On Wed, 27 Jan 1999 14:01:15 -0500 (EST) 
 Jason Wright <jason@thought.net> wrote:

 > The 'hme' and 'qec' fall into the category of needing to manually frob a
 > control register based on the status of duplex in the PHY.

Is the "qec" the MAC?!  I thought it was the DMA engine/interrupt glue.

It may certainly be the case that no MACs that come connected to "qec"s
support full-duplex operation.

        -- Jason R. Thorpe <thorpej@nas.nasa.gov>