via this auction
"Extremely rare 1989 Cannon Research Frontal Lobe expander for the Korg M1/M1r synthesizer. :::
MADE IN U.S.A.
This unit is in great working condition/fully tested, and near mint cosmetic condition. All buttons/ led's/ lcd/ backlight/ 3.5"floppy drive/etc. are all working as they should. The Frontal Lobe expands the M1's sequencer as well as allowing for 3.5" disk storage of Seq./Prog./Combi. The RJ45 <> MIDI connection cable and 12VAC power adapter are not included. A nice opportunity to grab a rare M1 accessory/highly collectible."
