A timing belt failure wouldn't cause your accessory drive to quit working. Just wondering, did the little red battery light come on? If it did what your describing is that your alternator belt snapped not timing. Also if it was your timing belt you could tell just by pulling off the drivers side timing cover, it's that black piece of plastic on the front of the motor, held on by just a couple of bolts. After that have someone crank the car while you watch to see if the cam gears are turning. Also if your belt did fail you better start shopping for motors because these are interference motors which means your pistons will have come in contact with the valves and your motor is essentially toast.
FP GT35R MoTeC M800 AndrewTech PPG'd Wagon - 513AWHP
06 Mazdaspeed6 280/330