A direct memory access controller is set forth. The host computer is connected to a local extender device which, in turn, is connected to one or a plurality of remote extender devices through the data communications network. The module device for data buffering is composed of, among other memory devices, a First In Tap Out data buffer that may be accessed at any point for delay or faster than real time resynchronization by the DSP module device. When selecting a document registered by the user, a list of the reduced images is displayed. A steering damper is arranged between left and right main frames of a vehicle body frame and, at the same time, is arranged above or below an intake duct which penetrates the vicinity of a head pipe of the vehicle body frame. The support is fastened to a swirl pot while the holding part bears a lever arm that supports a float.