Shouldn't be too hard... Check out https://github.com/espruino/Espruino/blob/master/README_Building.md
And compare https://github.com/espruino/Espruino/blob/master/boards/STM32F4DISCOVERY.py and https://github.com/espruino/Espruino/blob/master/boards/PICO_R1_3.py - shouldn't be too hard to add
@Gordon started
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.
Shouldn't be too hard... Check out https://github.com/espruino/Espruino/blob/master/README_Building.md
And compare https://github.com/espruino/Espruino/blob/master/boards/STM32F4DISCOVERY.py and https://github.com/espruino/Espruino/blob/master/boards/PICO_R1_3.py - shouldn't be too hard to add