发明授权
- 专利标题: System of accessing data in a graphics system and method thereof
- 专利标题(中): 在图形系统中访问数据的系统及其方法
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申请号: US10075149申请日: 2002-02-14
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公开(公告)号: US07543101B2公开(公告)日: 2009-06-02
- 发明人: Milivoje Aleksic , Raymond M. Li , Danny H. M. Cheng , Carl K. Mizuyabu , Antonio Asaro
- 申请人: Milivoje Aleksic , Raymond M. Li , Danny H. M. Cheng , Carl K. Mizuyabu , Antonio Asaro
- 申请人地址: CA Markham, Ontario
- 专利权人: ATI Technologies ULC
- 当前专利权人: ATI Technologies ULC
- 当前专利权人地址: CA Markham, Ontario
- 代理机构: Vedder Price, P.C.
- 主分类号: G06F13/36
- IPC分类号: G06F13/36
摘要:
A central processor unit (CPU) is connected to a system/graphics controller generally comprising a monolithic semiconductor device. The system/graphics controller is connected to an input output (IO) controller via a high-speed PCI bus. The IO controller interfaces to the system graphics controller via the high-speed PCI bus. The IO controller includes a lower speed PCI port controlled by an arbiter within the IO controller. Generally, the low speed PCI arbiter of the IO controller will interface to standard 33 MHz PCI cards. In addition, the IO controller interfaces to an external storage device, such as a hard drive, via either a standard or a proprietary bus protocol. A unified system/graphics memory which is accessed by the system/graphics controller. The unified memory contains both system data and graphics data. In a specific embodiment, two channels, CH0 and CH1 access the unified memory. Each channel is capable of accessing a portion of memory containing graphics data or a portion of memory containing system data.