I have now (finally!) successfully read the firmware from my two BT338 and a TomTom Mk2 BT mouse. Also important to notice is the following:
- Address Range is 0x0 to 0x7ffff (4 times an "f") resulting in a 512kB bin file.
- Any other speed than 38400 will NOT work!
Did not dare yet to flash actually... I have now:
BT338 (NaviLock labled in Germany)
I know there must be newer one for BT338 as you can see from the FAQ at Globalsat USA at: http://www.usglobalsat.com/gpsfacts/...gps_facts.html
The mention even different versions there (QA 38):
I noticed that reading out the SW sometimes delivers different results after 7d008 when some time has passed. I suspect that some data is stored there which may vary over time (satelite positions, routes or whatever may be stored depending on the time).