The Central Processing Unit

1. The central processing unit, The CPU, has three main parts: the Control Unit, the Arithmetic and Logic Unit and Registers. These components are connected to the rest of the computer by buses.

2. The Arithmetic and Logic Unit, ALU for short, performs arithmetic functions like addition and subtraction, and logic operations such as AND, OR and NOT.

3. The Control Unit makes the computer carry out each instruction of a program in the right order and controls the operation of all hardware.

4. Registers are temporary storage areas for instructions or data. They work under the direction of the control unit.

5. The function of registers is to hold instructions or data immediately required for an operation. The function of the main memory is a little different: the main memory stores data required in the near future.

6. Registers work at high speed. Actually, all components of a CPU work at very high speed. Thanks to that many personal computers can execute instructions in less than one-millionth of a second.

Task 8

Прочитайте текст и найдите в нем английские эквиваленты следующим русским словам и словосочетаниям. Read the text and find the equivalents to the following Russian words and expressions.

С помощью шин, выполнять арифметические операции, блок управления, АЛУ, немедленно необходимы для выполнения операции, управлять работой аппаратной части, вычитание, регистры, в правильном порядке, с высокой скоростью.

Task 9

Answer the questions. Дайте ответы на вопросы по тексту.

1. What main parts does the CPU have?

2. How are CU, ALU and Registers connected to the rest of the computer?

3. What are registers for?

4. What is the function of the Control Unit?

5. Does the Control Unit control the operations of all hardware in the computer?

Дата добавления: 2015-09-04