Apple Disk Transfer
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Apple Disk Transfer

ADT is the "Apple Disk Transfer" utility. Paul Guertin originally developed ADT as a way to transfer 5.25" disk image files from PC directly to diskette on a 48k or larger Apple II and to send 5.25" diskettes to PC where they are saved as .dsk disk image files. A typical ADT setup is an Apple II/IIe/IIc/IIgs with a serial card or built-in serial port connected via a NULL modem cable to a PC's COM port or a classic Mac's modem port with each computer running ADT.


Download ADT releases here.


19 August 2017: ADT 2.41 is released. This marks a more concerted effort to be hosted on github and incorporate a couple of creature comforts: leave the transfer screen up at the end of a transfer in order to let the user review the results, and change the defualt transfer speed to 115.2k, which has been the standard for ADTPro client and server for years.

8 July 2007: ADT 2007_2 is released. ADT now can operate with Laser 128 compatible computers. MacADT has also been added to the distribution.

3 June 2007: ADT 2007 is released. ADT now automatically scans for and detects appropriate serial hardware. Bootstrapping text files are included with different line endings (PC, Unix, Mac) though ADTPro's bootstrapping instructions are simpler and can even use the cassette ports.

27 Dec 2006: ADT 2006 is released. Some goodies from the ADTPro project have been incorporated into ADT. See the releases page for details and downloads.

31 Dec 2005: ADT now has a new home at BerliOS. BerliOS provides web hosting, a download service, and a Subversion source code repository. See the project page for all the goodies.

Setting Up and Using ADT

Download and unzip the archive. The result is a folder named "ADT_2007_2". This includes server programs for Windows, MS-DOS and MacOS, as well as two popular Apple II-side programs.

Host Side

  • adt.exe: A Windows32 version of the PC server program by Sean Gugler.

  • adtdos.exe: An MS-DOS version of the PC server program by Paul Guertin.

  • MacADT.sit: Stuffit archive of the Mac server program by Hideki Naito.

Apple II Side

  • ADT: This is the original ADT (now at version 2.41). It is intended for use on an just about any Apple II or compatible.

You will need to transfer the Apple II-side ADT program to the Apple II.

The ADTPro project has bootstrapping instructions that simplify and speed up the bootstrapping process with new server software, but it does require Java on the host computer to run. Otherwise, the included text documentation files discuss how to set up a NULL modem connection, do the transfer, and more. Also see the comp.sys.apple2 Apple II newsgroup and feel free to ask questions.

This ADT distribution allows running ADT under Windows or from the MS-DOS prompt. To start the Win32 version, double-click adt.exe or run it from a Command Prompt.