Yamaha DX7IID/FD Firmware v. 1.9 Latest OS EPROM Update Upgrade DX7II

Yamaha DX-7IIID/FD firmware OS upgrade: Version 1.9

This is firmware update version 1.9 and is the latest know released operation system by Yamaha in 1988. This operation system update/upgrade requires one eprom chip.

Features/improvements:

The OS 1.9 update provides bug fixes related to midi communication, velocity, system code issues etc.

Note:

Fully verified before shipping and professionally packaged in anti-static material.

The IC socket is located at IC23