Rev. I Hardware Specifications 3-3MR Series Technical Reference ManualConfiguration of Circuit BoardsMain BoardMouseKeyboardParallelCOM1CRTLANUSB x2Line-OutLine-InMic-InCOM2HeaderCPUSocket(370-pin)CD AudioHeaderJP15Riser Card SlotCPU FanConnectorATX ConnectorDIMM SocketsSystem FanConnectorPower SwitchConnectorLEDConnectorBIOSFDDSecondary IDEPrimary IDEFront USBHeaderJP10SpeakerCOMS CLEAR JumperRTC BatterySpeakerConnector