Greaseweazle allows versatile floppy drive control over USB. By extracting the raw flux transitions from a drive, any (eg. copy-protected) disk format can be captured and analyzed - PC, Amiga, Amstrad, PDP-11, musical instruments, industrial equipment, and more. The Greaseweazle also supports writing to floppy disks, from a range of image file formats including those commonly used for online preservation (ADF, IPF, DSK, IMG, HFE, etc).

Greaseweazle V4.1 is the very latest version, updating the V4 design with new features:

• Reads and writes 3", 3.5", 5.25", 8" disks (with suitable drive and cable)
• Buffered outputs, for communicating with older 5.25" and 8" disk drives
• Integrated power connector for directly powering most 3.5" disk drives
• Write-enable jumper can be removed for safer preservation of precious vintage disks
• Supports flippy-modded 5.25" drives
• Supports Disk-Change detection as used by Rob Smith's integration into the WinUAE Amiga emulator
• 3 user-definable outputs (eg. 8" interface REDWC signal)
• 100% factory tested, and tested again by me before shipping

More information and documentation wiki: https://github.com/keirf/Greaseweazle/wiki/V4.1-Setup

Device comes flashed with the latest firmware (v1.6 right now) from: https://github.com/keirf/greaseweazle-firmware/releases/latest

(If you want a different version let me know!)

This listing is for the Greaseweazle V4.1 device only. Professionally assembled and ready to go (no manual soldering). You will additionally require:

• A disk drive (for example a PC 3.5" or 5.25" drive)
• A floppy ribbon cable (typically you want a standard PC cable with 'twist' on pins 10-16, to communicate with a PC floppy drive)
• Floppy drive power cable, or power supply
• (Optional) 3D printed case (many designs available for free)

Recommended host OS: Windows 10/11, Ubuntu Linux, macOS (recent versions). Most up-to-date versions of Linux distributions should also work (but less tested).

See how I rip the original copy-protected IBM PC Lemmings disk with this board: https://youtu.be/gEbWJWzWHfc

Greaseweazle Firmware 1.6 (Latest) Release Notes:

• Flux write: Whole-track writes to hard-sectored disks
• Pre- and post-write delays: Specified by many drive datasheets
• Required for correct interaction with offset tunnel-erase heads
• Configurable "Index Mask", for debouncing noisy INDEX signals
• Seek (HDD): Remove arbitrary 100-cylinder limit