SMSFM - FM sound expansion for Sega Master System
The FM expansion from the famous Tim Worthington for your Sega Master System.
The Japanese Sega Master System included a Yamaha YM2413 FM synthesis chip along with the standard PSG sound. Many games, some of which were never even released in Japan, contain extra FM sound and music. Installing this board will add FM sound capability to any Master System or Mark III game console. The first post in this thread contains a list of games with FM sound. A switch is provided with the board to disable the FM chip and revert to the PSG sound whenever desired.