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A super I/O controller on a motherboard is responsible for managing legacy I/O devices and interfaces, such as serial and parallel ports, floppy disk controllers, and keyboard/mouse interfaces. It provides a bridge between these older technologies and the motherboard's more modern components, facilitating communication and data transfer. Additionally, it often includes functions for temperature monitoring and fan control, enhancing system management. Overall, it ensures compatibility with legacy peripherals while supporting the overall functionality of the system.

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