Patent ID: 7262961

Claim:
An information processing apparatus comprising: a body; a bay portion provided in the body and in which a one of a first device having a first relay board and a second device having a second relay board is removably inserted; a first controller which communicates with the first device; a second controller which communicates with the second device; a connector provided in the bay portion and connected to the first relay board or the second relay board, and including a plurality of first signal pins connected to the first controller via a first bus, a plurality of second signal pins connected to the second controller via a second bus, two ground pins connected to a common ground, a first power supply pins and a second power supply pins, and one of the second signal pins locates between the two ground pins; and a power supply controller configure to supply a first power supply voltage via the first power supply pins to the first device when the second device inserted in the bay portion, and to supply a second power supply voltage via the second power supply pins to the second device when the second device is inserted in the bay portion.