On Oct 2, 2019, at 6:50 AM, Clem Cole &lt;clemc(a)ccc.com&gt; wrote: On Tue, Oct 1, 2019 at 7:00 PM Chris Hanson &lt;cmhanson(a)eschatologist.net <mailto:cmhanson@eschatologist.net>> wrote: I’ve seen it said a couple of places that the DG/UX kernel was an almost complete rewrite and rather well-done. Indeed - we worked with it at Locus and was one of the simplest kernels to add things too. The locks were easy to understand and it was well documented/thought out. Have any details been preserved? There’s not a whole lot out there that I’ve been able to find about DG/UX or the AViiON workstation series (whether 88K or Intel x86). Never seen it in the wild, sadly. Hope it does appear at some point. -- Chris PS - I’ve found that my asking around has prompted some people to put things online, so may as well keep asking in various places. :) +1