3 ms·
There was a big rewrite around MVS, but z/OS to this day executes a lot of code in 24bit address mode of S/360[1], and well, OS/360 code should mostly just run
by p_l 5y ago
There was a big rewrite around MVS, but z/OS to this day executes a lot of code in 24bit address mode of S/360[1], and well, OS/360 code should mostly just run
[1] Easy to observe when running z/OS under Hercules, as one of the console modes shows the CPU address size mode. A lot of the time during bootup of basic ADCD you'll see 24, a bit less 31, and rarely 64
- rbanffy 5y ago31 bits ought to be enough for anyone.
- p_l 5y agoAt least on z/OS, executable code still needs to be in lower 31bits space
- monocasa 5y agoIf it ain't broke, don't fix it. And if it's broke just a little, someone probably depends on it for compat.
- gjvc 5y agohttps://www.hyrumslaw.com/ https://www.hyrumslaw.com/