-------------------------------------------------------------------------------
-----------H----H--X----X-----CCCCC-----22222----0000-----0000-----11----------
----------H----H----X-X-----C--------------2---0----0---0----0---1-1-----------
---------HHHHHH-----X------C----------22222---0----0---0----0-----1------------
--------H----H----X--X----C----------2-------0----0---0----0-----1-------------
-------H----H---X-----X---CCCCC-----22222----0000-----0000----11111------------
-------------------------------------------------------------------------------
-- Contact: hxc2001<at>hxc2001.com --------------------- https://hxc2001.com --
-------------------------------------------------------------------------------
HxC Floppy Emulator project
(c) 2006-2019 Jean-Franois DEL NERO / (c) HxC2001
Forum    : http://torlus.com/floppy/forum
Facebook : https://www.facebook.com/groups/hxc2001
Store    : https://hxc2001.com/store/
-------------------------------------------------------------------------------

Note : Online version with pictures available at this address :

http://torlus.com/floppy/forum/viewtopic.php?f=33&t=1683&p=16457

-------------------------------------------------------------------------------
- General STM32 HxC Floppy Emulator Firmware Usage                            -
-------------------------------------------------------------------------------

 -> Format the USB Stick in FAT32 (FAT12 & FAT16 also supported).

 -> (Optional if you have an LCD/OLED/OSD screen)
    Copy the right HXCSDFE.CFG file to the root of the USB Stick
    (See "Mode selection" below for more details).

 -> Copy or generate your disks images to the USB Stick.
    (See "File images supported" below for mode details).

 -> Insert the USB Stick into the emulator.

-------------------------------------------------------------------------------
- Mode selection                                                              -
-------------------------------------------------------------------------------

There are actually three main modes available :

---------------
- Normal mode -
---------------

In this mode the file image/disk to load is directly selected with the buttons
and the LCD/OLED screen or OSD overlay.
I2C screen or OSD overlay is needed to be able to use this mode.
An optional "select" push button can be connected on the JA connector.
No extra software needed.

config file is optional (Config-Less support).

If you you want to have the last image selection image feature, the config file is needed.
Copy the file HXCSDFE.CFG to the root of the flash media.
The HXCSDFE.CFG file to use can be found at Config_Files/Normal_mode/HXCSDFE.CFG into the following archive :
https://hxc2001.com/download/floppy_drive_emulator/HXCFEUSB_HFE_beta_firmware.zip

----------------
- Indexed mode -
----------------

In this mode the file images must be named DSKA0000.HFE/.IMG, DSKA0001.HFE/.IMG, DSKA0002.HFE/.IMG,...
(HFE & IMG images supported)
The 2/3 digits display shows the actual file number selected.

No LCD/OLED/OSD and/or extra push button is needed to use this mode.
No extra software needed.

This is the recommended mode when you don't have the extra LCD & button and when
your machine can't use the autoboot mode (see below).

The config file to copy to the root of the flash media for this mode :

Config_Files/Indexed_mode/HXCSDFE.CFG

-----------------------------------
- "Autoboot" / File selector mode -
-----------------------------------

In this mode, the AUTOBOOT.HFE software is used to select the images to load
directly on the computer.
This software is actually available on Amiga, Atari ST and CPC computers.

No LCD/OLED/OSD and/or extra push button is required to use this mode, but the LCD/OLED/OSD may help you
to see which disk is actually mounted.

The config and the software file to copy to the root of the flash media for this mode
are in the folder File_Selector/ and Config_Files/Autoboot_mode

-------------------------------------------------------------------------------
- Internal parameters settings                                                -
-------------------------------------------------------------------------------

There is many parameters that can be changed. You generally don't have to change
them as the default values are fine in most cases.

Anyway if needed, these settings can be changed with the internal menu.

To access the setting menu, remove the USB stick and press both buttons. Then you can navigate
through the various available options.

This menu is available with both LCD/OLED/OSD and 7 Segments Gotek drive.

The file selectors have also a setting page that can be used to change these
parameters.

--- OLED/LCD/OSD Gotek Menu ---

Here is some of the available parameters :

- User interface mode. (Normal/Indexed/File selector).

- Floppy Interface mode (predefined modes and custom modes).

- System Family selection.

- Single or Double step track mode.

- Emulation Bitrate (Auto or forced).

