Patent ID: 8271712

Claim:
An information processing apparatus comprising: a main board on which a first CPU is mounted; an expanded CPU board connector that is disposed on the main board and to which an expanded CPU board is connectable, a second CPU being mounted on the expanded CPU board; an external device connector that is disposed on the main board and to which an external device is connected; and a detection unit that detects that the expanded CPU board is installed to the expanded CPU board connector, wherein, when the detection unit detects that the expanded CPU board is installed to the expanded CPU board connector, the first CPU controls the information processing apparatus to change an operation body, from the first CPU to the second CPU, of the information processing apparatus and signal control between the information processing apparatus and the external device, and wherein the main board comprises: a switch that physically connects any one of the first CPU and the second CPU to the external device; and a configuration shift unit that operates the switch to physically connect the second CPU to the external device through the expanded CPU board connector in response to the detection unit detecting that the expanded CPU board is installed to the expanded CPU connector.