In embodiments of mixed sequential color display, a light source sequentially generates different colors of light in a timed sequence. The optical cable harness assembly includes at least one optical cable harness having a termination end; at least one electrical connector having connector pins; and at least one active connector conversion unit coupled between the termination end of the optical harness cable and the electrical connector. A plant model having a model transfer function generates an estimated state of the VCM in response to a detected current flowing through the voice coil. A descriptor management unit in the network interface reads the termination field in the descriptor and determines whether the frame data is currently being sent or is scheduled for transmission. When the virus co-processor is determined to be coupled to the general purpose processor, then it is further determined by the general purpose processor which virus signatures are supported by the virus co-processor. Each gearwheel of the input shafts meshes with at least one gearwheel of the two layshafts.