- Floppy write protect state.

- Step Sound output settings.

- LCD/OLED characters per line setting (16/18/20/21 or 40 characters per line).

- LCD Backlight/OSD timeout setting.

- Select Button emulation (on/off and timeout setting)

- Rotary type setup.

Note : To clear/reset all settings to the default values, press the right button at power up.


--- Original 7 Segments Gotek Menu ---

-> To access it, remove the USB Stick and press both buttons.
--> Choose the sub menu number - wait some seconds for the selection validation.
---> Check and/or change the setting - wait some seconds for the selection validation.

The new setting is then saved into the device.

    Current Menu and sub menu definition :

    Menu 0 - System family selection :

            00 = AUTO (DEFAULT)
            01 = Amiga
            02 = Acorn
            03 = Atari ST
            04 = IBM PC AT/XT
            05 = Camputer Lynx
            06 = Commodore 1581
            07 = Thomson
            08 = x68000
            09 = SAMCOUPE
            0A = MSX
            0B = Spectrum
            0C = Akai
            0D = Casio
            0E = Emax
            0F = Ensoniq
            10 = General Music
            11 = Korg
            12 = Ensoniq ASR10 (Ensoniq Auto DD & HD support)
            13 = Opus Discovery
            14 = TI99/4A
            15 = Robox RC9400
            16 = Kawai
            17 = Yamaha QX3
            18 = User defined

    Menu 1 - Interface mode :

            00 = AUTO (DEFAULT)
            01 = IBM PC DD
            02 = IBM PC HD
            03 = ATARI ST DD
            04 = ATARI ST HD
            05 = AMIGA DD
            06 = AMIGA HD
            07 = CPC DD
            08 = GENERIC SHUGART DD
            09 = IBMPC ED
            0A = MSX2 DD
            0B = C64 DD
            0C = EMU SHUGART
            0D = S950 DD
            0E = S950 HD
            0F = S900/S950 (Density Auto)
            10 = PC DD/HD  (Density Auto)

    Menu 2 - Write protect mode :

            00 = AUTO (DEFAULT)
            01 = Write protected.
            02 = Write enabled.

    Menu 3 - Double Step :

            00 = AUTO (DEFAULT)
            01 = Single step
            02 = Double step

    Menu 4 - User interface mode :

            00 = AUTO (DEFAULT/From Config file)
            01 = Normal mode
            02 = Indexed mode
            03 = Autoboot/selector mode

    Menu 5 - Auto select delay :

            01-08 : Delay (number of seconds).

    Menu 6 - Head settling delay :

            00-30 : Delay (number of milli-seconds).

    Menu 7 - Rotary type :

            00 = 1 increment per step rotary.
            01 = 2 increment per step rotary.
            02 = Disable.

    Menus 8<->E : Not currently assigned.

    Menu F - Display firmware version

    Note : To clear/reset all settings to the default values, press the right button at power up.

-------------------------------------------------------------------------------
- USB Stick folder mount support                                              -
-------------------------------------------------------------------------------

(Fimware v3.2.1.1a or above required)

USB stick folder mount to a FAT/DOS compatible virtual floppy feature :

This feature allows you to directly put your files in a stick's folder and mount this folder as a FAT/DOS floppy disk !

You can use it with any machine compatible with the FAT file system (PC, Atari ST, lots of keyboards/samplers and CNC machines...).

To use this feature, copy an empty/preformatted DOS IMG image to the stick path "/mount/emptyfat.img"
This image can be a 720KB or 1.44MB blank DOS image or any other FAT compatible blank image.
You can use the HxC Floppy Emulator software Disk Browser to create it or take the ones present in the firmware archive.

Once you select a "mount source" folder on the emulator, the emptyfat.img file is duplicated to a "MOUNTED.IMG" file.
Then all files/subfolders present into the selected folder are added into this duplicated image.
(Note : the emptyfat.img remains untouched).

Your "mount sources" / root folders should have the extension ".mnt" to be mounted by the emulator :
example : "myvirtualdisk.mnt"

This new feature can be used with the "normal"/direct browsing (oled/lcd screen usage) and indexed modes.
For the indexed mode just put the DSKAXXXX prefix in the mount point folder name.
example : "DSKA0000_MyMidiFiles.mnt"

Please note that the image duplication and files copy operations can take some seconds.
I will try to optimize/speedup the mount operations in the next releases.

