Actually Xenix was never a Microsoft branded product.
Maybe true, but it was certainly plastered with Microsoft copyrights. All the
scripts and headers in the Tandy 16/6000 version were copyright Microsoft.
Then again Xenix was the clear proof that M$ can not
even compy a great OS
correctly. I remember using a version of Xenix that only allowed 8.3
naming of files (like M$-DOS)! Typical M$ "innovation"... pheb!
I doubt it. I think early versions of Xenix had the v7 filename limits.
I've never seen one that recognized extensions as anything special.
Eric