On Sun, Oct 16, 2022 at 08:56 AM, Bob Polmanter wrote:
I don't have my system available in front of me at the moment but to the best of my recollection those change files were controlling the OPTIONS COPY member, for the support of varying the AP=YES/NO selection in DMKSYS and thus including an extra COPY member in the conditional assembly.
There are other control files, aux files, and then code which are included when AP is selected for a build. I've forgotten the details, but I used it on our 4381[-P2]?, as it had an attached processor, years ago. You are correct about the lack of performance improvement. If I recall correctly Fish, and others, have not implemented the EPCS:VM assists for that.
I learned update control on CDC KRONOS and NOS operating systems in the early 80s and into the 90s. When I shifted to VM/SP 6, and found there was an equivalent methodology, and commands, I started using them and practiced on DMKSNT, and DMKSYS. This helped me when I started applying PUTs, and re-installing SP 6 & upgrading to later releases. Especially as our consultant 'skipped'? using VM/SES during the original install.
I also took advantage of XEDIT's UPDATE feature and applied it to management of local code, REXX, EXEC, and so on. For my own sanity, as well as helping those who might later follow.
Since most of us no longer have to share our VM/370 installation, yes, this is overkill, but if you want to learn what happened in those days, it is, in my humble opinion, worth trying. Practice on DMKSYS, and change the name of your host with the SYSID macro, and making the time match your particular time zone.
If you just want to change the time, look at Hercules V4.x, and the TZOFFSET. The following is from my configuration file.
# Spring/Summer/Fall US Central Daylight Savings Time (CST)TZOFFSET??????? -0500# Fall/Winter/Spring US Central Daylight Time (CDT)#TZOFFSET??????? -0600#?????????????? + indicates east of GMT#?????????????? - indicates west of GMT#??????????????? 00 = hours#????????????????? 00 = minutes (India for example)I Hope This Helps
?... Mark S.
Mark A. Stevens