An attachment structure for drive cables include a first fixing member and a second fixing member separate from the first fixing member, which are designed to fix the drive cables in a non-slidable manner. The apparatus has the film, a vacuum chamber, primary beam irradiation column, signal detector, and a controller for controlling the operations of the beam irradiation column and signal detector. The transistor of the semiconductor device can operate as a 2-bit or 3-bit cell transistor. The substitution control unit includes a substitution control word memory configured to store a plurality of substitution control words and configured to receive the read address first portion and assert a substitution control word including a substitution address second portion. Frame sizes may be adjusted, for example, so that a size of each frame is multiple of a size of a payload of the network packets that are utilized in data communication.