In <6469079386912310.wa.alanaltmarkus.ibm....@listserv.ua.edu>, on
12/29/2014
at 10:44 AM, Alan Altmark <alan_altm...@us.ibm.com> said:
>Yes, lots of articles, and at the end of the day, you still have no
>idea how the machine you have is implemented.
Well, we used to, back when customers could order CE manuals that gave
the details. These days, you get broad brush overviews that tell you
that, e.g., the millicode is an extended subset of z but not what
instructions were removed or what was added.
As you noted, the allocation among the levels and even the number of
levels changes from generation to generation.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
We don't care. We don't have to care, we're Congress.
(S877: The Shut up and Eat Your spam act of 2003)
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