When I try to update the firmware of my FEZ Cobra I get a “Signature FAIL” message on the device. The “FEZ Config” app says “EMX Updating Failed!”.
Any ideas?
You can update your EMX by hand with Teraterm.
I have no Cobra I, only a Spider I, but they have the same base board EMX.
https://www.ghielectronics.com/docs/54/loader-tinybooter-g120-and-emx-families
I hope the information helps.