HGC图形卡驱动程序的改进

ＨＧＣ图形卡驱动程序的改进贾克裕，子康四川大学数学系（６１００５４）本文分析了Ｂｏｒｌａｎｄ公司提供的ＨＧＣ驱动程序，提出了将其修改为支持６４０×４００分辨率模式的方法。ＨＧＣ图形卡即是Ｈｅｒｃｕｌｅｓ图形卡。这种图形卡既支持ＭＤＡ的文本显示功能，又...     

SuperVGA图形卡的BMP文件的快速显示

本文研究了三种最常用的ＳｕｐｅｒＶＧＡ图形卡ＴＶＧＡ，ＰＶＧＡ，曾氏（Ｔｓｅｎｇ）ＳｕｐｅｒＶＧＡ的分页映射机制及其在高分辨率下的１６色和２５６色ＢＭＰ图像文件的ＶＲＡＭ直接存取显示问题，并提供了ＤＯＳ环境下快速显示ＢＭＰ图像文件的方法。     

TVGA卡灰度编程实例

该文分析了高分辨率图形卡ＴＶＧＡ颜色寄存器的结构，由此得出，利用ＴＶＧＡ卡显示灰度图像，最多只能有６４级灰度，而不是２５６级，并给出了显示灰度图像的编程实例。     

高分辨率图形卡TVGA的全屏图形存储和恢复

本文对高分辨率图形卡ＴＶＧＡ的ＶＲＡＭ结构和映射方法进行分析；讨论全屏图形数据存储和恢复的基本方法；用ＴｕｒｂｏＣ语言实现了ＴＶＧＡ卡５ＦＨ模式全屏图形数据的存储和恢复     

高分辨率图形卡TVGA及交互配色的实现

本文介绍ＴＶＧＡ卡的ＶＲＡＭ结构及映射方法，研究Ｔｕｒｂｏ Ｃ语言与ＴＶＧＡ卡的彩色数模转换器ＤＡＣ硬件接口技术，用上述方法实现了ＴＶＧＡ卡５ＦＨ模式下图形变互配色的设计，文中给出了演示应用源程序。     

2000年,图形卡的竞争在软件

世界各生产厂商的图形卡是越来越强，各厂商都把他们在制造成本上的力气，开始转向了智力软件开发方面，而这种竞争更能体现厂商的实力。未来图形卡的竞争核心是：该显卡的视频ＢＩＯＳ和各种驱动软件是否能不断升级和更新。因为高版本的ＢＩＯＳ和各种驱动软件能让原来半年就淘汰的产品延长寿命，甚至能出现“枯木逢春，再现辉煌”的现象。著名的加拿大Ｍａｔｒｏｘ公司的Ｇ２００显示卡和Ｇ４００显示卡的发展过程就给了我们很好的启示。Ｇ２００显示卡在一年半前上市，至今仍然是销售走旺，不能不说是一个奇迹。是什么原因使Ｍａｔｒｏｘ…     

新品发布

Ｍａｔｒｏｘ发布最新的　Ｇ５５０图形卡　ＭｉｌｌｅｎｎｉｕｍＧ５５０图形卡的配备Ｇ５５０芯片，内置Ｍａｔｒｏｘ强力的头射引擎。头射引擎透过采用ＤｉｒｅｃｔＸ８端点着色架构，在低频宽网络联机环境下加速高分辨率，提供栩栩如生的人面动画。头射引擎支持网络视频通讯，加强了商业与娱乐应用如实时传讯、虚拟演示文稿和顾客关系管理。　ＭｉｌｌｅｎｎｉｕｍＧ５５０是双显示ＡＧＰ４Ｘ图形卡，内置３２ＭＢ　ＤＤＲ内存。图形卡包括一个组合的ＤＶＩ－Ｉ输出接口，在Ｗｉｎ２０００中有真正多重显示支持和最新的ｅ－双显示功能。…     

DELL工作站采用ELSA专业图形卡

ＤＥＬＬ工作站采用ＥＬＳＡ专业图形卡ＥＬＳＡＧＬｏｒｉａ－ＸＬ与ＤｅｌＷｏｒｋｓｔａｉｏｎ４００的超强组合，势必在ＣＡＤ／ＣＡＭ／ＣＧ市场抢占一席之地图形处理及数字通信业界的领导厂商艾尔莎（ＥＬＳＡ）日前表示，ＤｅｌＷｏｒｋｓｔａｔｉｏｎ４００专业工...     

