Computer system and control method thereof

A control method of a computer system comprising:

• assigning a first communication channel of a plurality of communication channels of the device controller to a device supporting a predetermined interface mounted in an internal mounting unit;
• assigning a second communication channel of the plurality of communication channels to an external apparatus mounted in an external mounting unit;
• and
• selectively connecting the external apparatus mounted in the external mounting unit to one of the second communication channel of the device controller and the device mounted in the internal mounting unit depending on whether the computer system is powered on or off.

A computer system, comprising:

• a device controller comprising a plurality of communication channels, wherein a first one of the communication channels communicates with a device mounted in an internal mounting unit, and wherein a second one of the communication channels communicates with an external apparatus mounted in an external mounting unit;
• a switching controller comprising a switching part to selectively connect the external apparatus mounted in the external mounting unit to one of the second communication channel and the device mounted in the internal mounting unit and a controlling part to detect the power on/power off of the computer system, wherein the controlling part directs the switching part to connect the external apparatus to the device mounted in the internal mounting unit when the computer system is powered off and directs the switching part to connect the external apparatus to the second communication channel when the computer system is powered on;
• and
• an internal power supply mounted in the computer system to supply power to the computer system while the computer system is powered on.

A computer system, comprising:

• a device controller comprising a plurality of communication channels, wherein a first one of the communication channels communicates with a device mounted in an internal mounting unit, and wherein a second on of the communication channels communicates with an external apparatus mounted in an external mounting unit;
• a switching controller comprising a switching part to selectively connect the external apparatus mounted in the external mounting unit to one of the second communication channel and the device mounted in the internal mounting unit;
• a microcomputer to direct, based upon the receipt of a first signal, the switching part to connect the external apparatus to the device mounted in the internal mounting unit and, based upon the receipt of a second signal, to direct the switching part to connect the external apparatus to the second communication channel;
• and
• a user input part to transmit the first and second signals to the microcomputer based upon user input.

A computer system, comprising:

• a device controller comprising a plurality of communication channels, wherein a first one of the communication channels communicates with a device mounted in an internal mounting unit, and wherein a second one of the communication channels communicates with an external apparatus mounted in an external mounting unit;
• a switching controller comprising a switching part and a controlling part;
• a CPU mounted in the computer system to transmit a power-on signal and a power-off signal to the switching controller;
• and
• wherein the switching part selectively connects the external apparatus mounted in the external mounting unit to one of the second communication channel and the device mounted in the internal mounting unit and a controlling part to detect the power on/power off of the computer system and wherein the controlling part directs the switching part to connect the external apparatus to the device mounted in the internal mounting unit when the switching controller receives the power-off signal and directs the switching part to connect the external apparatus to the second communication channel when the switching controller receives the power-on signal.