On: IBM System 38 (1984) [pdf]

[chmaynard]

This is chapter 8 from Capability-Based Computer Systems, a book by Henry Levy published by Digital Press. Here's the TOC:

http://homes.cs.washington.edu/~levy/capabook/

I remember reading this chapter in the mid 80's when I was starting to develop business software for this minicomputer. The System/38 hardware and OS were not well understood outside of IBM, and Levy's book gave me some sense of what was going on under the hood to make the system secure.

[McElroy → chmaynard]

Searching for descriptor-based computer architecture after reading your comment since it reminded me that I was going to, gave me a link to chapter 10 of the book. https://homes.cs.washington.edu/~levy/capabook/Chapter10.pdf