FAT12 Floppy Manager

Python PyQt GUI for managing FAT12 floppy disk images

A modern GUI tool designed for managing FAT12 formatted floppy disk images (.img) used in Yamaha keyboards like the DGX-500, PSR series, and Clavinova or other vintage keyboards. Currently verified to work with Yamaha DGX-500.

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Why this exists

Could not find a tool like this anywhere for vintage keyboards where I could just simply create an image formatted to FAT12, drag and drop files to it and copy the image to a usb drive. No longer need a tool like imdisk or winimage to create images, mount them in order to copy files to them and format them specifically on the Yamaha DGX-500. This tool ensures your virtual disks are compatible with GOTEK EFI (Extensible Firmware Interface) emulators and original hardware.

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Yamaha DGX-500 Specific Gotek FlashFloppy Configuration

If using Gotek Flashfloppy ensure there is FF.CFG file with the following contents:

display-type = oled-128x64-rotate
pin34 = nrdy

On the Gotek just need a jumper on S0 or S1. A second jumper is not needed. Verified to work on my Yamaha DGX-500 keyboard and Gotek SFR1M44-U100LQD 3.5inch USB 1.44M. The Gotek replaced the existing floppy drive.

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Quick Start

1 Check Python

Make sure Python is installed

• If not installed, install from python.org
• Install pip, Pyinstaller and PyQt6

2️ Build Application

Double-click: BUILD.bat

• Builds executable

3️ Run Your App

dist\FAT12 Floppy Manager.exe

• Copy to Desktop
• Double-click to run

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Features

General

• FAT12 Support - Standard FAT12 format verified to work with Yamaha DGX-500

File Management

• Create new blank floppy images - standard 1.44MB FAT12 floppy images
• Sector-Level Precision: Writes directly to the image file without needing to mount it as a drive
• Smart Truncation: Automatically converts long filenames (e.g., My_Favorite_Song.mid) to the hardware-compliant 8.3 format (MY_FAVOR.MID).
• Save floppy images - save copies of floppy images
• Add files - Drag any files or add file(s) with "Add Files" button
• Delete files - Press Delete, Backspace key or use "Delete Selected" button
• Extract files - Double-click or extract with "Extract Selected" button
• Sort columns - Click any column header
• Disk space - Real-time monitoring

Settings

• Confirmations - Toggle on/off for delete/replace
• Persistent - Settings saved between sessions
• Modern UI - Native OS styling with PyQt

Keyboard Shortcuts

• Delete/Backspace - Delete selected files
• Double-click - Extract file
• Ctrl+A - Select all
• Ctrl+O - Open different image

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What's Included

Essential Files:

• floppy_manager_pyqt.py - Main application (PyQt6)
• fat12_handler.py - FAT12 filesystem handler
• floppy_icon.ico - Application icon
• BUILD.bat - Build script

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System Requirements

For Building:

• Windows 10+
• Python 3.9+
• Internet connection
• 500 MB free space

For Running:

• Windows 10+

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Using the Application

Creating a Floppy Image

1. Run FAT12 Floppy Manager.exe
2. Select File / New Image...
3. Give it a filename and hit save

Opening a Floppy Image

1. Run FAT12 Floppy Manager.exe
2. Browse to your .img file
3. Start managing files.

Adding Files

• Click Add Files or drag and drop files
• Select any files
• Files automatically copied to floppy

Deleting Files

• Select files in table
• Press Delete or Backspace key
• Or click Delete Selected button

Extracting Files

• Double-click any file
• Or select and click Extract Selected
• Choose destination folder

Settings Menu

Turn off confirmations for faster workflow:

• Confirm before deleting checkbox
• Confirm before replacing checkbox

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Technical Details

Format: FAT12 filesystem
Capacity: 1.44 MB (1,474,560 bytes)
Max Files: 224 entries
Filenames: 8.3 format (auto-converted)

Compatible With:

• Yamaha DGX-500
• Other Yamaha or other vintage keyboards using FAT12 floppies
• Any FAT12 1.44 MB floppy images

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License

Copyright 2026 Stephen P Smith MIT License