How do you exorcise a haunted TNC?

["Mike Bilow, mikebw@ids.jvnc.net" <mikebw@IDS.JVNC.NET>]

With regard to the 16550 chip, setting the FIFO Trigger Level and so on
to one does not disable the FIFO.  The FIFO has verious operating modes
which allow decreasing the interrupt processing overhead of the CPU by
having the chip request CPU service after 4 or 12 bytes, instead of
after each byte is received.  If this service is not provided, then the
bytes will be stored in the FIFO, up to 16.  There is a trade off here
between the CPU overhead and the margin for error: as one increases the]
other must decrease.

You can display the current state of the FIFO with the "asystat" command.

-- Mike