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Authors:
Linda Null ,julia Lobur
Chapter:
Marie An Introduction To A Simple Computer
Exercise:
Review Of Essential Terms And Concepts
Question:33 | ISBN:9780763704445 | Edition: 3

Question

33. How does interrupt-driven I/O work?

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Answer

Interrupt-driven I/O :

  • Interrupt driven I/O is an approach to transfer data between 'memory' and 'I/O devices' through the 'processor'.
  • The other two techniques for the same are programmed I/O and direct memory access (DMA).
  • The interrupt-driven I/O involves the use of interrupt to exchange data between I/O and memory.
  • Interrupt driven I/O is an alternative scheme dealing with I/O. Interrupt I/O is a way of controlling input/output activity whereby a peripheral or terminal that needs to make or receive a data transfer sends a signal. This will cause a program interrupt to be set. At a time appropriate to the priority level of the I/O interrupt. Relative to the total interrupt system, the processors enter an interrupt service routine. The function of the routine will depend upon the system of interrupt levels and priorities that is implemented in the processor. The interrupt technique requires more complex hardware and software, but makes far more efficient use of the computer’s time and capacities. 
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