KryoFlux is a USB-based floppy controller designed specifically for reliability, precision, and getting low-level reads suitable for software preservation. It’s here, it’s there and it’s working – today. This is the original developed by The Software Preservation Society.


  • Compatible with USB 2.0 (high-speed).
  • Powered by USB interface (approx. 500mA). Drive requires its own power (typical floppy drive power requirement at spin-up > 500mA).
  • Shugart (with extensions) drive interface. 34-pin dual-row header connector.
  • Works with all major 3.5″ and 5.25″ drives
  • Works well with selected 3″ (e.g. Amstrad FDI-1) drives.
  • Also works with 8″ (e.g. Shugart 851; might require additional adapter) drives; other types of drives and media currently under investigation.
  • Connection of two drives supported using a dual floppy cable, one can be accessed at a time.
  • Host software is currently Windows (XP and up, 32 and 64-bit flavours), Mac OS X and Linux.
  • Easy to use Graphical User Interface (including raw data visualisation):


  • Read at lowest level possible – precisely sampling the magnetic flux transition timing. Custom formats? Recording scheme violations? Encodings? KryoFlux reads them all!
  • Save as raw stream, or export to common sector formats supporting: Acorn Electron, Apple, Amstrad CPC, Archimedes, Atari 8-bit, Atari ST, BBC, Commodore 64, Commodore Amiga, MSX, IBM PC, PC-8801, Sam Coupe, Spectrum, E-MU Emulator & Emulator II, DEC RX01 & RX02 and many, many others.
  • Write back to disk. KryoFlux not only creates direct clones based on raw (STREAM) data dumped, but also supports fully verified “one-click” writing of ADF, G64 and IPF files, with more formats in development.
  • Need to duplicate an alien disk? With our patent-pending RepliFlux™ technology, KryoFlux will create bit-identical copies of almost any disk.
  • Load raw dumps instantly in the emulator of your choice, e.g., but not limited to: WinUAE, FS-UAE, E-UAE, WinSTon, Hatari, STEem, Caprice and Spectaculator.
  • Parallel export support. E.g. An Amiga/ST dual format disk can be written as raw stream, an ADF and an ST file, all at the same time during a single disk capture.
  • Intelligent software allows production of sector images for virtually all normal disks for systems containing a generic FM or MFM floppy controller. Many other weird synthesiser sample disk formats should work right out of the box.
  • Reading and writing is completely independent of real drive speed, also supports variable rate “zoned CAV” disks (e.g. Apple) in a normal fixed rate drive.
  • Software completely free for private, non-commercial use.
  • Easy to use graphical user interface.
  • RoHS compliant and WEEE registered.
  • High quality immersion gold coated boards, made to last a lifetime.
  • The de-facto standard for true disk imaging and preservation.

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