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All components of computer communicate with processor by the system bus. Which means I/O devices required to be attached to system bus. But I/O devices aren't connected directly to computer's system bus. In its place they are attached to an intermediate electronic device interface known as a device controller that in turn is attached to system bus. Therefore a device controller is an interface between a system bus and an I/O device. On one side it knows how to communicate with I/O device associated to it and on the other it knows how to communicate with computer's CPU or processor and memory via the system bus.
What is looping Loop is a control structure used to do repetitive operation. Some programs include repeating a set of instruction either a particular number of times or until a
How society is affected thorugh Internet Buying goods and services (for example banking) over the internet has both negative and positive aspects on society. These can be expl
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Disadvantages of DNC
Bring out the importance of hierarchy of operators? The operators within C are grouped hierarchically according to their precedence(i.e., order of evaluation). Operations w
What are the advantages of electronic payment system? Advantages of the electronic payment system are illustrated below: This gives good security schemes. Four important sec
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Determine the salient features of a parallel programmable interface, 8255. 24 I/O lines in 3 8-bit port groups - A, B, C A, B can be 8-bit input or output ports C
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Q. Show the developments that happened in third generation? The main developments that happened in third generation can be summarized as below: Application of IC circuit
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