Hello.
Mark Mitchell wrote:
Do all PCI devices use DMA or is that devices specific?
This is device specific of course, but I think most of them do. For example recently added PCI/VESA driver for dosemu can drive the PCI/AGP video boards quite well - they use DMA for 3D acceleration in most cases, but who cares about 3D accel under DOS. Doing grep DMA /usr/src/linux/drivers/net/eepro100.c gives you an idea that your NIC really use it.
Your right about the packet driver, that should work but if my PCI Channel card uses DMA I'm pretty much screwed right?
No, the packet driver will work in any case. Direct access will not, but who cares if the packet driver does the trick.
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