Bus controller with virtual bridge

Details Bus controller with virtual bridge Bus controller with virtual bridge

2008-04-01

2008-04-01

Auve, Glenn A. (Department: 2111)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus interface architecture

C710S306000

Reexamination Certificate

active

07353315

ABSTRACT:
A bus controller and a control method are used in a computer system. In a bus controller, a bus controller main circuit issues a first signal to the central processing unit in response to a bus configuration cycle for indicating the presence of a first-level bus that the first group of components is coupled to. A virtual bridge device issues a second signal to the central processing unit in response to the bus configuration cycle for indicating the presence of a second-level bus that the second group of components is coupled to. A path selection unit electrically connected to the first and second groups of components via the first-level and second-level buses, respectively, outputs a normal device select signal to one of the first-level and second-level buses while outputting an invalid device select signal to the other of the first-level and second-level buses according to address data of a transaction.

REFERENCES:
patent: 2002/0073264 (2002-06-01), George et al.
patent: 2003/0005207 (2003-01-01), Langendorf et al.
patent: 2004/0064602 (2004-04-01), George
patent: 2006/0010278 (2006-01-01), Dennis et al.
patent: 2006/0236016 (2006-10-01), Tetrick

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