I have tried the whole day (09.02.2013) to make the "HxC Floppy Drive Emulator Rev. F" to work with the Yamaha RM1x, but (honestly) I failed! (in the first step)
I skip the opening of the case from the Yamaha RM1x, that's an easy step. I start after connecting data and power cable to the emulator.
So at first I used a 2GB SD card (Transcend). Formated before with FAT32 and copied the "QuickInstall_FloppyDiskImages" with the "SDHxCFE_PC_1.44MB" files (a lot of empty Floppy images and a default config file) to the SD card Then I started the RM1x go to the Disc menu and tried to save all data.
Unfortunately this did not worked and some strange errors happen, but in the end the Transcend 2GB was the initial problem (maybe faulty).
So I decided to contact the guys from lotharek (http://www.lotharek.pl/product.php?pid=42).
To put it anticipates they (especifically one technical supporter, Jeff, one of two Site Admin of this board) help me to get this emulator to work! [=> Thanks a lot to this premium support service on saturday evening!

Here is the chain of events:
After first contact I send a lot of information (like SD card manufacturer, type and size, Floppy Drive Model, ...) to the supporter.
The initially used Transcend SD 2BG seems to be not working properly, because of some strange errors.
Atfer choosing the Floppy image file, the image file was loaded (or mounted) and after 1 sec. unloaded?!?
The supporters guess was, that the Transcend card is faulty. So a new SD(HC) card was need to be used (here: I use a SanDisc Extreme Class 10 16BG card).
With this new card the image was loaded well and we tried some different jumper settings (up to all 4 jumpers "ON", but no it was not the last settings

Thereafter all jumpers were set to ON, this made that it worked 50%.
The virtual Floppy disc was recognized, but on save the RM1x raises a well known error (from the real old flobbies):
"Bad Disc! Format Now? [Yes/No]"
I continued experimeting with the settings of the emulator (Interface Type, Bitrate, Track Step, ...).
After reaching the "Track-Step"-Settings (Single or Double is chooseable), I switch from double to single.
This setting made the RM1x in the end to save all date to the virtual disc.
(After loading the before saved All-Data it work also)
Summary for the correct settings:
==========================
Jumper Settings:
only ID1A is "ON" (all the others are "OFF")
Interface Type:
IBM PC 1.44 (HD)
Bitrate:
500Kbit/s
Track Step:
Single
Hint:
1. use the Hxc Floppy Software to customize your config ==> https://hxc2001.com/floppy_drive_emulat ... r_soft.zip
2. use the pregenerated empty Floppy discs (IBM PC 1.44) ==> https://hxc2001.com/download/floppy_driv ... Images.zip
3. use a SDHC card (from my point of view)
Again, thanks a lot for this great support!
And for all other RM1x users, I can only say one thing:
Get this emulator and get rid of the old and faulty Floppy discs!
