Ignition questions again (CDI vs DME)

[CamB]

This is purely to help my understanding of ignition systems. I don't have a problem (yet ).

So, I understand:

1. Points and coil
2. Optical or magnetic trigger and coil

And I get both of those working through capacitive discharge.

This covers me right through 911s from 65 to 83.

So how does the ignition work with DME????

I know there is a crank sensor (or flywheel, whatever) for triggering. It still has a coil. It still has a dizzy. Is there any capacitive bit though?????? If not, why doesn't it need it?

And a quick description of the 964 ignition would be pretty useful too .

Thanks! Cam

[CamB]

Anyone, anyone? Bueller?