Here's a very rudimentary logger I wrote for my own use. It's not very pretty but someone else might find it useful. As like other programs I've made available here, it's only hobby quality software offered with no guarantee of performance. It runs OK on my Thinkpad Windows XP machine.
The data file is Log.txt created in the executable directory. You can log the data either in parsed or NMEA format.
Parsed: Windows UTC date per local settings
Windows UTC time per local settings
Latitude
Longitude
Course Over Ground (true)
Speed Over Ground (knots)
The default baud is 4800.
--- CHAS