Noticed that the Mercury marine digital EFI Race boxes used a 28 pin removable chip, so I got a bit curious...

Pulled the attached bin off the chip. 64kb. Scrolling through the 3d Data viewer there are definitely some tables that look like the correct fueling profile for a 2 stroke. This particular ECM used a MAP only, no TPS or any other sensor, other than RPM input. There was also no control of ignition, that was all mechanically controlled by a linkage and trigger.

Anyhow, let me know what you guys can see in this hex file and post up. I have no idea where to start writing an XDF for this because there's no hack, only comments(?) So I am open to any suggestions.