After digging through the code for the last year and define most of the unknown tables, recently I was busy with hardware breakdown.
I mapped almost all pins on the PCM and for most of them found the software addresses.
There is alot of unused input pins, AD pins, 1 freq input pins and some output control pins, pwm output pins. It wont be hard to add three more drivers for output control(but still need to find software input for them). There is still some work to do for couple of pins.

The mystery 3rd processor with mask id D84G, works with conjuction with the main eside processors and is reponsible for 4 freq inputs and knock count inputs. Also makes internal calc for speedometer and possibly drives the spark and injectors relays. It might have its own Rom or EEProm which needs to be read someway. I will be glad if someone can help read the 3rd processor internal memory.

The patching possibilities are endless and requests are welcome, testers also needed.

Alot of info to follow