| Jerry | Date: Monday, 26/09/2011, 11:43 AM | Message # 1 |
 Ford Everest
Group: Administrators
Messages: 137
Status: Offline
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CPU stands for Central Processing Unit, and is the Heart of a computer. In any normal computer this CPU is a microprocessor. A microprocessor is a chip that does all of the calculations for the computer. The CPU contains three major parts:
*the Control Unit (CU),
*the Arithmetic and Logic Unit (ALU),
and the primary memory (Note: in some definitions the primary memory does not belong to the CPU).
1. Control Unit (CU)
*The Control Unit controls the CPU and manages what happens inside of it.
*Controls sequence of execution
*Moves data between the CPU and the computer memory via the data bus
*Controls what is stored in the cache for fastest access
*Accesses the memory addresses with the address bus. The address bus is connected to the address section of the computer’s memory
*Also takes care of fetching and decoding
2. Arithmetic Logic Unit (ALU)
*Carries out logical operations (ex. Comparisons)
*Carries out arithmetic operations (ex. Addition)
3. Primary Memory
[see section 3.2.5 Primary Memory]
4. Buses
*Address bus: With the address bus addresses of locations in the primary memory are transferred. The according actual information then is transferred with the data bus.
*Data bus: Actual data is transferred via this bus. The addresses declaring which data to send or where to send the information are sent via the address bus.
Vocabulary review/flashcards: Quizlet.com
Sources:
"Arithmeic Logic Unit." Wikipedia. 25 August 2010. Wikimedia.org. 2 September 2010. https://secure.wikimedia.org/wikipedia/en/wiki/Arithmetic_logic_unit
"Control Unit." Wikipedia. 31 August 2010. Wikimedia.org. 2 September 2010. https://secure.wikimedia.org/wikipedia/en/wiki/Control_unit
Jones, Richard. Computer Science Java Enabled. Victoria: IBID Press, 2004.
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