I have got the first sine wave out of the OPN (FM synthesizer operator of YM2612). This is based on the work Sauraen made reverse engineering the OPN. This is the first milestone. You can check an image of it on my twitter account here
I found some minor errors on Sauraen interpretation of the die picture and send them back to him. So I'm glad I could help debugging the OPN.
For the rest of the YM2612 there are no reverse engineered data so I will just replicate the chip functionality using my own code. Nonetheless, the OPN is critical for sound fidelity so I'm glad we have this part of the circuit exact.