公开(公告)号：US6101566A

公开(公告)日：2000-08-08

申请号：US41606

申请日：1998-03-13

申请人： Robert Woods ,  Jeff W. Wolford ,  Jeffrey C. Stevens ,  Shaun Wandler ,  Todd Deschepper ,  Jeffrey T. Wilson ,  Danny Higby ,  Russ Wunderlich

发明人： Robert Woods ,  Jeff W. Wolford ,  Jeffrey C. Stevens ,  Shaun Wandler ,  Todd Deschepper ,  Jeffrey T. Wilson ,  Danny Higby ,  Russ Wunderlich

IPC分类号： G06F13/38 ,  G06F13/40 ,  G06F13/14

CPC分类号： G06F13/385 ,  G06F13/4027

摘要： A computer system includes a CPU and a memory device coupled by a North bridge logic unit to an expansion bus, such as a PCI bus. A South bridge logic connects to the expansion bus and couples various secondary busses and peripheral devices to the expansion bus. The South bridge logic includes internal control devices that are targets for masters on the expansion bus. The target devices couple to the expansion bus through a common expansion target interface, which monitors and translates master cycles on the expansion bus on behalf of the target devices. The South bridge also includes an internal modular target expansion bus coupling the internal target devices to the common target interface. The internal modular target expansion bus permits the target devices to receive master cycles from any expansion bus by understanding a standardized group of signals represented by the internal modular target expansion (IMAX) bus. The target interface then is responsible for understanding the protocol of the expansion bus and converting the expansion bus signals to IMAX target bus signals. The IMAX target bus includes both an inbound bus and an outbound data bus for driving out data requested as part of a read cycle to an internal target device.

摘要翻译： 计算机系统包括CPU和由北桥逻辑单元耦合到诸如PCI总线的扩展总线的存储器件。 南桥逻辑连接到扩展总线，并将各种辅助总线和外围设备耦合到扩展总线。 南桥逻辑包括作为扩展总线主机的目标的内部控制设备。 目标设备通过公共扩展目标接口耦合到扩展总线，该接口监视和翻译扩展总线上的主周期，代表目标设备。 南桥还包括将内部目标设备耦合到通用目标接口的内部模块化目标扩展总线。 内部模块化目标扩展总线允许目标设备通过理解由内部模块化目标扩展（IMAX）总线表示的标准化信号组来从任何扩展总线接收主周期。 目标接口然后负责理解扩展总线的协议，并将扩展总线信号转换为IMAX目标总线信号。 IMAX目标总线包括入站总线和出站数据总线，用于将作为读周期的一部分请求的数据驱出到内部目标设备。

公开(公告)号：US06226700B1

公开(公告)日：2001-05-01

申请号：US09042173

申请日：1998-03-13

申请人： Shaun Wandler ,  Jeffrey C. Stevens ,  Jeff W. Wolford ,  Robert Woods ,  Danny Higby ,  Russ Wunderlich ,  Todd Deschepper ,  Jeffrey T. Wilson

发明人： Shaun Wandler ,  Jeffrey C. Stevens ,  Jeff W. Wolford ,  Robert Woods ,  Danny Higby ,  Russ Wunderlich ,  Todd Deschepper ,  Jeffrey T. Wilson

IPC分类号： G06F1340

CPC分类号： G06F13/4045

摘要： A computer system includes a CPU and a memory device coupled by a North bridge logic unit to an expansion bus, such as a PCI bus. A South bridge logic connects to the expansion bus and couples various secondary busses and peripheral devices to the expansion bus. The South bridge logic includes internal control devices or master devices that are designed to run master cycles on the expansion bus. The master devices couple to the expansion bus through a common expansion master interface, which executes master cycles on the expansion bus on behalf of the master devices. The South bridge also includes an internal modular master expansion bus coupling the internal master devices to the common master interface. The internal modular master expansion bus permits the master devices to run master cycles to any expansion bus by understanding a standardized group of signals represented by the internal modular master expansion (IMAX) bus. The master interface then is responsible for understanding the protocol of the expansion bus and converting the IMAX master bus signals to signals compatible with the expansion bus. In addition, a dedicated target IMAX bus may also be provided for coupling internal targets within the South bridge to masters on the expansion bus through a common expansion target interface.

摘要翻译： 计算机系统包括CPU和由北桥逻辑单元耦合到诸如PCI总线的扩展总线的存储器件。 南桥逻辑连接到扩展总线，并将各种辅助总线和外围设备耦合到扩展总线。 南桥逻辑包括设计用于在扩展总线上运行主站周期的内部控制设备或主设备。 主器件通过公共扩展主接口耦合到扩展总线，该接口代表主器件在扩展总线上执行主器件周期。 南桥还包括将内部主设备连接到公共主接口的内部模块化主扩展总线。 内部模块化主扩展总线允许主器件通过了解由内部模块化主扩展（IMAX）总线表示的标准化信号组，将主周期运行到任何扩展总线。 然后，主接口负责了解扩展总线的协议，并将IMAX主总线信号转换为与扩展总线兼容的信号。 此外，还可以提供专用目标IMAX总线，用于通过公共扩展目标接口将南桥内的内部目标耦合到扩展总线上的主设备。