outputting an image including icons representing the respective connected devices on the IEEE 1394 serial bus to display means, wherein the image includes the icons representing the respective connected devices in such a format that shows physical and logical connections existing between the connected devices on the IEEE 1394 serial bus, including all physical daisy-chained connections comprising the physical connections and intermediate devices of the physical daisy-chained connections;

establishing a logical connection between two of the connected devices by updating contents of an input plug control register (iPCR) and an output plug control register (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 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 IEEE 1394 serial bus, the isochronous resource manager being a node for isochronous resource management on the IEEE 1394 serial bus,

reading a topology map from a bus manager that is a node for managing the IEEE 1394 serial bus, the topology map containing information concerning the physical connections existing between the connected devices on the IEEE 1394 serial bus; and

editing the image including the icons representing the respective connected devices based on the content of the read topology map.