is here

. Defining VER_046 and compiling in cc65 should generate the same sound engine as in official FamiTracker 0.4.6, otherwise the NSF driver should be identical to version 2.11.

This is done by reverse-engineering by hand for roughly 6 hours, instead of waiting for over 2 months (some 1500 hours) and still not seeing any update on the FamiTracker download page.

I have no need for this but is quite inspiring how you choose to tackle your problems