Patent ID: 7254653

Claim:
A switch control system for a plurality of input devices comprising a real input device and an emulation input device, the switch control system comprising: a switch device for selecting either of the two input devices, and then isolating signals of an unselected input device when a selected input device is transmitting or receiving signals, the switch device comprising: a first switch having a first input directly coupled to the real input device; a second switch having a first input directly coupled to an output of the first switch, a second input directly coupled to the emulation input device, an output for directly coupling to a computer, and a control input; a third switch having a first input for directly coupling to the computer and directly coupled to the emulation input device, and a control input directly coupled to the real input device; and a fourth switch having an output directly coupled to the real input device and to a control input of the first switch, a first input directly coupled to an output of the third switch, and a control input; an instruction detecting device electrically connected to the switch device for detecting signals transmitted to the switch device; and a control device electrically connected to the control input of the second switch, to the control input of the fourth switch, and to the instruction detecting device for receiving a detecting signal from the instruction detecting device and outputting a control signal to trigger the switch device and to control the selection of the switch device.