Methods and apparatus for accessing an extended register space associated with a processor are disclosed. In response to this, a torque command change section changes a torque command to a second rotating electric machine other than a first rotating electric machine of which the slip frequency is changed such that a torque fluctuation caused by the change of the slip frequency command value is canceled out. A rectangle may be associated to one or more graphics elements of the single graphics plane. The capacitor structure includes a well region as a bottom capacitor plate, a capacitor dielectric layer, and a top capacitor plate formed on the substrate respectively.