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Cool! I've just never seen doc about that. yep.

David Durand wrote: Quite true. That's why IBM says not to use it: unless you code VERY carefully (check you model, etc) you can't be sure of what it'll do. The same DIAG instruction on one model

From an emulation point of view, the current behavior is reasonable, since the actual action of a diagnose instruction executed in supervisor mode is completely undefined, and could even potentially

I’d guess the HCP module isn’t setting an operation exception handler before performing the DIAG 8.

I would expect it to crash. If its not enabled I assume Hercules generates some type of exception which CP does not trap. The original code is old, and in those days we expected people to have some

I do not know enough to determine the cause of VM crashing... but nothing is wrong in NOT allowing a diag call to hercules unless explicitly enabled in the configuration, or later by a hercules

You might want to look at VM/Pass-Through documentation. There's not much though, and it was an added cost item.

There is just one thing wrong with it: if it is not allowed in the hercules config file (with DIAG8CMD ENABLE), VM crashes: /hcp test /19:54:55 HHC00009I RRR...RING...GGG! / / / /19:54:55 DMKDMP908I

Honestly, I don't know why you want to ship backups between systems.? K.I.S.S. — Keep backups simple. I personally don't even do backups from the guest OS instances.? On Linux, I just fully dump

Hello Drew, Thanks! I don't believe I can use RSCS for my VM Backup project. It should lead me in the correct direction, though.

Its already there. HCP command. Dave Sent: 28 November 2022 18:07 To: [email protected] Subject: Re: [h390-vm] Can a VM machine ... As an exercise for the reader, write a generic HYPER (Hypervisor)

Yes.? It's called RSCS.? :-) -ahd-

As an exercise for the reader, write a generic HYPER (Hypervisor) command which issued a Diag x'08' from CP to Hercules.? Make it class C or B.? You then need to enable the appropriate Hercules

Indeed they can. Great stuff! I assume you mean HECnet in particular, not DECnet in general, and are referring to the recent lengthy mailing list thread regarding debugging of some network stack

There is a short intro to channel programming which can be found in the following, which might be of some help, too. GC20-1667-1_intro360arch.pdf

Hello! I'm not the fellow here who's surrounded by DEC gear, but, ah, it's a family of networking protocols used by that family to, ah, communicate. People could send files to other systems, and

Hey! I'm not familiar with DECNet. I'm looking at the possibility of using CTCA to allow the VM Backup program to talk to other copies of itself. The idea being offsite backup or copies of backups.

Hello! I believe I originally proposed that sometime earlier. The idea was that we'd each have our machines communicating over the Internet, and sending and receiving files, and perhaps messages. Of

Bertram Moshier wrote: [...] Yes to both. Start here: * https://sdl-hercules-390.github.io/html/hercconf.html#CTCE As far as documentation describing actual CTCA functionality goes (i.e. how it works

Hi, When I was at T.I. I wrote a program to connect two virtual machines running CMS to each other using virtual CTCA. I'm wondering is it possible to have 1) Two Hercules systems on the same Windows