I have a DSATX in my old carPC, and I am building a new one, using a M4-ATX. On the DSATX, the countdown timer is set via pots, or via programmable via a serial interface. It appears that the M4-ATX has the same feature, a programmable countdown timer. Both of these send a pulse to the MB on/pff switch when the time is up, after power on the ign (or ACC) line has dropped.
However, the DSATX has an additional feature, where if the countdown timer is running, and you short a jumper (on JP8) momentarily, it will drop the countdown timer to zero for that single shutdown sequence, and send the on/off pulse to the MB. Is there any way to replicate this on the M4-ATX?