Yamaha DX21 V1.5 OS EPROM.
Consists of 1 EPROM.
V1.05 Release Notes
Fixes numerous system bugs, voice allocation issues, file compatibility issues and user interface issues.
Improves patch import.
Improves MIDI Sysex compatibility.
Improves overall MIDI functionality.
Check OS EPROM version
Your current OS EPROM version is displayed when you boot up your Yamaha DX21 while holding the [BANK A1] and [BANK A2] buttons.
This EPROM is only compatible with the following Yamaha synthesizer:
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