I am posting this just for easy reference, so we can find this all in one place. The Northstar ignition module wiring and the signal waveforms going in and out of it.
northstar ign_module.jpg
northstar3-2.png
Hope this answers more questions than it creates. During startup, no 5v signal is sent to the BYPASS input until after 400rpm, where 5v makes the module switch to computer ignition control. From then on, the computer has direct control as to WHEN the next coil is going to fire. The module keeps track of WHICH one to fire.
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