DFS Explorer


Disc Transfer



DFS Explorer is a program which allows you load disc images, view files and copy files to and from your PC's hard disc or other running copies of DFS or ADFS Explorer. If you don't already know, DFS was one of the disc filing systems used by the BBC and Master 128 range of computers.

Disc images are used by most BBC/Acorn emulator programs such as the excellent BeebEm. Rather than use the original physical floppy disc with the emulators,  a track by track disc image is made and used instead.

If you still have access to a BBC Computer and a suitable serial lead, you can create a disc image of your old DFS discs using the disc transfer facilities built into DFS Explorer. Instructions for making up a serial cable are included in the download package below.

Alternatively, there are plenty of ready made disc images of popular programs widely available for download from the internet. Places to try are :

The program will allow you to load or create a new DFS disc images in any of the following formats :

  •  40T single sided - ssd or img (100K)
  •  80T single sided - ssd or img (200K)
  •  80T double sided - dsd (400K)
  •  40T single sided - ssd or img (100K)  - Watford DFS 62 File Format
  •  80T single sided - ssd or img (200K)  - Watford DFS 62 File Format
  •  80T double sided - dsd (400K)  - Watford DFS 62 File Format

After loading a disc image, you will see a screen similar to the one below :


If the disc image is only single sided, you will only see a single disc view window.

The screen shows the contents of the disc images. You can select files and show their contents in either text, Wordwise, hex or de-tokenised BASIC format (with further options to save or print the displayed file). You can also generate directory listing in *CAT or *EX formats.

You can drag and drop individual files or groups of files to and from your PC or other running copies of the ADFS or DFS Explorer programs.

Other options are available for deleting, renaming, locking and unlocking files as well as setting disc boot options and disc titles. Options can be selected off the main menu or a context sensitive menu will appear if you right-click a file name in either window.

Please ensure you have backup copies of your disc images before attempting to modify them.

You can download the latest version of the program below :

Since releasing 2.0.0, a slight bug has been found in the DFSXFER.BAS program. You can download an updated version below :

To help cover costs, I have decided to make DFS Explorer shareware at a cost of only 5.00.

Instead of paying the shareware fee, would you please consider making a small donation instead to my wife's Just Giving page. She was recently diagnosed with breast cancer and is trying to raise money to help a charity which is providing her with lots of help and support throughout her journey. Just email me your Computer ID, Registration Name and which program you wish to register and I will send a key back. Thanks, Jon & Tracy

Alternatively, if you wish to register the program, please enter the Computer ID and Registration Name below and click the Buy Now button.

Your personalised Computer ID can be found on the Register menu option inside DFS Explorer.

Your registration key will be returned as soon as I can process the request, usually within 24 hours and normally by return if I am at the computer. If you do not receive your key after 24 hours, please check your spam folder or get back to me.

PLEASE NOTE : The Computer ID is valid for one computer only so you will not be able to install the program onto multiple computers without purchasing additional registration keys.

Once registered, all future updates of DFS Explorer will be free of charge.

If you decide not to register the program, you will not be able to save any disc images you create but all other features will be fully active.

Computer ID
Registration Name
Unfortunately, there is a problem again with Paypal in that they no longer send me the Computer ID and Registration Name as part of the order confirmation. Could you please email them to me separately at jon@g7jjf.com so I can  process the order. Thanks

If you are unwilling to use PayPal to register the program, please contact me for alternative payment methods.

Revision History
Date Version Changes
20/07/12 2.2.0 Added View As Mode x picture with palette change options
15/07/10 2.1.0 Added option to split a directory of dsd images into separate ssd images
Added View As Teletext page option
with options to print or save page as BMP file
Added support for non-interleaved discs
29/09/07 2.0.0 Made program shareware
Added * Command option to XFER Menu
Automatically load disc image after successful XFER (via option)
Play WAV file after successful XFER transfer (via option)
Remember size and position of trace,view,CLI and receive windows
21/07/07 1.3.2 Added WordWise file viewer
Added Copy/Select All to clipboard from File View menu
(to allow easy transfer of single program listings to BeebEm)
30/06/07 1.3.1 Made the program Vista compatible
You may need to turn on User Account Control to install it properly
16/04/06 1.3.0 Added option for sending and receiving disc images from a real BBC
Added F2, F5, Del and Ctrl-A keyboard shortcuts
Can now edit load/exec addresses of a file
Asks to save changes when quit/load/new disc image
18/03/06 1.2.1 Fixed error when importing or exporting zero length files
29/10/05 1.2.0 Added support for Watford DFS 62 file format discs
01/06/05 1.1.1 Added Compact Disc option
24/05/05 1.1.0 Added Disassemble File option
Added Find option to View File window
23/05/05 1.0.1 Minor fix to detect invalid filenames
21/05/05 1.0.0 Initial Release

Date Downloads
Nov 2010 20
Oct 2010 21
Sep 2010 25
Aug 2010 31
Jul 2010 26
Jun 2010 21
May 2010 23
Apr 2010 14
Mar 2010 27
Feb 2010 14
Jan 2010 21
Dec 2009 16
Nov 2009 22
Oct 2009 17
Sep 2009 8
Sep 2009 8
Aug 2009 19
Jul 2009 14
Jun 2009 10
May 2009 8
Apr 2009 19
Mar 2009 24
Feb 2009 22
Jan 2009 18
Dec 2008 14
Nov 2008 11
Oct 2008 17
Sep 2008 17
Aug 2008 22
Jul 2008 20
Jun 2008 16
May 2008 14
Apr 2008 12
Mar 2008 14
Feb 2008 16
Jan 2008 15
Dec 2007 22
Nov 2007 32
Oct 2007 31
Sep 2007 43
Aug 2007 35
Jul 2007 49
Jun 2007 17
May 2007 20
Apr 2007 23
Mar 2007 23
Feb 2007 7
Jan 2007 24
Dec 2006 16
Nov 2006 18
Oct 2006 26
Sep 2006 25
Aug 2006 20
Jul 2006 27
Jun 2006 11
May 2006 29
Apr 2006 71
Mar 2006 41
Feb 2006 22
Jan 2006 28
Dec 2005 36
Nov 2005 33
Oct 2005 50
Sep 2005 10
Aug 2005 8
Jul 2005 15
Jun 2005 13
May 2005 19
Total 1456

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Send mail to jon@g7jjf.com with questions or comments about this web site.
Copyright 2006 Jon Welch
Last modified: 17-08-2010