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Monday, May 16, 2011

What is bus in computer architecture? [HSEB 2059]

= [Better to draw figure from book.]
The bus is a medium used to transfer data and controls from one part to other part of computers. Data is normally transferred between main storage and the processor along a device called a bus which is effectively a means of sending multiple bits of data in parallel.
There are mainly three types of bus:
(a) Data bus,
(b) Address bus,
(c) Control bus,
a) Data bus: (i) A bus which carries a word or a data to or from memory is known as data bus.
(ii) The data width is 8 in 8085, 16 in 8086 and 32 in 80386.
(iii) Data lines are bidirectional.
(iv) One part of the data bus runs between RAM and the microprocessor.
(v) Another part of the data bus runs between RAM and various storage devices.

b) Address bus: (i) The address bus carries memory address.
(ii) The address lines can be 16 in 8085, 20 in 8086 and 32 in 80386.
(iii) It is unidirectional, the bits flow in only one direction.

c) Control bus: (i) The control bus carries the control signals between the units of computers.
(ii) The signals like READ/WRITE, START/HALT etc are carried by a control bus.

8 comments:

  1. Nice! I have got a clear idea about computer bus structure!! Thanks....

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  2. THANK U FOR MAKING ME EASY TO KNOW IT.

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  3. This comment has been removed by the author.

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  4. This is all i need in this man's assignment

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  5. what are the Difference between the tree computer buses

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  6. Great! I have got a clear idea about computer bus structure!! Thanks

    ReplyDelete