Subject

    Computer Science

    Topic

    Computer Hardware

    How many low-DMA channels are on the original AT’s first DMA controller?

    a)
    3
    b)
    4
    c)
    7
    d)
    8

    Explanation

    The AT architecture has 8 total DMA channels using two controllers. The original/“low” controller provides four (0–3); the second adds 4–7.

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