Quote: Originally Posted by cherrybomb
I thought that most GPS software just acted upon the NMEA sentances as they arrived from the device?
Or is it a message/response mechanism?
No, GPS mice dump data to the serial port. It's my understanding that lots of NMEA only devices dump at 1Hz, so lots of GPS software reads at about 1Hz. With Sirf chipsets, you get a much higher data rate, software just hasn't caught up.