I don't see a problem of driving two processors from one CMOS oscillator if the oscillator has a buffered output. (You cannot legitmately drive two processors from one crystal however). Although I have seen some kludgey designs that put the crystal on the X1 & X2 pins of one processor and then connect that X2 pin to the X1 pin of the second processor.

As far as fundamental / versus 3rd overtone crystals...

No......you need to look at the crystal specs. "almost all" is not a assurance that
you will end up with the correct type of part.

The reason that fundamental crystals are specified is that the X1 X2 oscillator curcuit on these parts is designed with drive capoacity to make a crystal run in fundamental mode. If you attached a 3rd overtone 32 MHz crystal to your Dallas part there is a good chance that it may try to oscillate at 10.666666 MHz. In the worst case it may run at 10.666 MHz sometimes and at 32 MHz at other times. The oscillating frequency beig determined by variations in the power supply as the board is turned on.

Michael Karas