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    • 3. 发明授权
    • Information processing apparatus and method therefor
    • 信息处理装置及其方法
    • US06963938B2
    • 2005-11-08
    • US09939806
    • 2001-08-28
    • Naohisa SuzukiAtsushi Nakamura
    • Naohisa SuzukiAtsushi Nakamura
    • G06F13/14G06F9/445G06F12/06G06F13/00H04L12/44
    • G06F9/4411
    • If a block read cannot be used to read out from a configuration ROM information, the number of times of issue of a quadlet read request increases. This degrades the processing efficiently of a device that issues the request. In addition, the bus occupation ratio of a 1394 serial bus by the request becomes high, and the speed of processing through the 1394 serial bus decreases. To solve these problems, information stored in the configuration ROM area of a device is read out, and it is determined on the basis of the readout information that configuration information identical to the configuration ROM information is stored in an address area (block readable area) different from the configuration ROM area, the offset is changed, and the configuration information is read out from the address area different from the configuration ROM area.
    • 如果块读取不能用于从配置ROM信息中读出,则发送四字节读取请求的次数增加。 这会降低发出请求的设备的处理效率。 另外,请求的1394串行总线的总线占用率变高,通过1394串行总线的处理速度降低。 为了解决这些问题,读出存储在设备的配置ROM区域中的信息,并且根据读出的信息确定与配置ROM信息相同的配置信息存储在地址区域(块可读区域)中, 与配置ROM区域不同,偏移被改变,并且从与配置ROM区域不同的地址区域中读出配置信息。