Thread: Bricked my nüvi 1490...

Now we know that 972's boot.bin always crashes, even if we [Only registered and activated users can see links. ] it to load update.txt (tests in posts #22 and #16 have failed).

But we do know that 827's boot.bin doesn't crash (test in post #16).
So we could use 827's boot.bin to execute update.txt with something like this:

Code:

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Where 1:/5.bin and 1:/43.bin are the 972's bootloader and the 972's x-loader respectively.
We can extract them from boot.bin or dump them from a healthy device (I prefer the latter way).
But the problem is, flashing regions 5 and 43 is disabled in the xrgn command handler. So we have to patch boot.bin to remove this limitation.

smokefree, please dump regions 5 and 43 from a healthy 14xx using [Only registered and activated users can see links. ] and post them here.
It's a normal region dump procedure, not dangerous if you use the right ldr.bin

lolypop000, I predict that "xrgn,12,1:/Garmin/12.bin" won't work. Guess why? It's because you're requesting to rewrite boot.bin in the RAM, while it's being executed. It will fail for sure.

Originally Posted by kunix

dump regions 5 and 43 from a healthy 14xx using

[Only registered and activated users can see links. ]

and full dump, except user partition from 1490 ( 0972) [Only registered and activated users can see links. ]

ps Overwrite memory would have been in the programmer and forgotten.