AMD PCNET: Difference between revisions

== DMA Descriptors ==

The PCNET cards use a series of descriptors to handle DMA.

struct pcnet_descriptor {

uint32_t address; //physical address of buffer

uint16_t length; //length of buffer (rx) or length of packet (tx)

uint16_t status;

uint32_t flags;

uint32_t user;//can be used to store whatever value you want, such as the virtual address of your buffer

};