An arithmetic logic unit is a digital circuit that performs arithmetic and Boolean logic operations. It is one of the fundamental building blocks of modern central processing units.
Continue ReadingArithmetic operations that ALUs can perform are addition, subtraction, multiplication and division. Logic operations include inversion of single values and comparison of two or more values in NOT, AND and OR operations.
A control unit fetches data and desired operation type from main memory before relaying this information to the ALU for treatment. Most ALUs can only treat two values in a single operation. Operations involving more than two values, such as addition followed by multiplication, are usually broken down and done in successive steps. ALUs are the last component to perform operations on data in the processor; after exiting the ALU, the data is relayed back to memory. The ALU may also pass along information on the serial order of the current and subsequent operation.
Specialized types of ALUs are used in floating point units and graphics processing units. Most modern CPUs contain several ALUs, enabling the simultaneous execution of multiple arithmetic and logic operations. The ALU was first conceptualized by mathematician John von Neumann in 1945 as part of his work on EDVAC, an early computer.
Learn more about Computers & HardwareThe main circuit board of the system unit is called a motherboard. It is also known as the main circuit board, system board or logic board in Apple computers. It is the foundation of all of the computer's vital functions.
Full Answer >The CPU, short for central processing unit, performs the primary arithmetic, logic and control functions of a computer. The CPU is made up of two primary components: the arithmetic logic unit, which handles the arithmetic and logic functions, and the control unit, which handles the control functions.
Full Answer >A computer processor is the logic circuitry that receives and processes the basic instructions given to a computer by the user. It harmonizes different processes inside the computer to deliver what the user needs. The speed of a computer depends on the speed of the computer processor.
Full Answer >In the central processing unit, or CPU, of a computer, the accumulator acts as a special register that stores values and increments of intermediate arithmetic and logic calculations. The accumulator is a temporary memory location that is accessed speedily by the CPU.
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