Thank you Shmuel:
I had completely forgotten those libraries and that part of the
system "gen". I didn't actually become a sysprog until MVS/SP2 (XA).
And I don't know about z/VSE either. I've gotten the latest
manuals, just don't have time to read them all.
Steve Thompson
On 5/31/2023 10:36 PM, Seymour J Metz wrote:
Back before SYS1.LPALIB, Nucleus-resident SVC routines were named IGCxxx and were linked
into IEANUC00; transient SVC routines were named IGC00xxx with a C zone on the last
digit, resided is SYS1.SVCLIB and ran out of 1 KiB (2 KiB in OS/VS1) SVC transient areas.
The names endured, but since SVS the system just pages in transient SVC routines. The
EBCDIC code pages I've used had C) as "{".
DOS/360 had A and B transients; I don't know whether those survived to z/VSE.
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
________________________________________
From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of
Steve Thompson [ste...@wkyr.net]
Sent: Wednesday, May 31, 2023 9:32 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Q: Transient SVC ?
Sorry, but I have to ask this: What do you mean by a transient SVC?
In days gone by, I remember that SVCs had to have specific names,
so the last char of the SVC could be a "non" printable name (hazy
memories of this from having to fix/patch an SVC).
I know that DOS, DOS/V* had transients that we (DOS to MVS
migration teams), in some cases had to turn into an SVC for use
in MVS.
Just trying to remember how some of this stuff used to work/be done.
Steve Thompson
On 5/31/2023 8:42 PM, Seymour J Metz wrote:
For transient SVC name it was a trailing C0; I was just contrasting member
names with index levels. I guess that IBM decided to eliminate an alleged
ambiguity between member name and relative generation.
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
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Regards,
Steve Thompson
VS Strategies LLC
Westfield IN
972-983-9430 cell
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