公开(公告)号：JPH1069457A

公开(公告)日：1998-03-10

申请号：JP19614397

申请日：1997-07-22

Applicant: COMPAQ COMPUTER CORP

Inventor： RILEY DWIGHT D ,  EDWARDS JAMES R ,  MAGUIRE DAVID J

IPC: G06F13/362 ,  G06F13/368

Abstract: PROBLEM TO BE SOLVED: To arbitrate access to a plurality of buses by a plurality of arbiters. SOLUTION: A computer system is provided with a freely attachable and detachable lap-top part and an extension base connected through a PCI (peripheral component interface bus) 112a. They are respectively provided with different PCI arbiter circuits 204 so as to arbitrate requests from a PCI bus master and an ISA (industry standard architecture) bus master to the PCI bus. The lap-top part is provided with a top level arbiter and judges whether or not a PCI arbiter inside the lap-top or the extension base is provided with the access to the PCI bus. Before executing a cycle, either one of the PCI arbiters receives permission from the top level arbiter, and while the lap-top part is docked, the top level arbiter performs selection between the PCI arbiters in a time division multiplexmanner. When the extension base and the lap-top part are not docked, the top level arbiter permits the bus access to the PCI arbiter of the lap-top.

公开(公告)号：JPH10116246A

公开(公告)日：1998-05-06

申请号：JP19614997

申请日：1997-07-22

Applicant: COMPAQ COMPUTER CORP

Inventor： SANTOS GREGORY N ,  MAGUIRE DAVID J ,  RILEY DWIGHT D ,  EDWARDS JAMES R

IPC: G06F13/36 ,  G06F13/40

Abstract: PROBLEM TO BE SOLVED: To performs the absolute and subtractive decoding of an address on the computer bus according to a configuration. SOLUTION: An extension base for docking a portable part and a corresponding part together is included in a bridge circuit which decodes an address adaptively according to the docking state, and the bridge circuit passes a cycle from a peripheral component interconnect) bus 200 to an industrial standard architecture(ISA) bus 202. The bridge circuit includes a configuration register 224 which controls an internal device and decoding. Bus cycles specified for internal devices and external devices connected to respective ISA buses of the bridge circuit are absolutely decoded. A cycle which is neither decoded nor requested absolutely is subtractively decoded by one bridge circuit according to the docking status.

公开(公告)号：JPH1063383A

公开(公告)日：1998-03-06

申请号：JP19614197

申请日：1997-07-22

Applicant: COMPAQ COMPUTER CORP

Inventor： LIN RICHARD S ,  MAGUIRE DAVID J ,  EDWARDS JAMES R ,  DELISLE DAVID J

IPC: G06F3/00 ,  G06F13/36 ,  G06F13/40

Abstract: PROBLEM TO BE SOLVED: To attain hot docking/undocking in a portable computer and a docking station. SOLUTION: A long pin 147a, a middle pin 147b and a short pin 147c are provided in an extension connector 146 and used for reporting a connection state by length. The portable computer L is connected to an extension base E with a quick switch 113. When the switch is closed after a docking event, the docking station part of a PCI bus 112 is connected to a portable computer part. When the switch is opened, the PCT bus is isolated in terms of a function. The switch is controlled by a signal generated by a microcontroller 170a in the portable computer.

公开(公告)号：DE69724884T2

公开(公告)日：2004-05-19

申请号：DE69724884

申请日：1997-07-15

Applicant: COMPAQ COMPUTER CORP

Inventor： SANTOS GREGORY N ,  MAGUIRE DAVID J ,  RILEY DWIGHT D ,  EDWARDS JAMES R

IPC: G06F13/36 ,  G06F13/40

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.

公开(公告)号：DE69724884D1

公开(公告)日：2003-10-23

申请号：DE69724884

申请日：1997-07-15

Applicant: COMPAQ COMPUTER CORP

Inventor： SANTOS GREGORY N ,  MAGUIRE DAVID J ,  RILEY DWIGHT D ,  EDWARDS JAMES R

IPC: G06F13/36 ,  G06F13/40

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.

公开(公告)号：DE69730916T2

公开(公告)日：2005-02-03

申请号：DE69730916

申请日：1997-07-15

Applicant: COMPAQ COMPUTER CORP

Inventor： LIN RICHARD S ,  MAGUIRE DAVID J ,  EDWARDS JAMES R ,  DELISLE DAVID J

IPC: G06F3/00 ,  G06F13/36 ,  G06F13/40

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.

公开(公告)号：DE69626485T2

公开(公告)日：2003-09-11

申请号：DE69626485

申请日：1996-12-10

Applicant: COMPAQ COMPUTER CORP

Inventor： WANNER CHRISTOPHER C ,  STEVENS JEFFREY C ,  LESTER ROBERT A ,  RILEY DWIGHT D ,  MAGUIRE DAVID J ,  EDWARDS JAMES R

IPC: G06F13/12 ,  G06F13/28

公开(公告)号：DE69626485D1

公开(公告)日：2003-04-10

申请号：DE69626485

申请日：1996-12-10

Applicant: COMPAQ COMPUTER CORP

Inventor： WANNER CHRISTOPHER C ,  STEVENS JEFFREY C ,  LESTER ROBERT A ,  RILEY DWIGHT D ,  MAGUIRE DAVID J ,  EDWARDS JAMES R

IPC: G06F13/12 ,  G06F13/28

公开(公告)号：SG71028A1

公开(公告)日：2000-03-21

申请号：SG1997002381

申请日：1997-07-07

Applicant: COMPAQ COMPUTER CORP

Inventor： LIN RICHARD S ,  MAGUIRE DAVID J ,  EDWARDS JAMES R ,  DELISLE DAVID J

IPC: G06F3/00 ,  G06F13/36 ,  G06F13/40

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.

公开(公告)号：CA1321839C

公开(公告)日：1993-08-31

申请号：CA612892

申请日：1989-09-25

Applicant: COMPAQ COMPUTER CORP

Inventor： GARNER PAUL M ,  BOONE CARRIE ,  CEPULIS DARREN J ,  CARTER ROBERT R ,  EDWARDS JAMES R

IPC: G06F13/14 ,  G06F9/06 ,  G06F15/177 ,  G06F9/445 ,  G06F1/24

Abstract: DYNAMICALLY CONFIGURABLE PORTABLE COMPUTER SYSTEM A dynamically configurable computer system which includes means for storing former and sensed current system configuration data and for automatically reconfiguring the system without user interaction.