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    • 16. 发明授权
    • Computer system with enhanced docking support
    • 具有增强对接支持的计算机系统
    • US6145029A
    • 2000-11-07
    • US42327
    • 1998-03-13
    • Todd DeschepperPaul Stanley
    • Todd DeschepperPaul Stanley
    • G06F13/40G06F13/14
    • G06F13/4027
    • A computer system including a programmable bridge logic device to disable various peripheral device functions is disclosed. The bridge logic device preferably includes an address decoder and one or more peripheral bus controllers. The address decoder preferably includes a configuration disable unit comprising one or more programmable status bits. Each status bit is associated with a particular peripheral device function, such as a IDE or USB functions. When a status bit is set, configuration cycles to the function corresponding to that bit are disabled. In one aspect of the invention, the computer system comprises a laptop computer that can be docked to an expansion base. The laptop and the expansion base may duplicate one or more functions. When docked, the status bit in the bridge device associated with a function also provided in the expansion base is set disabling the duplicate function in the laptop in favor of the function in the expansion base. In this manner, only the peripheral device function in the expansion base is enabled, avoiding confusion to the computer system. When the bridge device receives a configuration cycle targeting a peripheral device function, the address decoder determines whether the status bit associated with that function is set. If the bit is indeed set, indicating that function is disabled in favor of expansion base, the bridge device does not claim the cycle. The CPU, or other device that initiated the cycle determines that the cycle has not been claimed by the bridge device and tries the cycle on the expansion base. If that function is available in the expansion base, then the CPU enables that expansion base peripheral for operation.
    • 公开了一种包括用于禁用各种外围设备功能的可编程桥逻辑器件的计算机系统。 桥逻辑装置优选地包括地址解码器和一个或多个外围总线控制器。 地址解码器优选地包括包括一个或多个可编程状态位的配置禁止单元。 每个状态位与特定的外围设备功能相关联,例如IDE或USB功能。 当状态位置1时,与该位相对应的功能的配置周期被禁用。 在本发明的一个方面,计算机系统包括可以对接到扩展基座的膝上型计算机。 笔记本电脑和扩展基座可能会复制一个或多个功能。 当对接时,在扩展基座中也提供的与功能相关联的桥接设备中的状态位被设置为禁用笔记本电脑中的重复功能,有利于扩展基础中的功能。 以这种方式,只有扩展基础中的外围设备功能才能使能,避免混淆计算机系统。 当桥接器件接收到针对外围设备功能的配置周期时,地址解码器确定与该功能相关联的状态位是否被设置。 如果该位确实已设置,表示该功能被禁用以支持扩展基地,则桥接器件不会声明该周期。 启动该循环的CPU或其他设备确定桥接器件尚未声明该循环,并尝试扩展基础上的循环。 如果该功能在扩展基板中可用,则CPU会使扩展基板外围设备运行。