4: Strategies and Interface I/O
Learning Objectives
At the end of this unit, the learners will
- Explain the Strategies of Interface I/O
- Distinguish between handshaking and buffering
- Understand the programmed IO mode of data transfer
- Describe a DMA transfer.
This section introduces the learners to the strategies of I/O interfaces. They include: polled, interrupt driven and DMA.
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- 4.4: Unit 4 Summary
- At the end of this unit, the learners will be conversant with the strategies of I/O interfaces. This involves accessibility of devices connected to the processor and where I/O transfers must take place between them and the processor. the various access methods, e.g. polling, interrupt and DMA. The interrupt process is also learned in this section.