I searched the Beltronics forum using "volts" and "voltage" as keywords, didn't get an answer, so I'll just ask at this point:
The 940 obviously monitors voltage, since it'll display a "LOW VOLTAGE" message if its startup sequence is interupted by a large current draw -- this happens if it is hardwired, left on constantly, and the car is started. The 940 comes on when the key goes to "ON" and then is cut short as the key goes to "IGN" since the current draw makes it want to reboot. Before the reboot, its last gasp (before springing back to life when the motor starts running) is "LOW VOLTAGE."
Does this mean the voltage metering HW is present just as on the 995 etc., but it's a software or firmware issue to get it displayed? If so, how does one go about getting the voltage displayed?