What Is A CPU ?
A CPU is the Central Processing Unit of a computer. It is the most essential part of a computer; without which the computer cannot run. The CPU was first built way back in the 1970s. Innovations in the CPU all along have been possible because of several developments in microprocessor technology.
The CPU ideally consists of the Control Unit or the Cu; the Arithmetic Loic Unit or ALU and Registers. The Control Unit controls or takes care of all functions taking place within the CPU and the computer. The Arithmetic Logic Unit or ALU is the one which is responsible for carrying out all complex and varied calculations.
In addition, the CPU also has many registers. These registers may perform very specific functions. Sometimes, the functions may also be very general in nature. Some of the registers are Program Counter or PC, Instruction Decoder, Instruction Register or IR, Process Status Register and Accumulator or ACC.
The Program Counter contains the address of the next operation which is to be performed; while the Instruction Register contains the instruction that is being carried out at the moment. The Process Status Register carries information about operations done by the CPU and the Accumulator stores the final results of the calculations carried out inside the ALU. The General Registers that are present other than these carry information from the operations that are currently being processed inside the CPU.
Apart from the CPU, the other parts of a computer are the keyboard, which is the input device, and the monitor, which is the output device.
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