Weird that same port same pin does not bother firmware, but same pin of different ports does. Multiple watches on the same pin - with different setups - could have some advantages. One watch could be the counting the changes, two others the rises and falls, and three more the first changes. To make that possible, all would have to be in the firmware. If the hardware has to be setup, then different setups are contradictory, and the last setup would win.
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.
Weird that same port same pin does not bother firmware, but same pin of different ports does. Multiple watches on the same pin - with different setups - could have some advantages. One watch could be the counting the changes, two others the rises and falls, and three more the first changes. To make that possible, all would have to be in the firmware. If the hardware has to be setup, then different setups are contradictory, and the last setup would win.