This implies that any command thrown at it be it MVC or OI, is handled by
the Operating system.
Shirley, you can't be serious!
I'm not familiar with the MVC and OI commands, but if you're
referring to the MVC and OI instructions, these are handled
directly by the CPU. [1]
[1] other than for recovery from page faults, etc.
From: "Van Dalsen, Herbie" <[EMAIL PROTECTED]>
Reply-To: IBM Mainframe Discussion List <IBM-MAIN@BAMA.UA.EDU>
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: What part of z/OS is the OS?
Date: Tue, 29 Aug 2006 09:00:51 +0100
My humble opinion would be the following...
1. OS = Operating system i.e. Any part that operate the system
2. Function =
a) handle all requests from users / other systems... This implies that
any command thrown at it be it MVC or OI, is handled by the Operating
system.
b) notify users / other systems of its current status... This implies
that any part of the system writing SMF records and or send error
messages.
So all error handlers on the lowest level should be included. Any
program etc that handles requests on the lowest level should be
included.
What would not be included is the next layer... IDCAMS / DFSMS that
intercepts the base error codes and tries its best to send a reasonably
understandable error code. The problem comes when the distinction
between layer 1 and 2 becomes fuzzy ?
Regards
Herbie van Dalsen
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Shmuel Metz (Seymour J.)
Sent: 28 August 2006 23:49
To: IBM-MAIN@BAMA.UA.EDU
Subject: Re: What part of z/OS is the OS?
In
<[EMAIL PROTECTED]>,
on 08/28/2006
at 02:13 PM, Alan Altmark <[EMAIL PROTECTED]> said:
>It depends on your definition of of "operating system". The
>classical definition is the chunk of software that manages the real
>system resources, allocating them to application programs.
You don't consider access methods to be part of the operating system?
Common services like DAIR and PARSE?
For IBSYS/IBJOB and OS/360 IBM considered the entire code base to be
an operating system.
>That would be, again classically, just BCP: the thing that holds the
>SVCs.
Not all SVC's are in the BCP, and most of the BCP is not composed of
SVC's, at least not for MVS.
--
Shmuel (Seymour J.) Metz, SysProg and JOAT
ISO position; see <http://patriot.net/~shmuel/resume/brief.html>
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