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The Von Neumann Machine

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  • Essay length: 4043 words
  • Submitted: 30/08/2003
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AS and A Level Computer Science

The first 200 words of this essay...

Von Neumann Architecture

The Von Neumann Machine

All modern computers are based on the ideas proposed separately by

John von Neuman and Alan Turing in 1945. They suggested the

stored-program concept. The proposal was that the program instructions

that are to executed and the data that are to be processed should both

be stored in memory together. This implies that a program must be in

memory before it can be executed. Computers based on this design are

known as von Neumann machines. A von Neumann machine performs what is

known as the fetch/execute cycle.

Internal components of a computer system are:

Ø Processor - the part of the computer system that executes the

programs

Ø Memory - high-speed storage for programs and data

Ø Interfaces - to connect external devices (called peripherals)

Ø Clock - to provide timing signals

Ø Buses - to connect together all the above into a computer

system

Buses

A system bus is simply a number of wires

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