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   tp_pcserial() - configure normal PC serial port

   tp_pcserial(nIRQ)

   nIRQ        IRQ (interrupt request) number.

   Configures Telepathy to recognize standard PC serial ports attached
   to an IRQ.  This is the default setting for all IRQs initially, but
   can be changed by configuring a multi-port card.  tp_pcserial() lets
   you restore the default configuration.  After calling tp_pcserial(),
   you must use tp_setport() to reset each port on that IRQ before they
   can be used.