[Battlemesh] [FCC] What hardware still works?

[David Lang]

On Tue, 23 Feb 2016, Juliusz Chroboczek wrote:

>> no, JTAG will not "always" work, many/most chips have a fuse you can blow
>> on them that will prevent part of the built-in flash from ever being
>> re-written.
>
> Wow.  How does that work?  What is it implemented for?

they actually blow a physical fuse in the chip.

It's implemented specifially to prevent the bootloader from ever being 
overwritten, locking down the device.

David Lang