Thread: Etrex 20 and 30 : an easy way to get into pre-boot

Originally Posted by skiiermike

..Are there good firmware's that exist for the 20 and 30?

Yes, for example, installing the patched firmware that unlocks access to georeferenced images Birdseye (JNX format) that does not come from the Garmin website (service subscription), that is, you can prepare and use your own raster images of scanned maps, google earth... In this case it is not necessary to install the firmware at pre-boot.

Read about the JNX standard here:

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and about the Alex Whiter firmware patcher:
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