-------------------------------------------------------------------------------
- File images supported                                                       -
-------------------------------------------------------------------------------

Direct support :


- Universal support :
  All machines are supported by the (H)xC (F)loppy (E)mulator (HFE) file format :
  *.HFE ( Read / Write )
  *.HFE (v3 - Copy protected images/"ipf" support) ( Read )

- Amiga :
 *.ADF ( Read / Write )

- Atari ST:
 *.ST  ( Read / Write )

- PC and compatibles (Computers, Synth and tools...)
 *.IMG ( Read / Write ), *.IMA ( Read / Write )

- Microbee :
 *.DSK ( Read / Write )

- MSX :
 *.DSK ( Read / Write ), *.IMG ( Read / Write )

- Amstrad CPC/Spectrum/Tatung Einstein :
 *.DSK (CPC/ZX Spectrum Normal & Extended DSK) ( Read / Write )

- Acorn :
 *.ADL,*.ADM,*.SSD,*.DSD and *.ADF files support  (all Read / Write )

- Camputer Lynx :
 *.LDF ( Read / Write )

- Commodore C64 :
 *.D81 ( Read / Write )

- Thomson machines :
 *.FD ( Read / Write )

- TI99/4A
*.DSK ( Read / Write ), *.V9T9 ( Read / Write )

- Sam Coup :
 *.SAD ( Read / Write ), *.MGT ( Read / Write )

- Spectrum :
 *.TRD, *.SDD, *.DSK (all Read / Write )
 *.OPD (Opus Discovery)

- Akai (S900 / S950 / S01 / S20 / MPC...):
  *.IMG, *.AKAI (DD & HD) (all Read / Write )

- Casio :
  *.FZ1 (Read / Write )

- Emax :
 *.IMG (Read / Write )

- Ensoniq :
 *.IMG (Read / Write )

- General Music :
 *.IMG (Read / Write )

- Korg :
 *.IMG ( Read / Write )

- Roland :
 *.OUT ( Read / Write )

- Robox RC9400 :
 *.IMG ( Read / Write ), *.DSK ( Read / Write )

- Kawai :
 *.IMG ( Read / Write ), *.DSK ( Read / Write )

- Yamaha QX3 :
 *.IMG ( Read / Write )

- User defined raw format : See the custom firmware build page -> https://hxc2001.com/custom_fw/

The HFE files can be generated from a large kind of files images with this software :

https://hxc2001.com/download/floppy_drive_emulator/HxCFloppyEmulator_soft_beta.zip


Indirect image support (With the HFE support) :

