We have been having problems for months with DMA on NetBSD/EBSA-285, and are
slowly ruling out various issues. The next issue we need to try and rule out
is a backplane problem. If you have successfully used DMA over the PCI on
the EBSA285 (through NetBSD or another means), please could you let me know
what Make and Model of backplane you have used. We would like to get our
hands on one, so we can see if this is perhaps the problem.

Thanks
 Bruce