So what you are saying is that it should not work?
It does.. I can easily see it by disconnecting the power to the control board. Then the ignition advance jumps to another position, and the ignition advance is (as good as) constant over the rev-range. With the board connected it varies with RPM.


There is a comercially availible ECU connected the same way, just connected in parallel to the stop switch to adjust ignition timing. Oddified ECU: http://www.oddified.com/services.php
The Oddified ECU does not let the user make his own curves, but it has a nice feature that there is no need for batteries, they are using some of the energy from the ignition coil to power the ECU. This is due to racing class restrictions I think.

I believe there is only one magnet on the flywheel, north and south is all i could get on the hall-sensor. By using a 'latched' hall sensor I get only one pulse/rev.