I suspect returning to that level of frankness would get you into machine instruction timings - and all that goes with it. :-)
Cheers, Martin Martin Packer, zChampion, Principal Systems Investigator, Worldwide Banking Center of Excellence, IBM +44-7802-245-584 email: [email protected] Twitter / Facebook IDs: MartinPacker Blog: https://www.ibm.com/developerworks/mydeveloperworks/blogs/MartinPacker From: "Shmuel Metz (Seymour J.)" <[email protected]> To: [email protected] Date: 29/12/2014 17:03 Subject: Re: Slushware Sent by: IBM Mainframe Discussion List <[email protected]> In <[email protected]>, on 12/29/2014 at 10:44 AM, Alan Altmark <[email protected]> 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) ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
