I built a SDCard HxC Floppy Emulator from your kit and installed it in my Yamaha SY99 synthesizer. I have a 34 pin to 26 pin converter that I verified works with a floppy drive before I hooked up the HxC emulator.
Using my PC, I put my files into the HFE floppy image files and then copied the HFE files to the SD card. Of course I have a HXCSDFE.CFG on the SD card too. And then I put the SD card in the SDHxC emulator in the synth it works and I can read and load all my files.
My problem is that when I try to write a file back out to the HFE file using the synth. The file write reports successful on the synth and the file shows up in the synth file system, but then when I dismount and remount the HFE image the file I wrote is gone!
The SD card is not write protected and I have tried using a regular 2GB SD card and a 8GB SDHC card, and get the same results.
Have you seen anything like this? Thanks in advance for your help.
From which kit exactly ? WHich software version are you using ?
Do you see "WR" on the LCD when the synth write to the floppy ?