[Ed in SoDak]

Glad you got something useful out of that rambling, lol. X-10 is still around, you don't hear much about the TI implementation though, but maybe some searching will lead you to the circuits if not the original TI X-10 module/software. Cool beans for the time and the concept has survived the years. http://www.x10.com/home/

Micropendium did do a fairly complete job of at least mentioning then-current hardware projects that people were playing with. I'm re-reading the June-August '89 3-parter about building a portable TI with several bells and whistles in the console.
-Ed