Method and apparatus for terminating a bus transaction if the target is not ready

Abstract

One embodiment of the present invention is a PCI bus target device. The PCI bus target device includes a first circuit, a second circuit, a third circuit, and a fourth circuit. The first circuit is configured to determine whether the PCI bus target device is the target of a first transaction initiated by a first PCI bus master device. The second circuit is configured to determine whether the PCI bus target device is ready to complete the first transaction. The third circuit is configured to determine whether a second PCI bus master device is ready to initiate a second transaction. The fourth circuit is configured to terminate the first transaction if the PCI bus target device is the target of the first transaction and is not ready to complete the first transaction and the second PCI bus master device is ready to initiate the second transaction.

Dependencies are inferred from the claim text.