KRYOFLUXSTREAM      :  KryoFlux Stream Loader                (*.raw)
AMIGA_DMS           :  AMIGA DMS Loader                      (*.dms)
AMIGA_ADZ           :  AMIGA ADZ Loader                      (*.adz)
AMIGA_EXTADF        :  AMIGA EXTENDED ADF Loader             (*.adf)
AMIGA_OLDEXTADF     :  AMIGA OLD EXTENDED ADF Loader         (*.adf)
ZXSPECTRUM_FDI      :  ZX SPECTRUM FDI Loader                (*.fdi)
AMIGA_ADF           :  AMIGA ADF Loader                      (*.adf)
ACORN_ADF           :  ACORN ADF Loader                      (*.adf)
AMSTRADCPC_DSK      :  Amstrad CPC DSK Loader                (*.dsk)
ATARIST_DIM         :  ATARI ST DIM Loader                   (*.dim)
ATARIST_STX         :  Atari ST STX/Pasti Loader             (*.stx)
ATARIST_STT         :  ATARI ST STT Loader                   (*.stt)
COPYQM              :  COPYQM IMG Loader                     (*.dsk)
TELEDISK_TD0        :  TELEDISK TD0 Loader                   (*.td0)
ATARIST_MSA         :  ATARI ST MSA Loader                   (*.msa)
ATARIST_STW         :  STW Loader                            (*.stw)
RAW_IMZ             :  IBM PC IMZ Loader                     (*.imz)
HXCMFM_IMG          :  HXC MFM IMG Loader                    (*.mfm)
ORIC_DSK            :  ORIC DSK Loader                       (*.dsk)
ATARIST_ST          :  ATARI ST ST Loader                    (*.st)
ROLAND_W30          :  Roland W30 file Loader                (*.w30)
SPS_IPF             :  SPS IPF Loader                        (*.ipf)
TI994A_V9T9         :  TI99 4A V9T9 Loader                   (*.v9t9)
AMIGA_FS            :  AMIGA FS Loader                       (*.amigados)
PROPHET2000         :  PROPHET 2000 Loader                   (*.img)
RAW_IMG             :  IBM PC IMG Loader                     (*.img)
FLP_IMG             :  FLP PC Magazine image Loader          (*.flp)
MSX_DSK             :  MSX DSK Loader                        (*.dsk)
FAT12FLOPPY         :  FAT12/MS DOS Loader                   (*.fat)
HXC_HFE             :  SD Card HxCFE HFE file Loader         (*.hfe)
VTR_IMG             :  VTR IMG Loader                        (*.vtr)
IMD_IMG             :  ImageDisk IMD file Loader             (*.imd)
HXC_AFI             :  HxC AFI file loader                   (*.afi)
C64_D81             :  C64 D81 Loader                        (*.d81)
ZXSPECTRUM_TRD      :  Zx Spectrum TRD Loader                (*.trd)
ZXSPECTRUM_SCL      :  ZX SPECTRUM SCL Loader                (*.scl)
THOMSONTO8D_SAP     :  THOMSON TO8D SAP Loader               (*.sap)
TRS80_JV1           :  TRS80 JV1 Loader                      (*.jv1)
TRS80_JV3           :  TRS80 JV3 Loader                      (*.jv3)
TRS80_JVC           :  TRS80 JVC Loader                      (*.jvc)
SVD                 :  SVD Loader                            (*.svd)
NEC_D88             :  NEC D88 Loader                        (*.d88)
X68000_HDM          :  X68000 HDM file Loader                (*.hdm)
RAW_LOADER          :  RAW Sector loader                     (*.img)
SNES_SMC            :  Super famicom SMC Loader              (*.smc)
VEGAS6809           :  VEGAS6809 image Loader                (*.veg)
TRS80_DMK           :  TRS80 DMK Loader                      (*.dmk)
TI994A_PC99         :  TI99 4A PC99 Loader                   (*.pc99)
APRIDISK            :  APRIDISK Loader                       (*.dsk)
ENSONIQ_EDE         :  ENSONIQ EDE Loader                    (*.ede)
FAT12FLOPPY         :  FAT12/MS DOS Loader                   (*.fat)
ENSONIQ_GKH         :  ENSONIQ GKH Loader                    (*.gkh)
THOMSON_FD          :  THOMSON FD Loader                     (*.fd)
CASIO_FZF           :  Casio FZF file Loader                 (*.fzf)
DRAGON3264_VDK      :  DRAGON32 & 64 VDK Loader              (*.vdk)
OBERHEIM_DPX        :  Oberheim DPX Loader                   (*.dpx)
ENSONIQ_EDM         :  Ensoniq mirage EDM Loader             (*.edm)
EMAX_EM             :  EMAX EM1 & EM2 Loader                 (*.em1)
SAMCOUPE_MGT        :  SAM COUPE MGT Loader                  (*.mgt)
SAMCOUPE_SAD        :  SAM COUPE SAD Loader                  (*.sad)
EMULATORII          :  E-mu Emulator II / SP1200 dsk Loader  (*.emuiifd)
EMULATORII_EMUII    :  E-mu Emulator II *.eii Loader         (*.eii)
EMULATORI           :  E-mu Emulator I dsk Loader            (*.emufd)
CAMPUTERSLYNX       :  CAMPUTERSLYNX Loader                  (*.ldf)
BBC_ADL             :  BBC ADL floppy image loader           (*.adl)
BBC_SSD_DSD         :  BBC SSD & DSD floppy image loader     (*.dsd)
FEI                 :  FEI Loader                            (*.fei)
SYSTEM_24           :  System 24 loader                      (*.s24)
SCP_FLUX_STREAM     :  SCP Stream Loader                     (*.scp)
APPLE2_NIB          :  Apple II NIB Loader                   (*.nib)
APPLE2_DO           :  Apple II DO Loader                    (*.do)
SPECCYDOS_SDD       :  Speccy DOS SDD File Loader            (*.sdd)
ARBURG              :  ARBURG RAW Loader                     (*.arburgfd)
GENERIC_XML         :  Generic XML file Loader               (*.xml)

(Note : the actual STM32 firmware wasn't yet tested with the above mentionned machines !)

