A computing system includes a computing device and an input data path connecting an interface device to the computing device. The input data path has at least two data relays and at least one buffer memory temporarily storing data. Each of the data relays has first and second terminals and a central terminal and selectively interconnects the first and central terminals or the second and central terminals and leaves the first and second terminals constantly separated from each other. The first terminal of a first relay is connected to the interface device, and the second terminal is connected to the computing device. The central terminal of the first data relay is connected to the buffer memory. The intermediate buffer memory is selectively connected by the first data relay solely to the interface device or the second terminal of the first data relay, but not to both simultaneously.