We have learned that all computers have similar capabilities and perform
essentially the same functions,although some might be faster then others. We
have also learned thta a computer system has input, output, storage, and
processing components; that the processor is the "intelligence" of a computer
system; and that a single computer system may have several processors.We have
discussed how data are represented inside a computer system in electronic states
called bits.We are ow ready to expose the inner workings of the nucleus of the
computer system -- the processor.
The internal operation of a computer is interesting,but there really is no mystery
to it. The mystery is in the minds of those who listen to hearsay and believe
science-fiction writer. The computer is a nonthinking electronic device that has
to be plugged into an electrical power source, just like a toaster or a lamp.
Literally hundreds of different types of computers are marketed by scores of
manufactures.The complexity of each type maay vary vonsiderably,but in the end
each processor, sometimes called the central processing unit or CPU,has only
two fundamental sections;the control unit and the arithmetic and logic unit.Primary
storage also plays an integral part in the internal operation of a processor.These
three -- primary storage, the control unit,and the arithmetic and logic unit --
work together. Let's look at their functions and the relationships between them.
百度搜索计算机英语教程第五版翻译