Actually, you are correct about it being SPM/OL. The DOS/VS
modification was to insert an EXCP to "read" a card. Power intercepted
the READ and moved the buffer to the input queue as if it had been read
from the card reader. I was just starting out at the time, so I had no
idea how that was supposed to work, but it did. I had already done
quite a bit of ALC coding, so I knew the instructions, just didn't know
how the smoke and mirrors worked.
The guy that came up with this fix also set up our system to run
Power(old Power that ran real mode only) to run in virtual mode. He
preloaded a program that page fixed what Power needed fixed in memory
and then loaded Power in on top of itself. This allowed us to run a 1MB
DOS/VS system with Power and four partitions on a 64K 370/125. Needless
to say there was a substantial paging overhead...with at least a 16 to 1
folding ratio...
McKown, John wrote:
-----Original Message-----
From: IBM Mainframe Discussion List
[mailto:[EMAIL PROTECTED] On Behalf Of Steve Arnett
Sent: Monday, October 24, 2005 11:42 AM
To: [email protected]
Subject: Re: PREVENTING TAKING TOO MUCH STOR IN ISPF
There was one. It was called SPM and ran on DOS/VS. With a
three card
modification from a fellow in Lubbock by the name of Stu Childre, it
even submitted jobs directly to the Power queue.
Something called SPM/OL (Source Program Maintenance/Online, IIRC) also
ran on OS/VS1 under CICS. I don't know if it was the same SPM as DOS/VS
or not. I do remember "doing something" so that it could submit jobs
under CICS. Something about using a user SVC to do a "S RDR" some how.
The details are no longer accessable by my memory controller <grin>.
--
John McKown
Senior Systems Programmer
UICI Insurance Center
Information Technology
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