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In computing and especially in computer hardware, a controller is a chip, an expansion card, or a stand-alone device that interfaces with a peripheral device. This may be a link between two parts of a computer (for example a memory controller that manages access to memory for the computer) or a controller on an external device that manages the operation of (and connection with) that device. The term is sometimes used in the opposite sense to refer to a device by which the user controls the operation of the computer, as in ''game controller''. In desktop computers the controller may be a plug in board, a single integrated circuit on the motherboard, or an external device. In mainframes the controller is usually either a separate device attached to a channel or integrated into the peripheral. ==Controller boards== Early desktop computers such as the IMSAI 8080 used expansion boards (or expansion cards) for all controllers, each handling a specific type of device. Examples of expansion board controllers are: * Graphics controller or video display controller * SCSI controller, more properly called ''SCSI host bus adapter'' * Network interface controller (NIC) * Parallel port controller 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Controller (computing)」の詳細全文を読む スポンサード リンク
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