Why does the floppy drive use DMA?

Discussion in 'Computer Support' started by Will Hay, Feb 18, 2004.

  1. Will Hay

    Will Hay Guest

    Just curious but I thought DMA was intended for high volumes of data - also
    why do some sound cards use 2 DMA channels? - question turned up in a A+
    class and no one knew why the floppy used DMA apart from the fact that it
    bypassed the CPU to access memory.

    Thanks
     
    Will Hay, Feb 18, 2004
    #1
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  2. Will Hay

    ICee Guest

    Is it possible you mean IRQ?
     
    ICee, Feb 18, 2004
    #2
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  3. Will Hay

    Unknown Guest

    DMA is ideal for anything low speed because it frees up an interrupt level
    (none needed) and the processor need not waste any time with it. Some sound
    cards need 2 DMA channels for speed.
     
    Unknown, Feb 18, 2004
    #3
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