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    POINT-TO-POINT BUS BRIDGING WITHOUT A BRIDGE CONTROLLER
    2.
    发明公开
    POINT-TO-POINT BUS BRIDGING WITHOUT A BRIDGE CONTROLLER 有权
    POINT-TO-POINT桥梁BUS无桥控制

    公开(公告)号：EP1738275A1

    公开(公告)日：2007-01-03

    申请号：EP05739938.8

    申请日：2005-04-22

    申请人： NVIDIA Corporation

    发明人： RUBINSTEIN, Oren ,  ALBEN, Jonah, M. ,  HUANG, Wei-Je

    IPC分类号： G06F15/80 ,  G06F13/14

    CPC分类号： G06F3/14

    摘要： A computer system includes an integrated graphics subsystem and a graphics connector for attaching either an auxiliary graphics subsystem or a loopback card. A first bus connection communicates data from the computer system to the integrated graphics subsystem. With a loopback card in place, data travels from the integrated graphics subsystem back to the computer system via a second bus connection. When the auxiliary graphics subsystem is attached, the integrated graphics subsystem operates in a data forwarding mode. Data is communicated to the integrated graphics subsystem via the first bus connection. The integrated graphics subsystem then forwards data to the auxiliary graphics subsystem. A portion of the second bus connection communicates data from the auxiliary graphics subsystem back to the computer system. The auxiliary graphics subsystem communicates display information back to the integrated graphics subsystem, where it is used to control a display device.

    GPU RENDERING TO SYSTEM MEMORY
    4.
    发明公开
    GPU RENDERING TO SYSTEM MEMORY 有权
    GPU播放系统内存

    公开(公告)号：EP1741089A2

    公开(公告)日：2007-01-10

    申请号：EP05739859.6

    申请日：2005-04-26

    申请人： NVIDIA Corporation

    发明人： RUBINSTEIN, Oren ,  REED, David, G. ,  ALBEN, Jonah, M.

    IPC分类号： G09G5/39

    CPC分类号： G09G5/395 ,  G06F12/0207 ,  G06F12/0875 ,  G09G5/393 ,  G09G2360/122 ,  G09G2360/125

    摘要： A graphics processing subsystem uses system memory as its graphics memory for rendering and scanout of images. To prevent deadlock of the data bus, the graphics processing subsystem may use an alternate virtual channel of the data bus to access additional data from system memory needed to complete a write operation of a first data. In communicating with the system memory, a data packet including extended byte enable information allows the graphics processing subsystem to write large quantities of data with arbitrary byte masking to system memory. To leverage the high degree of two-dimensional locality of rendered image data, the graphics processing subsystem arranges image data in a tiled format in system memory. A tile translation unit converts image data virtual addresses to corresponding system memory addresses. The graphics processing subsystem reads image data from system memory and converts it into a display signal.