Wonder MIDI

From Sega Retro


WonderMIDI MDTitleScreen.png

Wonder MIDI
System(s): Sega Mega Drive
Publisher: Victor
Genre: Miscellaneous

Number of players: 1
Release Date RRP Code
Sega Mega Drive
¥9,9009,900 RG-MD1

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Wonder MIDI (ワンダーMIDI) is an extremely rare Sega Mega Drive cartridge released by Victor in Japan. It was compatible with the RG-M1 variant of the Wondermega.

Having been undumped for over 30 years, a ROM was finally dumped by Andlabs and released on December 3, 2023.


The software allowed control of MIDI musical instruments via the original Wondermega's MIDI Out port. It was also compatible with "Hyper Audio System" compact discs, a format developed by NEC and Rittor Music for playback of MIDI music on compatible hardware branded "MiDiworld". A special MiDiworld disc was produced for Wonder MIDI called Wonder MIDI Collection. It also had a music visualiser, simply called "BGV".

Wonder Dog, the titular protagonist of the Mega-CD game Wonder Dog, is prominently featured on the box and in the software itself.

Magazine articles

Main article: Wonder MIDI/Magazine articles.


Photo gallery

Physical scans

Mega Drive, JP
Wonder midi cover.jpg

Technical information

Main article: Wonder MIDI/Technical information.


Wonder MIDI

WonderMIDI MDTitleScreen.png

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