On 2020-07-21 09:35, Seymour J Metz wrote:
I can see the point about creating an unnecessary subsystem, but what's
complicated about looking up a subsystem?
It's not complicated to look up a subsystem, but it could be an
excessive path length. I've seen systems with over 200 subsystems
I can see the point about creating an unnecessary subsystem, but what's
complicated about looking up a subsystem?
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of
Peter
How is using a field for what it is intended for abuse?
"Abuse" in this case is creating a subsystem when there is no need to do
so.
In the past, subsystems were sometimes created solely to have access to
the SSCTUSER field.
And how is N/T easier?
For the same reason as above -- there is
How is using a field for what it is intended for abuse? And how is N/T easier?
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of
Steve Smith [sasd...@gmail.com]
Sent:
Have you never heard of Name/Token Services? It's much easier than abusing
the SSI, and much more efficient.
sas
On Mon, Jul 20, 2020 at 8:29 AM Seymour J Metz wrote:
> If the server creates a system LX, how does the client locate it? Of those
> ways, which is easiest?
>
>
If the server creates a system LX, how does the client locate it? Of those
ways, which is easiest?
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of
Peter Relson
If the AS2 has the capability of switching to supervisor state; why can't
it (AS2) create
its own Cross Memory environment allowing Address Space (AS1) the ability
to issue a PC to AS2 and the PC Service Routine use AR Mode to transfer
data from the Target Address Space (AS2) to the Accessing
Thanks to Charles M for getting this into a form without the HTML.
First of all -- I am assuming PCRTN resides in the Private Area of the
Accessing Address Space (AS1) and PCRTN is defined as a Non- Space
Switching, Stacking PC , with a System LX. Is My understanding correct ?
No it is not. A
Seymour I am agreeing with you
-- Original Message --
From: Seymour J Metz
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Using AN EAX value of PC Routineto index into the Authority Table
Date: Sun, 19 Jul 2020 13:47:32 +
I didn't claim that "every Address Space that needs to
I didn't claim that "every Address Space that needs to access data be defined
as a subsystem." What I did say is that the easy way for a *server* to provide
access is to be a subsystem. The address spaces accessing data from that server
would not normally be subsystems. Don't confuse the
Seymour and Joe
.
Thanks for participating in this dialogue.
I'm still unclear on this procedure.
.
.
Seymour
I agree that AS2 should be a subsystem, I cant see every Address Space that
needs to access data be defined as a subsystem.
.
Joe
'Im not sure I understand you comment -
Are You saying
Part of designing a server address space is creating a mechanism for clients to
identify it. The easy way is to be a subsystem.
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on
"Sorry for the garbled message -.If the AS2 has the capability of switching
to supervisor state; why can't it (AS2) create
its own Cross Memory environment allowing Address Space (AS1) the ability
to issue a PC to AS2 and the PC Service Routine use AR Mode to transfer
data from the Target Address
-- Original Message --
From: Joe Monk
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Using AN EAX value of PC Routineto index into the Authority Table
Date: Sat, 18 Jul 2020 20:27:39 -0500
This is explained on page 113:
"The example also shows the difference between cross memory data
This is explained on page 113:
"The example also shows the difference between cross memory data movement
with a move to primary (MVCP) and a data movement performed through ARs and
the MVC instruction. PGM1 uses the SSAR instruction to establish AS2 as the
secondary address space, then it uses
The HTML character entities make your message almost unreadable. Does your
e-mail software have a way to turn them off?
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
From: IBM Mainframe Discussion List [IBM-MAIN@LISTSERV.UA.EDU] on behalf of
I don't know if this was readable for others but I had to edit it to be able
to read it. I thought I would share my editing. Different mail clients --
perhaps it was better for others as it was. Different strokes ...
Charles
-Original Message-
From: IBM Mainframe Discussion List
Hello. Im reading Chapter 5 Using Access Registers in MVS Programming
Extended Addressability Guide (SA23-1394-30). Pages 113 116
Procedures for establishing addressability to an address
spaceRegarding Figure 38I understand the EAX value of PCRTN indexes into
the AT of AS2.I understand PC
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