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显示卡作为PC的组成部分,在整机的性能里起着越来越重要的作用。几年前的PC以处理字符为主,图形的处理能力并不重要,通常配备的是ISA总线的显示卡;随着Windows的风行,平面(2D)图形处理能力越来越重要,ISA总线之后又出现了VESA总线的显示卡,目前的主流则是PCI总线2.0版的产品。CPU速度不断提高,多媒体的广泛应用,PCI 2.0总线也将不能应付。正在这时Intel公司联合其它厂商适时推出了AGP(加速图形端口)技术,代表着下一代的图形总线技术,目标是承担未来以3D图像处理为主流的显示任务。 AGP技术的基础是2.1版的PCI规范,总线宽度由原来的33MHz提高到66MHz,另外又通过增加边带(SideBand)信号扩展了PCI规范,实现了流水线式内存读
Graphics card as part of the PC, the machine’s performance plays an increasingly important role. A few years ago the PC to deal with the main character, graphics processing power is not important, usually with the ISA bus graphics card; with the popular Windows, graphics (2D) graphics capabilities become more important, ISA bus There have been VESA bus graphics card, the current mainstream PCI bus 2.0 version of the product. CPU speed continues to improve, the widespread use of multimedia, PCI 2.0 bus will not be able to cope. At this moment, Intel Corporation and other vendors timely introduced AGP (Accelerated Graphics Port) technology, representing the next generation of graphics bus technology, the goal is to assume the future to 3D image processing as the mainstream display tasks. AGP technology is based on the PCI specification of version 2.1, increasing the bus width from 33 MHz to 66 MHz and extending the PCI specification by adding SideBand signals to achieve a pipelined memory read