Messages in this thread |  | | Date | Tue, 4 Jun 1996 23:45:41 -0500 (CDT) | From | Brian Pape <> | Subject | Re: Alan's bug catalogue |
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> 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
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