You need a port splitter.
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The setup for TyTN II is similar to that WiKi.(PocketPC Setup Guide to use Malsing maps) The virtual Com Port sets at COM1 GPS Com Port sets at COM4 Garmin Protocol Output sets COM1 Once you start the GPSProxy and get a lock on the satelite, start Garmin Que, no setup needed, you are ready for a ride.