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Keyboard controller

With IBM compatible computers, the keyboard controller or Intel 8042 keyboard controller is found on the motherboard. The controller handles input received from the computer keyboard, A20 Lines, RESET, deciphering scan codes, as well as the PS/2 mouse. With later models of keyboards the 8042 was replaced with the 8742 micro-controller, which had a microprocessor, RAM, and I/O ports.

Also see: Keyboard terms, Scan code