Доцент кафедры ин.языков Гараева Римма Салаватовна

                                             для студентов групп 3622

                                             Контрольная работа должна быть сдана

                                             не позднее «______» __________2018г.

Контрольная работа № 4

Вариант II

Задание 1. Текст по специальности.

THE CPU MAIN COMPONENTS

As it is known the two functional units of the CPU are the control unit (CU) and the arithmetic-logical unit (ALU). The control unit manages and coordinates the entire computer sys-tem. It obtains instructions from the program stored in main memory, interprets the instructions, and issues signals that cause other units of the system to execute them.

The control unit operates by reading one instruction at a time from memory and taking the action called for by each instruction. In this way it controls the flow between the main storage and the arithmetic-logical unit.

The control unit has the following components: a counter that selects the instructions, one at a time, from memory; a register that temporarily holds the instructions read from memory while it is being executed; a decoder that takes the coded instruction and breaks it down into individual commands necessary to carry it out; a clock, which produces marks at regular intervals. These timing marks are electronic and very rapid.

The sequence of control unit operations is as follows. The next instruction to be executed is read out from primary storage into the storage register. The instruction is passed from the storage register to the instruction register. Then the operation part of the instruction is decoded so that the proper arithmetic or logical operation can be performed. The address of the operand is sent from the instruction register to the address register. At last the instruction counter register provides the address register with the address of the next instruction to be executed.

The arithmetic-logical unit (AL U) executes the processing operations called for by the instructions brought from main memory by the control unit. Binary arithmetic, the logical operations and some special functions are performed by the arithmetical-logical unit.

Data enter the ALU and return to main storage through the storage register. The accumulator serving as a register holds the results of processing operations. The results of arithmetic operations are returned to the accumulator for transfer to main storage through the storage register. The comparer performs logical comparisons of the contents of the storage register and the accumulator. Typically, the comparer tests for conditions such as "less than", "equal to", or "greater than".

So as you see the primary components of the arithmetic-logical unit are banks of bistable devices, which are called registers. Their purpose is to hold the numbers involved in the calculation and hold the results temporarily until they can be transferred to memory. At the core of the ALU is a very high speed binary adder, which is used to carry out at least the four basic arithmetic functions (addition, subtraction, multiplication and division). The logical unit consists of electronic circuitry which compares information and makes decisions based upon the results of the comparison.

Задание 2. Задания по тексту

I. Переведите письменно на русский язык весь текст.

II. Ответьте письменно на вопросы по тексту.

1. What are the functional units of CPU?

2. What is the function of CU?

3. How does CU operate?

4. What is the function of a counter?

5. What role does a decoder play?

6. What is the sequence of CU operations?

7. What is the function of the arithmetic-logical unit?

8. What operations are performed by ALU?

9. What primary components does ALU consist of?

10. What is the function of an accumulator / comparer?

III. Найдите в тексте английские эквиваленты следующих словосочетаний:

Функциональные блоки; устройство управления; арифметико-логическое устройство; управлять работой всей системы; получать команды; основная память; посылать сигналы; считывать команды поэтапно; таким образом; временно сохранять информацию; производить пометки через равные промежутки времени; последовательность операций; регистр памяти; регистр команд; адресный регистр; счетчик; датчик; дешифратор; адрес операнда; адресный регистр, высокоскоростной двоичный сумматор; по крайней мере; вычитание; сложение; умножение; деление; принимать решения; результаты сравнения.

Задание 3. Грамматические задания

V. Найдите герундий и переведите предложения на русский язык:

1. Fishing and fishing canning are important industries along the Pacific Ocean beach.

2. The Congress is responsible for making laws.

3. My illness prevented me from attending last nights concert at Lincoln Centre.

VI. Переведите предложения, содержащие Perfect Participle Active и Perfect Participle Passive.

1. Having finished the research the scientists made the analysis of the data obtained.

2. The designer left the office having looked through all the documents.

3. Having discussed the functions of storage units we passed on to the consideration of control processing unit.

4. Having limited the information capacity of a single bit to two alternatives the computer designers ex-pressed data by a combination of bits.

5. Having translated the program into machine language the computer architect put the program into the machine.

6. Having been coded the instruction was transmitted to the central processing unit.

7. Having been transmitted to the central processing unit the instruction made arithmetic-logical unit perform some computations.

8. Having been regulated by the operator the equipment operated well.

VII. Переведите предложения, содержащие независимый причастный оборот.

1. Data being accessed randomly, semiconductor memories are caged random access memory (RAM).

2. The information capacity of а single bit being limited to two alternatives, codes are based on combination of bits.

3. Primary storage having similarity to а function of the human brain, the storage is also called memory.

IX. Переведите сложноподчиненные предложения.

1. It is well known in computer science that the words "computer" and "processor" are used interchangeably.

2. The operation part of the instruction is decoded so that the proper arithmetic and logic operation can be performed.

3. It is difficult to establish whether this problem can be solved at аll.

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