21140 based cards

[Six thousand marmalade sand jelly <chris_(_at_)_dqc_(_dot_)_org>]

Do 21140 based cards (like the Znyx 4 port in particular...) support full
duplex operation?

ifconfig de0 mediaopt full-duplex gives me SIOCSIFMEDIA: Device not
configured.....

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Regard everything I say with suspicion; Regard every one of your own thoughts
with suspicion. For everything I think and everything you think could be a
blatant attempt to corrupt the scheme of things.