I had never heard of an X-10 system for the Adam until this thread. I know it was released for other computers in the early 1980s and was planned for the Mattel Aquarius.
I noticed there isn't a DSK or DDP image of the X-10 software on the internet yet. If anyone still has a data pack or disk with this software I would be happy to convert it to an image and upload it here.
The X-10 hardware used was not ADAM specific. You could buy the hardware in any electronics stores that carried it and then hook it up to the ADAM via one of the numerous Serial Interfaces that were available. To complete the package, you would need the software driver that was written by Chris Braymen for ADAMLink of Utah/Alan Neeley. I have attached the disk image which you probably already have in your collection, but didn't realize.
I don't recall the exact module number of the X10 hardware used or if it matters, but anyone with a Serial Interface and the software driver could get this all working on the ADAM. I guess it's time to do some searching thru the PDF newsletter... to bad we don't have PDF scans of the ADAMLink of Utah newsletter!