Computer Organisation and Architecture - Vol 3 | 28. Lecture – 35 by Abraham | Learn Smarter
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28. Lecture – 35

DMA (Direct Memory Access) transfer allows hardware devices to transfer data directly to and from memory without involving the CPU, thereby freeing up the processor for other tasks. This chapter discusses the need for DMA, its operational principles, and how it alleviates processor workload compared to programmed and interrupt-driven I/O. Additionally, it covers design considerations for effective DMA controller implementation.

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Sections

  • 28.1

    Computer Organization And Architecture: A Pedagogical Aspect

    This section explores Direct Memory Access (DMA) transfer, highlighting its significance in the input-output subsystem of computer architecture.

    Learning Practice

  • 28.1.2

    Dma Transfer

    This section explores Direct Memory Access (DMA) transfer, discussing its necessity, functionality, design issues, and operational principles.

    Learning Practice

  • 28.2

    Objective Of Dma Transfer

    This section covers the objectives and significance of Direct Memory Access (DMA) in computer architecture.

    Learning Practice

  • 28.2.1

    Describe The Need Of Dma Transfer

    DMA transfer is essential as it allows direct communication between memory and I/O devices, freeing the CPU for other tasks.

    Learning Practice

  • 28.2.2

    Demonstrate The Use Of Dma Transfer

    This section introduces Direct Memory Access (DMA) transfer, detailing its operation and significance in computer architecture by freeing the CPU from data transfer tasks.

    Learning Practice

  • 28.2.3

    Explain Design Issues Of Dma Module

    The section discusses the design issues related to Direct Memory Access (DMA) modules in computer architecture, emphasizing the need for DMA to facilitate efficient data transfer without CPU intervention.

    Learning Practice

  • 28.3

    Direct Memory Access Overview

    Direct Memory Access (DMA) allows peripherals to access system memory without processor intervention, enhancing performance by freeing CPU resources.

    Learning Practice

  • 28.4

    Dma Controller Functionality

    This section discusses Direct Memory Access (DMA) functionality, highlighting its need, operation, and design issues.

    Learning Practice

  • 28.4.1

    Role Of The Dma Controller

    The DMA Controller plays a crucial role in facilitating efficient data transfer between I/O devices and memory without continuous CPU intervention.

    Learning Practice

  • 28.4.2

    Interfacing With System Bus

    This section explains Direct Memory Access (DMA) transfer, its necessity, and its operation, outlining the benefits of minimizing CPU involvement in data transfer tasks.

    Learning Practice

  • 28.5

    Transfer Process In Dma

    This section focuses on Direct Memory Access (DMA) and its significance in data transfer processes within computer systems, detailing how it streamlines communication between memory and input/output devices.

    Learning Practice

  • 28.5.1

    Data Transfer Mechanism

    This section discusses the Direct Memory Access (DMA) transfer mechanism, emphasizing its importance in freeing the CPU from data transfer tasks between I/O devices and memory.

    Learning Practice

  • 28.5.1.1

    Starting Address And Data Count Setup

    This section discusses Direct Memory Access (DMA) transfer, explaining its necessity, basic operations, and the role of the DMA controller in data transfer between devices and memory.

    Learning Practice

  • 28.5.1.2

    Control Hand-Off Between Dma And Cpu

    This section explains how Direct Memory Access (DMA) operates to facilitate data transfer between peripherals and memory without CPU involvement.

    Learning Practice

  • 28.6

    Post Transfer Operations

    This section discusses Direct Memory Access (DMA) as an efficient data transfer method between memory and I/O devices, reducing CPU involvement during data transfer.

    Learning Practice

  • 28.6.1

    Interrupt Signal To Processor

    This section discusses Direct Memory Access (DMA) and its importance in reducing CPU intervention during data transfers.

    Learning Practice

  • 28.6.2

    Return Control To Processor

    This section discusses Direct Memory Access (DMA) transfer method, outlining its necessity, design issues, and how it enables the processor to perform other tasks concurrently.

    Learning Practice

  • 28.7

    Comparative Analysis With Interrupt-Driven I/o

    The section discusses the advantages of Direct Memory Access (DMA) over interrupt-driven I/O, highlighting how DMA allows data transfer without CPU intervention.

    Learning Practice

  • 28.7.1

    Context Switching In Interrupt-Driven I/o

    The section discusses Direct Memory Access (DMA), its purpose in improving data transfer efficiency by minimizing CPU involvement.

    Learning Practice

  • 28.7.2

    Efficiency Of Dma Transfer

    This section discusses the importance and operational mechanics of Direct Memory Access (DMA) in data transfer, highlighting its benefits over traditional I/O methods.

    Learning Practice

References

38 part a.pdf

Class Notes

Memorization

What we have learnt

  • DMA transfers data between ...
  • Using DMA can significantly...
  • The design of a DMA control...

Final Test

Revision Tests