Thread: About 37xx converted to 34xx satellites reception accuracy

Originally Posted by kunix

Looks like I've found why original 37xx bootloader doesn't work with 34xx firmware (Alviora, thanks for helping me with tests!).
I believe it's because 34xx firmware is too big, so the 37xx bootloader crashes while reading it. This also explains why some older 34xx firmware versions work fine with 37xx bootloader.
This issue could be fixed by compressing 34xx firmware and adding a special loader which would decompress it when executed. In a few weeks I will probably finish that piece of software and post here something for testing.

I'm using bootloader from 3490 on my ex 3790 and never have had any problems. What advantages of using bootloader from 3790 instead of 3490 bootloader?

Originally Posted by voyager56

I'm using bootloader from 3490 on my ex 3790 and never have had any problems. What advantages of using bootloader from 3790 instead of 3490 bootloader?

I know at least two reasons:
1) angelozip wants to check if 34xx firmware has better GPS accuracy with 37xx bootloader.
2) I consider flashing 37xx with 34xx boot.bin quite dangerous. As far as I remember 37xx prints "System Software Missing" in white color while being flashed with 34xx RGN. I have only one explanation for this fact: 34xx boot.bin crashes after flashing 34xx bootloader and the device reboots immediately and executes the new bootloader, which in turn reads the old firmware and finds that its HWID is wrong, then prints the message and enters pre-boot mode. Then updater.exe continues flashing the rest of RGN with help of bootloader (yes, with some nuvis you can remove boot.bin from RGN file and still flash it normally, as bootloaders can flash some regions).
Now guess what happens if for some reason 34xx boot.bin crashes a few moments earlier, while flashing 34xx bootloader?
Also once I've bricked 34xx by flashing it with 37xx boot.bin.