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49 lines
1.9 KiB
Markdown
49 lines
1.9 KiB
Markdown
rolandd20
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====
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## 3.5" electronic synthesiser disks
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<!-- This file is automatically generated. Do not edit. -->
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The Roland D20 is a classic electronic synthesiser with a built-in floppy
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drive, used for saving MIDI sequences and samples.
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Weirdly, it seems to use precisely the same format as the Brother word
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processors: a thoroughly non-IBM-compatible custom GCR system.
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FluxEngine supports both reading and writing D20 disks, as well as basic support
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for the filesystem, allowing files to be read from and written to D20 disks.
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Note that the D20 was never intended to support arbitrary files on its disks and
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is very likely to crash if you put unexpected files on a disk. In addition,
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while the file format itself is currently unknown, there is a header at the top
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of the file containing what appears to be the name shown in the D20 file
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browser, so the name by which you see it is not necessarily the filename.
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A word of warning --- just like the Brother word processors, the D20 floppy
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drive isn't very well aligned. The drive itself uses quarter-stepping to
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automatically adapt to whatever alignment the disk was formatted with. This
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means that trying to read such a disk on a PC drive, which does _not_ have
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adjustable alignment, may not work very well. In these situations it is possible
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to adjust the alignment of most modern drives, but this is a somewhat risky
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process and may result in permanently wrecking the drive alignment.
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Please [get in touch](https://github.com/davidgiven/fluxengine/issues/new) if
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you know anything about it.
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Many thanks to trondl [on the VCF
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forums](https://forum.vcfed.org/index.php?threads/roland-d-20-decoding-the-mysterious-floppy-format.1243226/)
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for assistance with this!
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## Options
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(no options)
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## Examples
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To read:
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- `fluxengine read -c rolandd20 -s drive:0 -o rolandd20.img`
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To write:
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- `fluxengine write -c rolandd20 -d drive:0 -i rolandd20.img`
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