In a similar vein someone once told me that they'd ran Unix on a TRS-80. (In case you don't know, older *nixes required a mainframe to get running.) The TRS-80 ran a BASIC prompt.
There were UNIXes that ran on desktop hardware as far back as the early 80s. In particular, the certain TRS-80 models were sold with Xenix -- a port of UNIX that Microsoft did which later was passed on to SCO (the original company in Santa Cruz, not to be confused with the notorious Utah company that ended up owning the name)
The place I read that from probably was trolling.
(Then again, IIRC the original V6 source code was 10K or so lines, which doesn't really match up with that statement. (That it was a hog.) I figured it was just written in a way that needed lots of memory.)
Thanks by the way. Filling little gaps in my knowledge like that is always a treat.