Johnny
Since you are something of a "Johnny come lately" - sorry, I couldn't resist
that - it's idiomatic for a newcomer - you won't, like all the grey beards
on the list, remember the "Program Logic Manual" available usually with a
"Y" letter - in place of "C" or "A" - for licenced users of a software
product.
Supposedly it contained sufficient information abort the product that the
folk responsible for diagnosing problems with the product could get a handle
on what was wrong.
Indeed it was also useful for people really to understand their product
since the regular manuals never seemed to have sufficient information to get
the best out of the product - or alternatively just knowing the raw logic
avoided the misunderstandings/ambiguities propagated by the authors of the
regular manuals.
I haven't been looking for any such manuals lately but I guess they have
become a "thing of the past". The nearest equivalent these days I suppose is
the generic "Diagnosis" manual.
Whether or not even a regular manual contains control block relationship
diagrams is a matter for the manual author and the developers who feed
him/her their stuff. Thus it's not guaranteed that any "service" manual
actually will contain such diagrams although probably they should.
In presenting troublesome operands - naturally I have NCP in mind - I have
even had to construct such diagrams from the text descriptions of control
blocks - so, if you want a better picture, you can get out a paper and
pencil. <g> I just happen to be reminded of this lately having rediscovered
these diagrams in a presentation while researching another thread.
Incidentally, I hope you are aware that "core dump" means a dump of the
system storage where the "core" refers to an ancient technology for computer
storage.
Chris Mason
----- Original Message -----
From: "Johnny Luo" <[EMAIL PROTECTED]>
Newsgroups: bit.listserv.ibm-main
To: <IBM-MAIN@BAMA.UA.EDU>
Sent: Thursday, May 31, 2007 3:19 PM
Subject: What is 'Program Logical Manuals'?
I got this website while doing google search:
http://www.users.cloud9.net/~bradmcc/ibmsongbook.html
At the bottom of the page there is an example MVS task management control
block diagram and it says:
*IBM* <http://www.users.cloud9.net/~bradmcc/ibmsongbook.html> Program
Logic
Manuals are full of diagrams like the one above (I apologize for the poor
quality of the reproduction!). The diagrams show how system control
information is stored in "control blocks", and how fields in a given
control
block point to other related control blocks. These diagrams help
programmers
and debuggers to find information about the system, for program
development
and debugging (*esp.* finding information in "core dumps").
I'm interested and just wonder what is 'program logic manual'? I know IBM
has manuals named MVS Data Areas but they don't have diagrams.
Thanks.
--
Best Regards,
Johnny Luo
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