MAC ADFS Explorer


Disc Transfer

Mac ADFS Explorer is a companion program to my MacBeebEm program and allows you load disc and hard disc images, view files and copy files to and from your Mac's hard disc. If you don't already know, ADFS was one of the disc filing systems used by the BBC and Master 128 range of computers.

Hard disc images are used by the excellent BeebEm Acorn/BBC emulator program. Hard disc emulation was added to BeebEm at version 2.3 Beta 3 and further enhanced in version 3. Instructions for using the hard disc images are in the README.TXT file contained within the BeebEm installation file. Hard disc images are also supported by my Mac Port of BeebEm.

Disc images are used by most BBC/Acorn emulator programs. 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 ADFS discs or hard discs using the disc transfer facilities built into Mac ADFS 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 ADFS disc images in any of the following formats :

  •  40T single sided ADFS (S) - adf (160K)
  •  80T single sided ADFS (M) - adf (320K)
  •  80T double sided ADFS (L) - adl (640K)
  •  4 Head, 32 Track, 33 Sectors hard disc - dat (1MB)
  •  4 Head, 64 Track, 33 Sectors hard disc - dat (2MB)
  •  4 Head, 128 Track, 33 Sectors hard disc - dat (4MB)
  •  4 Head, 256 Track, 33 Sectors hard disc - dat (8MB)
  •  4 Head, 512 Track, 33 Sectors hard disc - dat (16MB)
  •  4 Head, 1024 Track, 33 Sectors hard disc - dat (32MB)
  •  4 Head, 2048 Track, 33 Sectors hard disc - dat (64MB)

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


It shows the contents of the disc image in a similar way to Windows explorer. You can navigate the folders on the left and selecting them will show the contents of the folders on the right.

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). Directories can also be displayed in *CAT, *CATALL, *EX or *EXALL formats.

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

You can also export whole directories or even the whole disc in one go by use of drag and drop or menu options.

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

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

Also, if you are good at creating program icons and would like to design an icon for this program, please get in touch as I am really pants when it comes to anything artistic !

You can download the latest version of the program below :

To help cover costs, I have decided to make MAC ADFS 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 MAC ADFS 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 MAC ADFS 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 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
02/01/21 2.1.3 Added other bits I can't remember :(
Support for CF cards
Edits hard drive images directly rather than load image into memory
Directory tree should load faster for larger hard drives
Compiled as 64 bit version for latest MacOS
xx/xx/xx 2.0.1 Fixed bug in Save Disc Image option
06/10/07 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
16/09/07 1.0.2 Added option to send ADFS disc format program to remote computer
21/07/07 1.0.1 Added WordWise file viewer
Added Copy/Select All to clipboard from File View menu
(to allow easy transfer of single program listings to BeebEm)
Added Save Disc Image option
Added *EXALL Drive option
Added some keyboard short cuts
Can drag/drop disc image to program icon to auto load disc image
09/12/06 1.0.0 Initial Release

Date Downloads
Nov 2010 7
Oct 2010 10
Sep 2010 10
Aug 2010 8
Jul 2010 17
Jun 2010 6
May 2010 14
Apr 2010 5
Mar 2010 14
Feb 2010 8
Jan 2010 13
Dec 2009 14
Nov 2009 13
Oct 2009 11
Sep 2009 7
Aug 2009 2
Jul 2009 11
Jun 2009 5
May 2009 11
Apr 2009 15
Mar 2009 12
Feb 2009 7
Jan 2009 10
Dec 2008 19
Nov 2008 11
Oct 2008 13
Sep 2008 14
Aug 2008 11
Jul 2008 8
Jun 2008 7
May 2008 7
Apr 2008 9
Mar 2008 23
Feb 2008 12
Jan 2008 9
Dec 2007 9
Nov 2007 9
Oct 2007 14
Sep 2007 8
Aug 2007 11
Jul 2007 9
Jun 2007 6
May 2007 8
Apr 2007 5
Mar 2007 5
Feb 2007 10
Jan 2007 18
Dec 2006 8
Total 493

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Copyright 2006 Jon Welch
Last modified: 17-08-2010