[lkml]   [1996]   [Jun]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
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

 \ /
  Last update: 2005-03-22 13:37    [W:0.071 / U:1.928 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site