[fjeremic]

The latest one is for z14 [1] and is a very well organized document for compiler writers. I reference it daily while working on the Eclipse OpenJ9 project. Indeed from day to day we mainly work on Linux (Ubuntu 18.04) on our z14 mainframes.

[1] https://www-01.ibm.com/support/docview.wss?uid=isg2b9de5f05a...

[CountHackulus]

Oh interesting, that's definitely changed since I was writing compilers for Z. Neat!