English Manual 

 
Support Forum 

  Why should I replace my floppy?  

 Remember that: 

• Floppy drives and floppy disks are world-wide out of production and, even if today you can still find goods in stock, these will run out 
• USB emulation allows data exchange between any machinery and computers without floppy drive 

  Why should I choose EMUFDD?  

 Remember that: 

• EMUFDD comes to you with all supported floppy interfaces within an unique firmware, jumper-free configurable 
• EMUFDD is the only emulator that loads/saves data directly from/to USB-key standard DOS directories (360KB/720KB/1.2MB/1.44MB) 
• EMUFDD also loads/saves data also in ISO standard format, readable by every virtual floppy software and floppy low level editor 
• EMUFDD can emulate system/boot floppies, particular floppies that can't be simply copied but need a clone operation 
• EMUFDD can emulate any non-standard floppy format (640KB/800KB/1.04MB/1.28MB/...) and density (FM/MFM) 
• EMUFDD spins at both 300rpm and 360rpm (japanese floppy drives) 
• EMUFDD + Virtual Floppy Drive (VFD) is a complete data exchange system, more than a plain floppy emulator 
• EMUFDD is an original product, designed & assembled in Italy since 2009 

 EMUFDD lets: 

• any computer and industrial machinery go on working, without hardware or software change 
• people just switch off, replace the old drive and turn on: complete stand-alone hardware emulation 
• people go on working, avoiding or deferring expensive machinery replacement 
• load data into the internal memory & plug the USB-key off : no need to keep the USB-key always plugged in 
• customers rely on a prompt and effective technical support - direct line with the designer 

  What can I do with EMUFDD?  

 Load/Save/Format data directly from/to USB-key standard DOS directories: 

1. Plug the USB-key in & go off-line : press SAVE or LOAD 
2. Select the directory number NN (X:\emufddNN.dir\*) : press DOWN (<<) or UP (>>) 
3. Load/Save/Format data from/to directory NN : press LOAD or SAVE or LOAD+SAVE 
4. Plug the USB-key off 

 Load/Save/Format data from/to USB-key standard ISO image files: 

1. Plug the USB-key in & go off-line : press SAVE or LOAD 
2. Select the image number NN (X:\emufddNN.img) : press DOWN (<<) or UP (>>) 
3. Load/Save/Format data from/to image file NN : press LOAD or SAVE or LOAD+SAVE 
4. Plug the USB-key off 

  Easy HW installation  

1. Connect power supply: 
   
   

   +12 V (not connected)

   Ground

   Ground

   +5V (main power supply)

   
   
2.  Connect 34-pin flat cable: 
   
   Be sure to match the  first conector pin - 1  with the  first flat cable pin - 1 
   Sometimes flat cables are inverted!
   Please check wether the cable is coloured/marked at pin-1 (standard) or pin-34 (inverted)
   
   

  Features  

 Internal memory: 

• 1.5MB of FRAM memory, fast & non-volatile 
• no need to keep the USB-key always plugged in 
• 0ms seek time (track access time)  

 User friendly: 

• 00-99 standard directories support & full USB-to-EMUFDD-memory translation 
• 00-99 standard ISO floppy images support & full VFD integration 
• bootable and OS/format independent raw images (FAT, custom, ...) 
• fast USB-key image load/save, stand-alone (no PC) image creation/FAT12-format 

 Configuration: 

• many interfaces inside an unique firmware (PC/AT, NC, hybrid) 
• fully configurable emulation (drive, size, interface, tracks, sectors...) 
• jumper-free configuration via "emufdd4.cfg" USB-key file, no need to stop/open/uninstall 

 Error resistance: 

• adaptive software PLL with time & signal correction 
• drive & signal glitches filtering 
• enhanced IN/OUT interface logic with up to 50mA signal support 

  Interfaces & Media  

 PC/AT-Intel 8072-IBM interface 

 NC-mPD765-Shugart interface 

 ...Custom... 

 2 

 Out 

 (PC) 
  Density Select  

 (NC) 
  Disk Change  

 (Custom) 
  Density Select  
  0 (GND)  
  1 (+5V)  
  Disk Change  
  Ready  

 4 

 - 

 - 

 6 

 - 

 - 

 8 

 Out 

 Index Hole 

 10 

 In 

 (PC) 
  MotorA  

 (NC) 
  Drive0  

 (Custom) 
  Pin10  

 12 

 In 

 (PC) 
  DriveB  

 (NC) 
  Drive1  

 (Custom) 
  Pin12  

 14 

 In 

 (PC) 
  DriveA  

 (NC) 
  Drive2  

 (Custom) 
  Pin14  

 16 

 In 

 (PC) 
  MotorB  

 (NC) 
  Motor  

 (Custom) 
  Pin16  

 18 

 In 

 Step Dir 

 20 

 In 

 Step Pulse 

 22 

 In 

 Write Data 

 24 

 In 

 Write Enable 

 26 

 Out 

 Track 0 

 28 

 Out 

 Write Protect 

 30 

 Out 

 Read Data 

 32 

 In 

 Head Select 

 34 

 Out 

 (PC) 
  Disk Change  

 (NC) 
  Ready  

 (Custom) 
  Density Select  
  0 (GND)  
  1 (+5V)  
  Disk Change  
  Ready  

 Density: 125÷250KHz FM / 250÷500KHz MFM / ...Custom... 

 Speed: 300rpm / 360rpm / ...Custom... 

 Format: 360KB / 720KB / 1.2M / 1.4M / ...Custom... 

 TEAC Floppy Drives 

 MITSUMI Floppy Drives 

 MITSUBISHI Floppy Drives 

PC demo - EMUFDD 2.0

NC & Keyboard demo - EMUFDD 2.0

  Simplified x86/x64 Virtual Floppy Drive (VFD) - base software  

  64bit WorkAround / Torrent / Pad / Screenshot / Icon  

  A virtual floppy drive that mounts image files (*.img) as new browseable computer resources.  

  Tested from WinXP (32bit) to Win7 (64bit). Open source & free.  

  Original Virtual Floppy Drive (VFD) - Home  

  Original Virtual Floppy Drive (VFD) - SW  

  Original Virtual Floppy Drive (VFD) - Source  

  Raw Write - optional software  

  A low level tool that lets you read and write floppies as image files (*.img). Open source & free.  

  Succesfully tested on standard-density DOS/non-DOS floppies: 720KB/1.44MB  

  Raw Write - Home  

  Raw Write - Source  

  OmniFlop - optional software  

  An ultra low level tool that lets you read and write floppies as image files (*.img). Free.  

  Succesfully tested on ANY-density DOS/non-DOS floppies: 640KB/720KB/800KB/1.2MB/1.44MB/...  

  Instructions: 

•  read the "User Guide.pdf" manual 
•  update the FDC driver with "OmniFDC.sys" 
•  update the floppy driver with "OmniFlop.sys" 

 

Using OmniFlop be sure to set "Slow Step Rate"



Select a format family (eg. DOS) or the full list "All"
Select the floppy density (eg. 80/2/16x256 ... 640KB)

• 80 tracks, 2 sides, 16 sectors each 256 bytes
• 80 * 2 * 16 * 256 = 640KB

  OmniFlop - Home  

  WinImage - optional software  

  A tool that lets you edit image files (*.img) without mounting them as virtual devices. Shareware.  

  WinImage - Home  

  Low Level Format (LLF) - optional software  

  Some USB keys may come with a non-standard format and EMUFDD will not recognize them.  

  This tool lets you blank erase an USB key so that you can format it again with a standard partition table. Free.  

  LLF - Home