Software step by step guide :
https://hxc2001.com/download/floppy_drive_emulator/HxC_Floppy_Emulator_Software_User_Manual_ENG.pdf

-------------------------------------------------------------------------------
- Optional Add-on hardware                                                    -
-------------------------------------------------------------------------------

-----------------------------------------------
- I2C SSD1306 128x32 / 128x64 OLED LCD Screen -
-----------------------------------------------
Note : Since the 3.0.26.1a

  You can connect an SSD1306 / SH1106 based 128x32 OLED screen.

  These screens are compatible with this firmware : http://www.ebay.com/itm/302110929185  ( IIC Interface ! )

  You can connect the screen directly to the J7 connector. (additional pull-up resistors NOT required.)

 - GND, VCC 3.3V, SCL and SDA position on J7 :

                           _____|
                          |     |
                          | USB |
                          |_____|
        OO______________________|
    SDA OO|SCL
    GND OO|VCC3V3
        J7|
          |
__________|

! > Take care with the 3.3V and GND while connecting the screen. Any mistake may damage the screen ! < !


-----------------------
- I2C 2x16 LCD Screen -
-----------------------

 These kind of I2C LCD boards are compatible with the firmware :

 http://www.ebay.com/itm/IIC-I2C-TWI-SP-I-Serial-Interface-Board-Module-Port-For-Arduino-1602LCD-Display-/310565362720?pt=LH_DefaultDomain_0&hash=item484f235c20
 (board only - without the LCD)

 http://www.ebay.com/itm/IIC-I2C-TWI-SPI-Serial-Interface-Board-Module-Port-for-Arduino-1602LCD-Display-/161245616356?pt=LH_DefaultDomain_0&hash=item258afcd8e4
 (board only - without the LCD)

 http://www.ebay.com/itm/New-Blue-IIC-I2C-TWI-1602-16x2-Serial-LCD-Module-Display-for-Arduino-/221439853893?pt=LH_DefaultDomain_0&hash=item338ed80545
 (board + LCD)

 http://www.ebay.com/itm/IIC-I2C-TWI-SP-I-Serial-Interface1602-16X2-Character-LCD-Module-Display-Yellow-/310565065933?pt=LH_DefaultDomain_0&hash=item484f1ed4cd
 (board + LCD)

 Any I2C address is supported : The firmware scan automatically the I2C bus at power up (0x20-0x27 and 0x38-0x3F address range scanned)
 So there is no specific requirement about the I2C address setting.

 To connect the I2C LCD, you have to connect SDA & SCL at the J7 connector (see below).
 Please note that 2 additionnals 4.7Kohms pull up resistors (+5V) are needed on SCL & SDA.
 the +5V and GND wire can be connected on the programming connector (see below) :

 If you want to build the I2C board yourself, here is the schematic:
 https://hxc2001.com/download/floppy_drive_emulator/Ext_Slim_HxC_Floppy_Emulator_I2C_LCD_Schematic.pdf

- Possible +5V source on the PCB (on the programming connector):

 _____________________________
 |
-+--- NC
-+--- GND      O J3 (BOOT0)
-+--- GND      O VCC3V3
-+--- +5V     OO TX
 |        +5V OO RX
 |        GND OO RST
 |--
 |  |
 |  |


 - SCL & SDA position on J7 :

                           _____|
                          |     |
                          | USB |
                          |_____|
        OO______________________|
    SDA OO|SCL
    GND OO|VCC3V3
        J7|
          |
__________|


-----------------------
- Extra select button -
-----------------------

The optional select/middle button, usable with the "normal" mode
can be added on the JA jumper position.
JA is present near the floppy connector.

-----------------------
- Buzzer sound output -
-----------------------

You can connect a piezo or a magnetic buzzer to the JB jumper position.
A transistor is needed for the magnetic version.
The sound output can be disabled or enabled into the selector settings.
(Note : Please remove these old sound mod using directly the floppy step signal, they are producing reliability problems...)

----------
- Rotary -
----------

You can connect an extra Rotary encoder.


