ous system of our society.
The versatility and convenience of the microprocessor has changed the entire architecture of modern computer systems. No longer is the processing of information carried out only in the computer's central processing unit. Today there is a trend toward distributing more processing capability throughout a computer system, with various areas having small local processors for handling operations in those areas.
There are a number of advantages of distributed processing. First, .since many elements of the computer can be working on different portions of the same task, the work may be done faster. Second, if one element in the network malfunctions, its workload can be shifted to another element or shared among several elements, so that the entire work is relatively immune
109 Unit 8. Central Processing Unit
to failure. Third, the network can be small enough to be contained within a single laboratory or building, or it can be spread out over a wide area.
1. Вставьте необходимые слова вместо пропусков.
1. Programs and data to be processed must be in the____________
,a) internal; b) external; c) secondary
2. The control unit_________ instructions from the program.
a) sends; b) changes; c) obtains
3. The results of arithmetic operations are returned to the
_____ for transferring to main storage.
a) decoder; b) counter; c) accumulator
4. The instruction to be__________ in control unit is read out
from primary storage into the storage register.
a) calculated;Jb) executed; c) read out
5. The______ performs logical comparisons of the contents
of the storage register and the___________ .
a) adder; b) accumulator; c) comparer
6. The read out command is passed from the____________ regis
ter to the________ register.
a) instruction; b) address; c) storage
7. CPU is designed to________ and to_______ basic instruc
tions for the computer.
/a) control; b) consist; c) carry ouU
8. CU and ALU consist of electronic circuits with millions
a) sensors; b) servers; c) switches
2. Согласуйте слова левой колонки с их интерпретацией,
1. CPU f/- -a) performs the processing operations;
2. CU ^ -b) carries out logical comparisons of stor-
3. ALU С -с) executes basic arithmetic functions;
4. accumulator; d) coordinates the operation of the whole