Post I made on the Yahoo ICOM
710 group which is relevant here. Specifics of cable and how connected included:
Replied earlier, but apparently it did not post.
As posted, you need EX2144. It uses direct UART access so it must be run on a native MS-DOS machine (not the DOS command shell running under Windows). The machine must also have a physical serial
port (USB emulation will not work).
Note that EX2144/1726 may run under the MS-DOS shell, but they wont be able to communicate with the radio
because they can't do direct UART access from there.
Terminology: this is not cloning, it is "programming", so the process is different.
My notes on doing this attached. These are based upon having actually done it.
Note that the cable you need is an OPC-552 programming cable. It is a DB9 to male mono pin cable. It connects to the cloning port on the rear of the tranceiver.
Be sure and read the instructions that are normally bundled with EX2144. If you don't have them, I can upload/post.
Good luck. Please post your results.