The Von Neumann Model

The man you see before you is  John von Neumann, an early computing pioneer. From what I've read so far I can establish that this guy is a pretty big cheese and is credited with the general model that computers are constructed by today. I plan to do a outline history of computing soon with all the major players and their contributions so if you were expecting an interesting article on all of von Neumann's contributions you will have to wait till I write that as this article is actually just an introduction to his 'model'.

John von Neumann

As far as writing about Neumann's life goes my knowledge of him is pretty slim at this moment in time, I will however, in the future plan to do an in-depth piece on him, for now however I am more concerned about his contribution to computer science and what that contribution means to me and you.

 Essentially von Neumann established a model that computers should follow that was logical and effective in its design. This 5 part model describes the form your computer takes underneath all of its hardware and shiny cases.

 Neumann states;

 There are Five major components within the computer system:

 The first is an Input Device

              - This element sends data and information to the system. This information and data is then stored in the next component.

 The Memory Unit

              - The instructions and data are then processed by the next component.

The Aritmetic Logic Unit (ALU)

             - The operation carried out within the ALU are carefully guided by the next component.

The Control Unit

             - To which the results of the ALU and Control Unit's work is sent to the final component.

The Output Unit.

             -Which would be your monitor or your printer.

 This simplified breakdown of what a computer is made up of makes its a bit easier to grasp harder concepts in computer architecture as it allows you to picture in your heads the basic outline of the computers structure. This however is an unfinished model and if we were to add a bit of extra detail to make it a little more complete and a little bit more accurate to today's computing systems we would have to mention the System Bus Model.

  As mentioned previously in another article (here) a bus is basically a method to quickly transport data from one component to another. The system bus model essentially partitions a computer into three sub-units:

 CPU / MEMORY / I/O

These three sub units are the five units established in the von Neumann model only grouped by their purpose.  This refinement of the von Neumann model combines the ALU and Control Unit into one functional unit - CPU. This model also combines the Input and Output units into a single I/O unit.

 The system bus links all these components on a shared pathway made up of:

The Data Bus - Carries the information being transmitted

The Address Bus - Identifies where the information is being sent

The Control Bus - Describes aspects of how information is being send and in what manner

:)

-As I have mentioned previously I will update older articles as my understanding of the concepts within develops so if you find this a rather breif introduction to von Neumann and the basic form of the computer, do not worry I am learning all the time and will update when I have found anything considerable to add. If you have anything else you believe to be worthwhile drop us a comment and I'll add it in. Thanks.