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One-Fragment Mode
5-6
5.3 One-Fragment Mode
When the GO command is given on either transmit or receive, ThunderLAN
DMAs the whole list, even though the driver only uses a limited number of frag-
ments on that list.
In the case of a receive list, the driver has the option to force ThunderLAN to
DMA a one-fragment list. This is accomplished by setting the One_Frag bit in
the NetConfig register to 1. In one-fragment mode, ThunderLAN only needs
to DMA a 16-byte list instead of an 88-byte list. This helps to cut down on PCI
bandwidth use. Currently, there is no one-fragment mode for transmit.