utility...................................................11
Refresh Rate Override................................................................................12
Chromotion CE Video Display Engine............................................................ 13
Decoding: Flawless DVD Playback............................................................ 13
DVD Performance......................................................................................13
Rendering: Delivering Digital Content...................................................... 14
Adaptive De-Interlace Technique.................................................................14
Hardware Video De-blocking Filter ...............................................................16
Outputs: Delivering the Hi-Def Visual Experience...................................... 17
HDTV Support...........................................................................................17
Scanning: Interlaced vs. Progressive............................................................19
“Super” HDTV 1080p Format.......................................................................19
Advanced Support for Standard Televisions...................................................20
TV Flicker Filter.........................................................................................20
TV Display Scaling (Overscan/Underscan).....................................................21
TV Position and Color Adjustment Control .....................................................21
DuoView ..................................................................................................22
Hardware DuoRotate..................................................................................23
S3Gamma Plus..........................................................................................25
Media Center Features ...............................................................................25
Conclusion: A New Class of IGP Chipset....................................................... 26
Appendices
Appendix 1: 2D Performance Benchmarks .........................................................27
Appendix 2: 3D Performance Benchmarks .........................................................29
Appendix 3: VIA IGP Chipset Comparison Table..................................................31
Appendix 4: IGP Chipsets Comparison Table......................................................32
2
Copyright © VIA Technologies, Inc, 2004.
Third party brands and names are the property of their respective owner.3
VIA PM800/PM880
Delivering the Hi-Def Visual Experience
Introduction
There is a rapid change under way in PC usage, as more people are turning to their
PCs and notebooks for entertainment, such as watching movies, streaming video and
for displaying on larger and ever higher quality television sets. With the focus
increasingly on playing and managing digital media, the PC industry is being
compelled to develop products that more closely meet user demands for a better,
richer entertainment experience. In particular, the overall visual experience needs to
be enhanced at all levels, for powerful new Media Center PCs and small form factor
home entertainment systems alike, as well as for traditional mainstream desktop PCs
and notebooks.
This means that not only must a PC be able to play DVDs, but it also must be able to
process both Standard and High Definition digital TV signals, Internet video streams,
and the wealth of video content available that is specifically for the PC, such as
Microsoft® WMV HD or DIVx. Furthermore, the PC must be able to support the latest
HDTV formats and displays.
To meet these demands, Integrated Graphics Processors (IGP) need to move beyond
delivering excellent 2D and 3D graphics capabilities for everyday productivity
applications and gaming for mainstream PCs, and add a third dimension that enables a
stunning high definition visual experience, not only through CRT and LCD monitors but
also via television sets right up to next generation HDTVs.
As the first IGP chipsets to introduce a feature set aimed specifically at delivering an
unprecedented Hi-Def™ Visual Experience to the Intel® Pentium® 4 processor
platform, the VIA PM800 and VIA PM880 chipsets rise to this challenge by enriching
digital media consumption and offering support for the very highest definition digital
TV standards to meet the requirements of the rapidly emerging markets for HDTV-
ready Media Center PCs.
To enable this high definition support, the VIA PM800 and PM880 IGP chipsets
comprise two principal hardware sectors: VIA’s core logic technology and the S3
Graphics UniChrome IGP graphics core.
The core logic integrates all the key functions of a performance chipset North Bridge,
including the memory controller, the front side bus, and the graphics interface, and
paired with the leading VIA VT8237 South Bridge provides a comprehensive storage,
connectivity and multimedia feature set.
The new S3 Graphics UniChrome Pro IGP graphics core (“UniChrome Pro”)
provides the graphics and display performance features required by today’s and
tomorrow’s entertainment-oriented PC systems, comprising:
• A robust 2D/3D graphics engine that takes graphics data and turns it into
2D or 3D images, and
• The Chromotion CE Video Display Engine that raises the bar for digital
entertainment for all manner of PC systems.
3
Copyright © VIA Technologies, Inc, 2004.
Third party brands and names are the property of their respective owner.4

VIA PM880和PM800 (I/G)芯片组是由台湾 VIA Technologies, Inc.（威盛科技）公司研发的高性能主板控制芯片。这两款芯片组主要用于计算机主板上，提供对处理器（如Intel或AMD）的支持，以及集成图形处理、网络通信、存储控制器等多种功能。 "PM880"通常指的是适用于更高端市场的芯片组，可能包含更先进的图形处理单元(GPU)，支持DirectX 9或更高版本的游戏及高清视频解码，同时具备PCIe 2.0等高速接口，以满足多媒体应用和多任务处理的需求。 而"PM800 (I/G)"则可能代表一个基础型号或者中端市场的产品线，其中"I"可能代表整合(Integrated)了图形核心，意味着它将GPU的功能集成在一块芯片上，简化了PCB设计；"G"可能是Graphics的缩写，进一步强调其具备基本的图形处理能力，但可能不如同级别PM880那样强大。 总体来说，这两款芯片组是为不同性能需求和预算定位的主板提供技术支撑，用户可以根据自身项目或设备的具体要求来选择适合的芯片组产品。