Method and apparatus for a dual mode PCI/PCI-X device

A system for providing accurate transaction output for dual mode PCI/PCI-X devices initiated in a computer system comprising:

• means for receiving an input signal from a requesting device, wherein the input signal is transmitted through a PCI/PCI-X bus to a bridge;
• means for transmitting the input signal to a core logic device in a PCI functional path, if the input signal is initiated by a PCI device;
• means for transmitting the input signal to the core logic device in a PCI-X functional path, if the input signal is initiated by a PCI-X device;
• means for transmitting an output signal from the core logic device to the PCI/PCI-X bus in the PCI functional path, if the input signal was initiated by a PCI device;
• and
• means for transmitting the output signal from the core logic device to the PCI/PCIX bus in the PCI-X functional path, if the input signal was initiated by a PCI-X device.

A method for providing transaction output for dual mode PCI/PCI-X devices initiated in a computer system, wherein the method comprises the acts of:

• (a) receiving an input signal from a requesting device, the signal being in one of a PCI format and a PCI-X format;
• (b) transmitting the input signal along a first path and a second path, the first path being delayed relative to the second path;
• (c) processing the input signal on the first path if the input signal is in the PCI format;
• and
• (d) processing the input signal on the second path if the input signal is in the PCI-X format.

A method in a bridge having a core logic device and an input/output buffer, the method comprising the acts of:

• (a) transmitting a signal from the core logic device to a PCI latch and to a PCI-X latch, the PCI latch being positioned proximate the core logic device and the PCI-X latch being positioned proximate the input/output buffer;
• (b) transmitting the signal from the PCI latch to the I/O buffer if the signal is in PCI format;
• and
• (c) transmitting the signal from the PCI-X latch to the I/O buffer if the signal is in PCI-X format.

A computer system comprising:

• at least one processor;
• a bridge operatively coupled to the at least one processor;
• a bus operatively coupled to the bridge and to a plurality of peripheral devices;
• and
• a plurality of logic devices configured to store and select an input signal transmitted from one of the plurality of peripheral devices operating in a PCI format and a PCI-X format, the input signal transmitted in a first path according to the PCI format and the input signal transmitted in a second path according to the PCI-X format, wherein the input signal is transmitted to a core logic device, and an output signal is transmitted from the core logic device to one of the plurality of peripheral devices.

A method for manufacturing a system for providing accurate transaction output from a computer system to a plurality of requesting devices, the method comprising the acts of:

• (a) providing logic devices for receiving an input signal from one of the plurality of requesting devices, wherein the input signal is transmitted through a PCI/PCI-X bus to a bridge;
• (b) providing logic devices for the input signal to be transmitted to the core logic device from the PCI/PCI-X bus in a PCI functional path;
• and
• (c) providing logic devices for the input signal to be transmitted to the core logic device from the PCI/PCI-X bus in a PCI-X functional path.