扩展图形阵列XGA的软件仿真系统的设计

ＸＧＡ是为ＩＢＭ ＰＳ／２基其它以１３８６／１４８６为基础的微机系统提供高级图形和图象功能的新一代显示适配器和图形标准，本文首先简述ＸＧＡ的主要特征，随后详细论述了ＸＧＡ适配器接口软件仿真的设计思想及主要功能模块实现方法，最后对仿真系统用户接口的设计进行了讨论。     

扩展图形阵列XGA的软件仿真系统的设计

ＸＧＡ是为ＩＢＭＰＳ／２或其它以ｉ３８６／ｉ４８６为基础的微机系统提供高级图形和图象功能的新一代显示适配器和图形标准。本文首先简述ＸＧＡ的主要特征，随后详细论述了ＸＧＡ适配器接口软件仿真的设计思想及主要功能模块的实现方法，最后对仿真系统用户接口的设计进行了讨论。     

基于PC-104总线的CAN通讯卡的设计与实现

CAN总线是一种现场总线，特别适用于工业现场设备的网络通讯；PC-104总线是嵌入式PC机的总线标准，嵌入式PC机特别适用于工业现场控制。为了将嵌入式PC机联人CAN网络，设计了一种既具有CAN总线接口又具有PC-104总线接口的适配卡。给出了CAN通讯卡的硬件、软件设计思路与实现方法。该卡已在实践中得到应用，实践证明该设计方法是可行的。     

独立式多分辨率VGA/DVI压缩存储系统

一种独立式多分辨率VGA/DVI压缩存储系统,该系统支持VGA/DVI输入,同时支持SVGA、XGA、SXGA、UXGA、1080p等任意分辨率图像的连续压缩和存储.在100 MHz时钟频率下,系统可以对图像SXGA和UXGA实时压缩为(25帧/s)和(17帧/s).实验表明,在不同码率下,系统的单帧图像压缩性能与JP...     

Hardware support for adaptive tessellation of Bézier surfaces based on local tests

Bézier representations have been widely employed as a standard way of designing complex scenes with very good quality results. These surfaces are usually tessellated, in the software application, into triangle models to be rendered. Then, the final image is generated in the graphics card so that its triangle rendering capabilities are exploited.In this work we present an adaptive tessellation algorithm and the corresponding architecture to be implemented in hardware. The objective of the proposal is to avoid the potential bottleneck associated with the transmission of complex triangular models from CPU to graphics cards. The algorithm we propose is based on a layer strip representation method and a new data management that permits generation and efficient storage of the tessellated mesh. The corresponding architecture has to be included as an additional unit at the input of the graphics card. As a consequence, the transmission requirements from CPU to graphics card are greatly reduced as the tessellation is performed in the graphics card. On the other hand, the adaptive strategy employed permits selection of the number of triangles of the final mesh as a trade off between computational requirements and quality of the final mesh. The efficient data management proposed, together with the low storage requirements of the architecture, makes it a good candidate for its hardware implementation and inclusion in future graphics cards.     

Reality Augmentation for Medical Procedures: System Architecture, Single Camera Marker Tracking, and System Evaluation

Augmented Reality is an emerging technology that seeks to enhance a user’s view by overlaying graphical information. We developed a prototype AR system geared for medical applications. It is built around a stereoscopic head-mounted display of the video-see-through variety. The newest generation of this prototype system exhibits high performance on a standard PC platform. Stereoscopic video images are augmented with medical graphics in real-time at 30 frames per second and with XGA (1024× 768) resolution. The system provides a compelling AR perception: the graphics appears firmly anchored in the scene—there is no time lag between video and graphics or any apparent jitter of the graphics. With the head-mounted display, the user has a natural and direct access to understanding the 3D structure of the scene, based on both stereo and kinetic depth cues. In the present paper, we describe in detail the architecture and several features of the AR prototype system. Head tracking is accomplished with a single-camera system, with the dedicated tracker camera placed on the head-mounted display. This configuration is the foundation of achieving a high-accuracy graphics overlay. We are now exploring the use of the prototype system for a variety of medical applications. This paper gives an overview over the pre-clinical tests that we have performed for interventional guidance. Overall, the feedback has been very positive and encouraging, and we are continuing to work towards realizing the clinical potential of the technology.     

基于CAN总线的发动机测控系统接口通信卡的设计

本文阐述了基于CAN总线的发动机测控系统接口通信卡的开发，研制了CAN转RS-232接口卡．给出了详细的数据通讯接口转化卡电路图。实现PC机与电涡流测功器测控设备的数据通讯，转移了数据处理和在线分析的功能．有效提高了系统的控制精度。     

嵌入式系统的显卡方案设计

介绍具有面向微处理器的通用接口显卡系统,可使低速微处理器轻松驱动高分辨率显示器,且占用微处理器的时间极少。该方案以DDR SDRAM为显存存储图像数据,以FPGA为核心,控制并读/写显存中的数据,并将显存中的数据同步到液晶屏的驱动时钟下,形成持续的数据流,同时输出控制信号控制液晶屏的驱动,嵌入式微处理器仅需要在改变图像时输出数据,而不需持续输出驱动信号和数据流,从而大大降低嵌入式处理器的驱动负担。     

Computerized Mackworth vigilance clock test

A computerized vigilance test, the Mackworth clock test, is described. The program runs on IBM-compatible XT and AT computers with a graphics adapter.     

基于虚拟化的系统安全增强及显卡透传研究

针对个人终端操作系统安全问题,提出一种基于系统虚拟化技术的操作系统安全增强模型,研究提高该模型下KVM虚拟机显示性能的显卡透传技术。实验结果表明,显卡透传技术能够克服虚拟机客户操作系统的显示性能缺陷,使得客户机操作系统能够像真实操作系统一样满足图形显示与处理的应用,适用于终端安全领域。