A bobbin and a magnetic transmittingreceiving stator are positioned by fitting two positioning projections provided for a bobbin flange into two positioning holes formed in a stator flange. In one embodiment, data is provided into a first portion of memory on a video card and the first portion has a first level of protection. The apparatus includes power regulation circuitry including a pair of terminals coupled to the engine magneto. A controller selectively sets one of the plurality of first buffers as output destination of the flit stored in each of the second buffers based on a free space of the plurality of first buffers.