I can't remember correctly, but with Mediator4000Di you can set a jumper if you use a Z3 gfx card. So maybe DMA works with CV64, but I haven't tested it.
Certainly not. If you can translate PCI DMA cycles directly to Zorro III DMA cycles (as you would need to get into the CV64 memory), then you better do directly DMA to the system memory - why waste time and resources on the CPU with the PIO transfer from CV64 memory to system memory?.
As I have read several people's posting in the past years which have similar configurations and a Buster 7 chip, I would bet that there is no direct PCI-Zorro III DMA conversion with Mediators (remember: Buster 7 does not support Zorro III DMA at all).
Michael
