Recent content by trondl

I also struggle with writing decoded images back to a floppy. "cannot open input file". So: Issues with writing files via the browser, only the last file is detected, and the D-20 claims the file is incomplete. Cannot write images (.img). Is there a way to write the flux dumps back?

Thanks for chiming in! I believe you found your way to the "cutting edge" of D-20 floppy possibilities. As far as I know, HxC has no support for the D-20, only FluxEngine has support for the format and partially the filesystem. The big catch is the badly aligned drives in the D-20, resulting in...

I've now verified with the latest build that writing files with fluxengine is not working. Say I add two files, then commit, only the last added file is shown in the D20, and when loading I get an error code 9 which is basically saying the whole file hasn't been written.

The two files where deleted on the Roland. It could theoretically be a bug in the Roland sequencer firmware as it is currently running 1.00. 1.03 is the latest for my board revision (old) but it hasn’t been available on the interwebs yet (an eBay user is selling the eproms, but I’d rather reuse...

Found a very unfortunate bug: When writing files back to a floppy, the whole file is not written. It starts writing, then stops quickly and status is "finished". Also, files exported with special characters (underscore f.ex.) won't be accepted back when imported. If there is an easy way around...

Thought it'd be easier if you got the image.

Well, back again after a rather long wait for the drive belt to arrive via the far east. A certain eBay seller from Germany who is the only one selling the belt in Europe was not cooperative and reminded me of a certain Seinfeld episode regarding soup. To avoid any further monopoly I'll share...

The only empty formatted floppy I spared did of course have a bad sector. Will provide a clean image soon. In the mean time, I believe the data to be close to or in Roland MRC file format (.sng), as that is what was used with their MC-300 / MC-500 / MC-50 sequencers and later workstations (all...

Now, that’s a head scratcher! Amazing that you figured it out. Realy hope that bad sector in image 3 was not in use. I thought about dumping the empty formated floppy, but forgot it. Will do! Will also try to format the other way arround. Won’t be tomorrow but comming weeks should. Do you have...

I took the chance and rotated that stepper ever so slightly counterclockwise. There I immediately got perfect readings😍 All while following carefully on the oscilloscope to see realtime signal levels. Some floppies also needed realtime adjustments during the dump. The worst part is how easy it...

Thanks for having a look! What I was hoping for with treckr is filesystem imaging with an arduino. Flux level would be asking too much of it I believe. Sounds out of reach, or am I onto something?

I also still believe that an Arduino Mega and a fork of this project could easily handle the native D20 drive to dump a clean image, probably without flux, but still a clean image. Should also provide potentially an "easy" solution for other owners of a D20 to dump their floppies. Pinout and...

On second thought, I do have some old Apple 20pin 3.5" (Have easy access to an SE/30, more in external storage) floppy drives around, and it looks like they may be able to quarter step as they also use phase instead of /STEP /DIR Could potentially be one of the solutions.

I cannot for the life of me find any details on the adapter, how it's wired and other necessary details. My google-fu is fairly good, but I may have missed something. Do you have any details / links whatsoever? Seems like I may have to consider loosening those two stepper screws after all. Is...

Fantastic! If you see back at these post: https://forum.vcfed.org/index.php?threads/roland-d-20-decoding-the-mysterious-floppy-format.1243226/post-1319699 note some important corrections at post...