Yamaha YRM55 (501)

FM music composer II

Yamaha YRM5 YRM501 MSX cartridge

1986 (May)
Initially sold for ¥9,800

Updated version of the Yamaha YRM101 Music Composer cartridge, with some different commands, added ability to insert and modify notes with a mouse and disk support.

Likely a YRM501 on a YIS604 with a Yamaha DX7
Likely a YRM501 on a YIS604 with a Yamaha DX7