US Patent 7596640 Computer program product for managing connections

A computer program product for managing connections comprises a computer readable storage medium having the following computer instructions. The instructions cause a controller to perform: outputting an image including icons representing respective devices connected to an IEEE 1394 serial bus to display means; and establishing a logical connection between two of the connected devices by updating the contents of iPCR and oPCR stored in register spaces in the two connected devices and updating data for management of a band and a channel that is stored in a register space provided in an isochronous resource manager, which is a node for isochronous resource management on the IEEE 1394 serial bus, when a user enters a selection of the two connected devices to be logically connected to each other from among the connected devices on the bus.