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How does DMA work?

I have newer used DMA and I just wondered how it works. Can it be used to move from one memorylocation to another and in that case how? Sourcecode would also be nice:)

Thanks.


Distance


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  • : I have newer used DMA and I just wondered how it works. Can it be used to move from one memorylocation to another and in that case how? Sourcecode would also be nice:)

    : Thanks.


    DMA mem-to-mem doesn't work on modern computers. To see if your

    computer does support it, go to my webpage, listed

    below, go to the Turbo Pascal, section and download the

    file called "Lot's o source" inside that is a program

    straight from a hardware book on the DMA chip, which will

    test if your supports DMA.

    As it is, with modern comps, DMA is slower than usual methods,

    and messes with multi-tasking as it denies the CPU access to memory

    for the duration.


    Matthew Gross

    Acheron@Hotmail.com





    URL:http://acheronx.resnet.tamu.edu/home/

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