                           _____|
                          |     |
                          | USB |
                          |_____|
    Dir OO Ck___________________|
    SDA OO|SCL
    GND OO|VCC3V3
        J7|
          |
__________|

Connection points :

     Clock (Ck) -> J7 pin 2.
     Direction (Dir) -> J7 pin 1.
     GND/VSS -> J7 pin 5
     VCC -> J7 pin 6 (Only needed if your rotary have pull-up resistors)

-----------------------------------
- On screen display (OSD) overlay -
-----------------------------------

You can select images and see the drive status on the machine's screen without
any additional software or LCD/OLED.

You only need 2 wires and a resistor to connect the Gotek to the machine's video signals :
One wire is used for the CSYNC video signal (Composite Sync), the other wire for the red, green (prefered)
or blue signal.

One resistor must be put in serie on the color signal between the Gotek and the machine.
You can use a value between 220 and 470 ohms for this resistor. A potentiometer can be also
used to tune the OSD brightness/contrast.

This was currently tested on Amiga 500, Atari STE and Amstrad CPC 6128 machines, but should work
with any machines having a composite sync signal.

Note : If the standby/hide delay is too long or too short for you, you can change the screen standby timeout
value in the embedded menu "screen standby" setting.

HxC Firmware for Gotek OSD wiring :

Gotek wiring :

OSD Video out : Gotek U8 Pin 5 (PB15)
OSD Video CSYNC in : Gotek "JTCK-SWCLK" pin (PA14)

Picture : HxCGotek_OSD_Mod.jpg

Amiga 500 :

OSD Video out : Gotek U8 Pin 5 (PB15) -> 220 / 470 ohms resistor (or a 1k ohms potentiometer) -> Amiga 500 Ferrite bead E432 (see picture).
OSD Video CSYNC in :  Amiga 500 U41 Pin 8 -> Gotek "JTCK-SWCLK" pin (PA14) (near the serial tx programming pin, please see HxCGotek_OSD_Mod.jpg picture).

Picture : HxCGotek_Amiga500_OSD_Mod.jpg

Amstrad CPC6128 :

OSD Video out : Gotek U8 Pin 5 (PB15) -> 220 / 470 ohms resistor (or a 1k ohms potentiometer) -> CPC6128 R128 (see picture).
OSD Video CSYNC in :  CPC6128 IC116 Pin 5 -> Gotek "JTCK-SWCLK" pin (PA14) (near the serial tx programming pin, please see HxCGotek_OSD_Mod.jpg picture).

Picture : HxCGotek_AmstradCPC6128_OSD_Mod.jpg

Atari STE :

OSD Video out : Gotek U8 Pin 5 (PB15) -> 220 / 470 ohms resistor (or a 1k ohms potentiometer) -> Atari STE R420 (see picture).
OSD Video CSYNC in :  Atari STE R475 -> Gotek "JTCK-SWCLK" pin (PA14) (near the serial tx programming pin, please see HxCGotek_OSD_Mod.jpg picture).

Picture : HxCGotek_AtariSTE_OSD_Mod.jpg

-----------------------
- QuickDisk Emulation -
-----------------------

(work in progress!)

The HxC Firmware for Gotek have a QuickDisk emulation mode. 

To use it, update the Gotek with the firmware present in the /QuickDisk forlder in the firmware archive.

The Gotek floppy port to the QuickDisk interface is :
-- Shugart pin --          -- QuickDisk Machine--

Pin  2 (/DC)           ->  /MS (/MediaSense)
Pin 10 (/DS0)          ->  Connect it to GND/VSS
Pin 16 (/MotorOn)      ->  /MO
Pin 20 (/Step)         ->  /RS (/Reset)
Pin 22 (/WriteData)    ->  /WD (/WriteData)
Pin 24 (/WriteGate)    ->   WG (WriteGate)
Pin 28 (/WriteProtect) ->   WP (WriteProtect)
Pin 30 (/ReadData)     ->   RD (ReadData)
Pin 34 (/Ready)        ->  /RY (/Ready)		

Pins 4,6,8,12,14,18,26 and 32 can be left unconnected on the Gotek.
Odd pins Gotek pins (1,3,5,7,...,33) should be connected to the GND/VSS.

A Blank QuickDisk floppy disk can be found in the firmware archive in the folder /QuickDisk

(c)2006-2019 Jean-Franois DEL NERO
(c)2006-2019 HxC2001

https://hxc2001.com
http://hxc2001.free.fr/floppy_drive_emulator/index.html
