On Fri, 4 Jun 1999 20:41:47 -0700 
 "Jeff Northon" <jeffo@sasq.net> wrote:

 > www2 /netbsd: pciide0: bus-master DMA support present
 > Jun  3 17:42:45 www2 /netbsd: pciide0: primary channel wired to
 > compatibility mode

It means that the chip is accessed at the legacy IDE chip registers, using
legacy interrupts, but you still get all the benefits of bus-master DMA.

It's mostly for the BIOS and/or OSs that can't cope with PCI IDE (i.e.
the chip would just appear as a regular old ISA IDE controller to them).

        -- Jason R. Thorpe <thorpej@nas.nasa.gov>