via this auction
"5.25 floppy has been replaced with an hxc floppy drive emulator. This is an original emulator ii that has been upgraded to a plus model as indicated by the several roms on the inside. The plus model was capable of splits and had more memory than the original eii. I will include a cdrom disc that has some hxc software and readme files on it. The software is also backed up on the 2gb sd card that is included. The card has blank disk images that will boot the emu and can be saved onto. These can be created from scratch on most computers with the available software. This item does work. When the drive was replaced the wiring harnesses were worked on a little bit and the power supply was adjusted. It runs pretty well now. The buttons were a little sluggish at first, but have largely come back after being used for a little while. This is common on electronics that have sat for a long time. The more it is used the better they will get. All buttons respond double trigger or don't trigger on the first time occasionally. The sliders are in good shape and feel pretty smooth. The caps on the slide pots are reproductions. I'm including the emu dust cover in the last picture. The fit is pretty good, not perfect. It's a fairly good fit for such an odd shape keyboard..."
