When a command radius r of a circular interpolation control exceeds a threshold value, a computer computes a speed limit for the circular speed at which the acceleration becomes constant. The game device 10 determines a shift amount from a reference position for a frame 62 of a predetermined size representing a display area of each captured image. An acknowledgement of the requests is provided in response to the requests being received by the one or more queues. The other processors of the network poll the flag until set and get the coprocessor result in the data field.