Thread: Convert Garmin DEZL 760 LM to RV 760

Sure Dave, just use [Only registered and activated users can see links. ], but only as a guide, substituting the dezl760 boot.bin and the RV760 fw1_resources.bin & fw_all_.bin [combined or hybrid, 1st method]. Or you can use the full flash 2nd method if you're brave. Flashing the full RV software will change the HWID to 1730 and it can be updated normally with GarminExpress or WebUpdate for future firmware versions.

Using the 1st method with hybrid firmware using original dezl boot.bin and HWID override in RGN_Tool to keep it as 1516 is safer intrinsically though.

PS: Welcome to GPSPower, just noticed it's your first post. Good luck and post again if you're unsure of anything. Don't try it if you don't understand what's going on, ask first.

Hey Neil...

Thanks for the response...
So I have questions... Copied everything from the 2 drives that show up when I connect the dezl 760 to my computer and after I unhid the hidden files... So if this is correct I should be able to restore the files to the unit and still have a working unit... If I am reading how to backup the important file "region 41" there is not actually a file named that... You have to separate it out of the gupdate.gcd file using the rgn tool...
Sooooo. Is this as simple as making a "new" gupdate file after separating out the boot.bin from the dezl 760 gupdate.gcd file and the fw_all.bin and resources.bin from the latest RV 760 file from Garmins web site RVandCamper760_480.gcd combining the 3 files into the .gcd then overwriting the one on the GPS and then giving it a reboot...
Also if I ever wanted to go back to the factory settings just overwrite with the original gupdate.gcd???

I could just be delusional... Thanks for the help...

Originally Posted by jprod

Hey Neil...

Thanks for the response...
So I have questions... Copied everything from the 2 drives that show up when I connect the dezl 760 to my computer and after I unhid the hidden files... So if this is correct I should be able to restore the files to the unit and still have a working unit... If I am reading how to backup the important file "region 41" there is not actually a file named that... You have to separate it out of the gupdate.gcd file using the rgn tool...

Slightly delusional Dave. Good you made a files backup. Correct that Region41 isn't a 'file', it's a region and regions are part of the unit's non-volatile internal flash memory. The name is a nod to the fact that the Garmin memory is divided into sections known as regions. They can't be seen in Mass Storage mode like the visible file system or copied like that either, however even the file system is a 'region' and it's region 83 in your unit [don't worry about that now though]. So, also region41 cannot be 'separated out of the gupdate.gcd file' because it isn't in here [it's just not part of the firmware either]. It can however be copied as a *.bin file using SD txt commands. Read up about that here: [Only registered and activated users can see links. ].

Sooooo. Is this as simple as making a "new" gupdate file after separating out the boot.bin from the dezl 760 gupdate.gcd file and the fw_all.bin and resources.bin from the latest RV 760 file from Garmins web site RVandCamper760_480.gcd combining the 3 files into the .gcd then overwriting the one on the GPS and then giving it a reboot...

Nup. Read my initial reply above again and also that tut for 2460>dezl560 very carefully. Please don't attempt anything until you've fully understood the process. You've got right the bit about combining the 3 bin files, however not correct about making a gcd file. They're combined into an rgn file which is then flashed in pre-boot mode using Updater.exe. So, rather than overwriting it, you need to remove any existing gupdate.gcd file before you flash the rgn file.

Also if I ever wanted to go back to the factory settings just overwrite with the original gupdate.gcd??? .....

Only if you retain the existing HWID can you then use a higher version dezl760 gupdate.gcd file to revert back to original dezl.

Read and read again until you understand mate or you will have an expensive paper-weight. We'll be happy to help you in more detail but only if you know basically what you're doing. No one here can take any responsibility for an adverse outcome because the actual process is entirely in your hands. It's safe enough if done properly though. I just need to be sure that you have the basic principles nailed down before giving any more detailed help.