after severals tries with the DIP-switch configuration i got the Rev. F work with my Yamaha PSR SQ16 (together with a 34pin-to-24pin PSR SQ16 adapter from ebay).
The DIP-Switches are set to ID1A/ID2B (ID2A/ID1B is NOT working!).
The configuration file is straight forward. I use 720kB DD images for my MIDI files.
The files are loading well, but it seems to be slow (maybe it just seems to be, i used a floppy last time many years ago...
).It is remarkeable that there seems to be heavy access to the floppy interface (the right led flickers very quick and neraly all the time), but not that much "real" disk access ("RA" flashes not very often and there are only one or two "clicks" from the little Speaker), but the files are loaded correctly.
Makes my neraly 25 years old Keyboard looking very modern...
.