NMEAsync is a 32 bits console application that uses the data supplied by a GPS
receiver to synchronize the date and time of a PC running Windows.

The GPS receiver must generate NMEA sentences, and be connected to
the PC using a serial cable.

NMEAsync uses the "$GPRMC" NMEA sentence to obtain the current date
and time.

NMEAsync returns an errorlevel 0 if everything went OK, and a positive
value otherwise.

NMEAsync is freeware.