公开(公告)号：EP0820021A3

公开(公告)日：1998-01-28

申请号：EP97305239.2

申请日：1997-07-15

Applicant: Compaq Computer Corporation

Inventor： Santos, Gregory N. ,  Maguire, David J. ,  Riley, Dwight D. ,  Edwards, James R.

IPC: G06F13/40

CPC classification number: G06F13/4045

Abstract: A computer system having an expansion base for docking a portable portion of the computer system includes a bridge circuit for adaptively decoding addresses on a bus based on the docking status. Both the expansion base and the portable portion include the bridge circuit for passing cycles from a peripheral component interconnect (PCI) bus to an industry standard architecture (ISA) bus. The bridge includes internal devices and configuration registers for controlling the decoding. Bus cycles intended for internal devices and external devices connected to each respective ISA bus of the bridge circuits are positively decoded. Cycles not positively decoded and claimed are subtractively decoded by one of the bridge circuits depending on the docking status.

Abstract translation: 具有用于对接计算机系统的便携部分的扩展基座的计算机系统包括桥接电路，用于基于对接状态自适应解码总线上的地址。 扩展基座和便携式部分都包括桥接电路，用于将外围部件互连（PCI）总线的周期传递给工业标准体系结构（ISA）总线。 该桥包括用于控制解码的内部器件和配置寄存器。 用于连接到桥电路的各个ISA总线的内部设备和外部设备的总线周期被肯定解码。 取决于对接状态，未被正解码和声明的周期由桥电路之一进行减法解码。

公开(公告)号：EP0820022A2

公开(公告)日：1998-01-21

申请号：EP97305240.0

申请日：1997-07-15

Applicant: Compaq Computer Corporation

Inventor： Lin, Richard S. ,  Maguire, David J. ,  Edwards, James R. ,  Delisle, David J.

IPC: G06F13/40

CPC classification number: G06F13/4081 ,  G06F13/36

Abstract: A method for hot docking and hot undocking a portable computer and a docking station. The portable computer and docking station are physically coupled via a shared PCI bus and an expansion connector. Varying length pins in the expansion connector generate docking and undocking handshaking signals used by microcontrollers in the portable computer and docking station. The portable computer and docking station are functionally connected via low on-resistance switches located in the portable computer. Following a docking event, closure of the switches connects the portion of the shared PCI bus in the docking station with the PCI bus in the portable computer. When the switches are open, the PCI busses are functionally isolated. Both the portable computer and the docking station also include a local arbiter for arbitrating and granting bus control requests from devices coupled to the shared PCI bus. These local arbiters may be placed into an idled state by either the operating system (through system BIOS) or by the microcontrollers. The arbiters are idled during docking and undocking events in order to inhibit bus cycles on the PCI bus, thereby preventing cycles from being lost. Following completion of a hot docking or undocking event, Plug-and-Play system reconfiguration is carried out so that all system resources may be recognized and properly utilized by the operating system.

Abstract translation: 便携式计算机和对接站的热对接和热脱离的方法。 便携式计算机和坞站通过共享PCI总线和扩展连接器物理耦合。 扩展连接器中的不同长度的针脚可以在便携式计算机和扩展坞中产生微控制器使用的对接和脱离握手信号。 便携式计算机和坞站通过位于便携式计算机中的低导通电阻开关功能连接。 在对接事件之后，开关的闭合将坞站中的共享PCI总线的一部分与便携式计算机中的PCI总线相连接。 当交换机打开时，PCI总线功能隔离。 便携式计算机和对接站也包括本地仲裁器，用于仲裁并授予来自耦合到共享PCI总线的设备的总线控制请求。 这些本地仲裁器可能由操作系统（通过系统BIOS）或微控制器置于空闲状态。 仲裁器在对接和脱离事件期间空闲，以阻止PCI总线上的总线周期，从而防止周期丢失。 在完成热对接或脱离事件之后，进行即插即用系统重新配置，以便操作系统可以识别和正确使用所有的系统资源。