Hello Dave,

Bertram (and Jim)

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You don’t say which version of VM you are using! MAINT MEMO B is certainly there on CE1.2 from .

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You still create modifications using update, its just on the latest CE we have provided a separate minidisk, so when we update the system you can quickly put your own modifications back.

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For multiple time zones, you can’t just edit the source because you are using UPDATE. You can either have two mods, or just edit your mod. You could even write and EXEC that generates the update and re-builds the nucleus.

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As for learning about the system, well the original manuals are on BITSAVERS here:-

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and the various memos and help files describe what has been added.

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In some ways its similar to the CMS in zVM but in other ways its quite different. So most command line commands in vm/370 are still in zVM but you may not need them.

Whilst it has REXX the codebase is totally different…..

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Dave

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From: [email protected] <[email protected]> On Behalf Of Bertram Moshier
Sent: 15 October 2022 05:52
To: [email protected]
Subject: Re: [h390-vm] Another Time Zone Question (Sorta)

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Hello Jim,

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I'm logged into Maint and can't find the file MAINT MEMO *.? The Syspro memo doesn't speak to maint memo.? I can't find the vmsetup command.

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Like you I would create CP with local mods by modifying the source code using the update command, etc.

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Where do I start to learn this new system.

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Thank you.

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On Fri, Oct 14, 2022, 22:30 Jim Snellen <jsnellen55@...> wrote:

Hello All,
I too, like Jay Maynard, am trying to specify the correct time zone for my location.? I know that DMKSYS is where it's specified, and I know that I want to change?
'SYSTIME ZONE=0,LOC=WEST,ID=GMT' to 'SYSTIME ZONE=5,LOC=WEST,ID=EDT'.? I also know the sequence number is 00220000.

In my past life, I would simply edit DMKSYS ASSEMBLE and be on my way.? Now that I know that's the wrong way to do it, I don't quite know the right way using the E-disk for local mods.

I see that MAINT MEMO B says to use VMSETUP CP to establish the search order.? OK, next I see that DMKLCL CNTRL E identifies where the local changes are (by way of filetype I presume).? ?DMKSYS AUXLCL E should contain an entry like 'LCLnnnDK xxx Change SYSTIME macro to reflect local time zone and ID'.? I don't know what values are supposed to be used for nnn and xxx.? What is the significance of DK? It also appears I need to create a file named 'LCLnnnDK MEMO E' which contains a lengthier description of the modification.? Finally, I assume another file is to be created named 'DMKSYS LCLnnnDK E' that contains:
,/ R 00220000 $ 00220000 1? ? ? ? ? ? ? ? ?mm/dd/yy? hh:mm:ss
? ? ? ? ?SYSTIME ZONE=5,LOC=WEST,ID=EDT? ? ? ? ?LCLnnnDK

I'm guessing on the replace statement, I'm sure there's an IBM manual that describes how to code these update statements.?
After all is done I simply

1. VMFASM DMKSYS DMKLCL
2. CP SPOOL PUN *
3. CP SPOOL PRT *
4. VMFLOAD CPLOAD DMKLCL
5. ORDER READER nnnn (for IPL deck)
6. IPL 00C CLEAR
7. CLOSE RDR
8. ORDER RDR nnnn (for print file)
9. READCARD CPLOAD MAP?
10. LOGOFF
11. Re-IPL.

So, that's where I am.? I hope somebody can correct my assumptions and put me on the path to righteousness. (LOL)

PS - Can I have two SYSTIME statements, one for EST and one for EDT?? Is the alternative to rebuild CP each time change?