The YM2413 (aka OPLL) is typically associated with the Master System/Mark III as it is the chip that generates the FM audio found in over 60 games. As for the Famicom, a derivative of the YM2413 was used in Konami’s last MMC (aka mapper), the VRC7. Only 2 games were ever released that had the VRC7 on board and one of them took advantage of the expansion audio capabilities of the YM2413: the cult classic RPG Lagrange Point.
Necronomfive was responsible for the back-then groundbreaking YM2413 core that got implemented into the MegaEverdrive X7 a few years ago. This time around his Famicom version of the core received an update that focuses on improving the overall accuracy of the 4-bit instruments found on all of the 6 used FM synth channels.
The regular N8 also received minor bug fixes for the MMC3 mapper.
- N8 firmware 1.25: http://krikzz.com/pub/support/everdrive-n8/original-series/OS/nesos-v1.25.zip
- N8 Pro firmware 2.11: http://krikzz.com/pub/support/everdrive-n8/pro-series/OS/EDN8-V2.11.zip
- More info about the YM2413: https://www.smspower.org/Development/YM2413
- Lagrange Point English translation: http://agtp.romhack.net/project.php?id=lagrange