Thread: Running programs from SD on nuvi

Originally Posted by Raupe

............
So with the tool I have the files :
127.bin
158.bin
Just converted the hex addresses in the name of the files created by RNG tool to decimal.

The file 14.bin could not be generated in this way. These I brought as described in post #125 with rrgn from the device to the card.

What do you mean by it "could not be generated in this way"? RGN_Tool can extract fw_all (14.bin) from a GCD or RGN firmware file in exactly the same way as it can extract 127 & 158. Do you mean you've generated a firmware BIN file by dumping region 14 from the device using "rrgn,14,2/14bin"? If so, you'll be flashing back the exact same data for the main system software to region 14 (hex 0x0E) and if that's the case, what's the point?

From my point of view I have now everything together

The update.txt has this content :
....................
and is located in Garmin/updater/1772/update.txt
There is also the Ldr.bin .

Could this work, can I have made a mistake ?

Certainly the txt commands are correct to delete any gupdate.gcd file from .System, dump the nonvol memory to the card and rewrite data to the 3 fw regions from the card. So yes it will work provided you're using the right Ldr.bin in the HWID folder made from the correct 1772's boot.bin extracted from the appropriate firmware. However, again, what's the point? Even if the GCD in .System was corrupt, it's not being initiated anyway. If it was corrupt and initiated the device would be soft-bricked and stuck on the logo splash screen.

Please explain precisely what you wish to achieve as i must be missing something as to your ultimate intentions. If you're simply doing this as a practice exercise for updating future firmware versions it would be far simpler (and much safer) to do higher version updates with a GUPDATE.GCD in a Garmin folder on a microSD.