User`s guide

10 - 2
Communication Ports
There are two ways to access the GPS module: through the actual COM port, which is COM7 or the GPS
Intermediate Driver. Which method you use depends on the software application you are using. If the
software application requires the actual COM Port, set the operating system to use COM7. If the software
application requires the GPS Intermediate Driver, set the operating system to use the GPS Intermediate
Driver.
Selecting the Port
1. Tap Start > Settings > System tab > External GPS.
2. In the GPS program port: drop-down list, select COM7 or GPD1 (the GPS Intermediate Driver) as
required by the application.
3. Tap OK to save.
COM7
COM Port 7 can be set to the following baud rates:
• 4 8 0 0
• 9600 (This is the default baud rate and recommended for optimal GPS functioning.)
• 1 9 2 0 0
• 3 8 4 0 0
Other baud rates are not possible. The baud rate selected on COM7 is the actual baud rate with which
the GPS will be communicating.
GPS Intermediate Driver
When the first user of GPD1 opens the port, the GPS Intermediate Driver in turn opens port COM7. The
GPS Intermediate Driver allows multiple applications to open GPD1, and the GPS data is broadcast to all
open ports.
When the GPSID driver is in use, the COM7 port is allocated to GPSID as READ|WRITE. (COM7 is still
available for access mode of 0.)
For more information about Microsoft’s GPS Intermediate Driver, follow this link: http://
msdn2.microsoft.com/en-us/library/ms850332.aspx