(also edited in more above)
Communication options has a check box for throttling uploads. It makes uploads agonizingly slow, but sometimes fixes problems while uploading code.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
What?
Is there a diagnostic test that can be performed to detect the chip problems
in the high 16k of memory?