Write notes on device controller.
Answers
A device controller is a part of a computer system that makes sense of the signals going to, and coming from the CPU. There are many device controllers in a computer system. Any device connected to the computer is connected by a plug and socket, and the socket is connected to a device controller. Device controllers use binary and digital codes. Each device controller has a local buffer and a command register. It communicates with the CPU by interrupts. A device's controller plays an important role in the operation of that device; it functions as a bridge between the device and the operating system.
I-O devices generally contain two parts. One is mechanical and another is electrical part. This electrical part is known as a device controller and can take the form of a chip on personal computers.
