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PC DVD drive fails in DMA mode

Discussion in 'Electronic Design' started by Luhan Monat, Apr 4, 2005.

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  1. Luhan Monat

    Luhan Monat Guest


    My LiteOn DVD burner fails (reading) when put into DMA mode (and runs
    real slow if I run in PIO mode). Any possiblility of reprogramming the
    8237 (style) DMA controller for a wait state or two? Or any other
  2. Joel Kolstad

    Joel Kolstad Guest

    I've had a PC slowly corrupt a hard drive from being set to 66/100 -- this
    was in the early days of such drives/motherboard combos, though, so I can't
    complain _too_ much. (I'd have felt far worse with the early motherboard
    with USB that that silicon bugs that simply couldn't be worked around in
    software -- at least with the hard drives, DMA33 worked and was still faster
    than the drive could transfer data anyway...)
  3. Luhan Monat

    Luhan Monat Guest


    Changing the IDE drive cable BIOS setting from 66/100 to 33 (Mhz?)
    totally fixes the problem.
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