Originally Posted by Schoenfeld
True. However, no bus board has any memory, which is why the GFX card's memory serves as a temporary buffer for the networking card. The CPU then needs to poll the data from that memory (or vice versa; CPU places data into GFX memory and tells NIC to DMA things from that mem). That's the detour I wrote about earlier.
Ahh.. ok.. well, obviously the gfxram is accessible through PIO then, and is an exception to the rule you stated that generally, pci chipsets only support dma.. all settled then and I shall stop polluting this thread any further with my technical ranting ;-)
thanks for clearing that..