lkml.org 
[lkml]   [1996]   [Jun]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: Alan's bug catalogue
    >     Matthias> With more than 16 MBytes? You obviously won't have a
    > Matthias> probelm obtaining DMA memory if you have 16 or less...
    >
    > I have exactly 16Mb. I don't see how having more memory makes it more
    > difficult to find spare DMA pages, but what would I know? :-)

    the isa bus can't address more than 16mb of memory, therefore if you have
    more than 16mb, dma transfers can only be completed into the lower 16mb.
    If a buffer is located at 17mb, the transfer will have to be double
    buffered- dma'd into a portion of memory below 16mb, and copied to the
    portion of memory above 16mb.

    Brian Pape
    bpape@ezl.com
    bpape@bill.gates.will.turn.the.internet.into.a.total.wasteland.org



    \
     
     \ /
      Last update: 2005-03-22 13:37    [W:0.019 / U:0.192 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site