NOTE: Personally, I was fat, dumb, & happy on S/370 hardware until late 1987, which was well into the VM/XA SF era. What follows are what I recall from casual conversations with people shortly after that.? So I wasn't there at the beginning, my memories are 35 years old, and I have no notes.??
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On Mon, Nov 11, 2024 at 12:41 AM, William Denton wrote:
I'm not even sure VM/XA CP even had any VM/SP or VM/HPO code. The progression was:
?
CPTOOL (???) ¡ª>
VM/XA Migration Aid (1982?) ¡ª>
VM/XA System Facility (1985?) ¡ª>
VM/XA SP (1988) ¡ª>
VM/ESA ¡ª>
z/VM
?
CPTOOL was internal use only to help get MVS/XA up. I don't know from who, when, or where it came, but time wise it may have predated VM/HPO.
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I doubt the CPTOOL changes came from the official VM/370 team; the CPTOOL team may have just grabbed the virgin VM/370 source and ran with it.
I was told that the VM/SP HPO folks did make serious progress to run on XA hardware, but the VM/XA official releases all came from the CPTOOL tree.??
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-ahd-
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p.s. An example of the IBM VM/XA folks going their own way: After DIRECT on VM/SP acquired profiles (with one copy of each profile accessed by all users), DIRECTXA on VM/XA got it too, but its?implementation had the profiles expanded in line. This resulted in a large shop having 25,000 identical copies of the profile in the directory.? They were not happy.??
--
Drew Derbyshire
Software Hobbit (SRE Emeritus)
Kendra Electronic Wonderworks
Kenmore, WA
