PROCESSOR / CPU

 

Central Processing Unit (CPU) Computer Hardware to understand and implement data and commands from the software. For most ordinary people they call PROCESSOR

 
 

 HOW TO WORK CPU (PROCESSOR)

 
  When the data and / or processing-instruction incorporated into devices, the first one placed in MAA (via Input-storage), is a form of instruction accommodated by the Control Unit in-storage program, but is a form of data stored in the Working-storage).

  If the register is ready to receive the work execution, the Control Unit will take instructions from program-storage for ditampungkan to the Instruction Register, while the memory address that contains the instructions stored in the Program Counter.While the data taken by the Control Unit of the Working-storage to be accommodated in general-purpose registers (in this case-register operands). If the work is done based instruction is arithmetic and logic, ALU will then take over the operation to do based on the instruction set. The result is stored in the accumulator. If the results of the processing has been completed, the Control Unit will take the results of the processing in the Accumulator to fit back into the Working-storage. If the whole work has been completed, the Control Unit will pick up the processing of Working-storage to fit into the Output-storage. Then the rest of Output-storage, processing results will be displayed to the output devices.

 

FUNCTION CPU (PROCESSOR) 

CPU (PROCESSOR) functions like calculators, only the CPU (PROCESSOR) is much more powerful processing power.

  The main function of the CPU (PROCESSOR) is doing arithmetic and logic operations on data drawn from memory or from the information entered through multiple hardware devices, such as keyboard, scanner, lever controls, as well as from the mouse. CPU (PROCESSOR) is controlled using a set of computer software instructions. The software can be run by the CPU (PROCESSOR) to read from storage media such as hard disks, floppy disks, compact discs, or tape recorder. These instructions are then stored in advance in physical memory (MAA), in which each instruction is assigned a unique address called a memory address. Furthermore, the CPU (PROCESSOR) can access the data on the MAA by specifying the address of the desired data.

 

COMPONENTS CPU (PROCESSOR)

  CPU (PROCESSOR) component is divided into several types, which are as follows.

  1. The control unit that can set the course of the program. This component is certainly present in all CPU (PROCESSOR). CPU (PROCESSOR) in charge of controlling the computer so that synchronization occurs between components working in performing operations functions. included in the control unit is the responsibility of the instruction-fetch instructions from main memory and determine the type of instruction. If there are instructions for arithmetic or logical comparisons, the control unit will send instructions to the ALU. The results of processing the data carried by the control unit to the main memory to be stored, and the time will be presented to the output device. Thus the task of the control unit are:o Organize and control input devices (input) and output (output).o Taking instructions from main memory.o Retrieving data from main memory (if required) for processing.o Sending instructions to the ALU when arithmetic or logical comparisons and oversees the work of the ALU.o Saving results into the main memory.

   2. Register is a small storage device that has access to high speed, which is used to store data and / or instructions that are processed. Memory is temporary, usually used to store data when in though or data for subsequent processing. By analogy, these registers can be likened to a memory in the brain when we perform manual processing, so that the brain can be likened to the CPU, which contains memories, the control unit that governs all activities of the body and have a place to perform calculations and logical comparisons.

   3. ALU units assigned to perform arithmetic operations and logic operations based on instruction set. ALU is often called machine language because this part ALU consists of two parts, the unit arithmetika and boolean logic units, each of which has its own job specifications. The main task of the ALU is to perform all arithmetic calculation that occurs in accordance with the instructions of the program. ALU perform all arithmetic operations on the basis of the sum so that the electronic circuitry used is called adder.Another task of the ALU is to make the decision of a logic operation in accordance with the instructions of the program. Logic operation involves the comparison of two operands by using a certain logical operators, which is equal to (=), not equal to (¹), less than (<), less than or equal to (£), greater than (>), and greater or equal to (³).

   4. Interconnections are CPU (PROCESSOR) and bus connection system that connects the internal components of the CPU (PROCESSOR), the ALU, and control unit registers and also with external buses connecting the CPU (PROCESSOR) with other systems, such as the main memory, device input / output.

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