grbl/grbl — pull request #369 by daid (2014-03-08 07:51:12+00:00)
Title: Change the interrupt handling to better support chips with more then 1 UART

I've made a small change to how the serial interrupt vectors are defined. This because I tried to compile the code for an ATMega2560, and the interrupts did not get properly defined then.

The below change works because interrupts are defined as "_VECTOR(??)" in