Re: Alan's bug catalogue

Brian Pape (bpape@ezl.com)
Tue, 4 Jun 1996 23:45:41 -0500 (CDT)

> 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