Amiga dongle?

[Rob]

I think the pot on the module with the 23 pin connectors suggests that it is more likely to plug into the video socket on the Amiga.

If you can remove the plastic shells it might reveal some components that may give a clue as to it's purpose.

[Rob]

It's a Sybil.

http://eab.abime.net/showthread.php?t=45307

It's fascinating the way the Amiga's ports have been used for things they were never intended for.  I right about the video port but I'd have never have guessed it's purpose.

There's more detailed info here.

https://www.facebook.com/media/set/?set=a.376981859929.160820.322949344929&type=3

Some of you will know that Jim Drew is a bit more active in the Amiga scene in recent years.  He's been doing stuff for FPGA Arcade.