hello, wanted to ask if there is any way to debugger the garmin firmwares.
All GPS have a debug mode screen. I wanted to know if there is any way to read the registers and put some breakpoint through usb port.

Another option would be to resort to more complicated OCD, on-chip debugger. Through the JTAG port, and using compatible hardware (FT2232) and OpenOCD software.

Through these systems could be programmed and also the nvram bootblock, if we have a garmin brickedd.

I hope someone can provide some information.
A greeting.