Pause the print process ? (1 reply)

Suppose I had designed an electronic filament detector that
gives a LOW signal or a HIGH signal (5 Volts or 3.3 Volts)
in case the filament broke ....

How would I make the Microprocessor on my printrboard
(or teensylu or ramps or other)
PAUSE AND REMEMBER THE CURRENT XYZ POSITION

And how would I make the Microprocessor continue
executing the Marlin Firmware
FROM THIS XYZ POSITION ?

(this should work during both, SD-Card printing and USB printing)

Has Marlin already built in such pause function
listening on a dedicated Arduino PIN ?

thanks
Gerald