Author Topic: OS/2 and the Mainframe  (Read 720 times)

Martin Iturbide

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OS/2 and the Mainframe
« on: September 11, 2019, 10:53:58 pm »
Hi.

This is a topic that just today crossed my mind by checking twitter.

Event that I tried to document my findings on the Wiki, (Category:Mainframe), I still have some doubts and I lack information.

My interest is only from the OS/2 perspective on how it is connected to the mainframe, which drivers OS/2 requires and which software it runs.

I have these questions:
1) Which are the "Support Element" software versions that runs on OS/2 ?
2) Some Mainframes came with a Thinkpad with OS/2 preloaded, how it is connected physically to the mainframe? Serial/Parallel/PCMCIA/Network?
3) Some other mainframes came with a PC with OS/2 (I think it is called HMC -  Hardware Management Console ). how it is connected physically to the mainframe?
4) I don't think I can find a list of which mainframe models used to be compatible with OS/2's HMC, but I will like to build one.  I only have the Multiprise 3000 and the IBM z890 on my list, if someone remember some other model that has OS/2's HMC or know where to get this information, please let me know.

Regards
Martin Iturbide
OS2World NewsMaster
... just share the dream.

Joop

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Re: OS/2 and the Mainframe
« Reply #1 on: September 15, 2019, 03:25:24 pm »
I have a working model of the Data General One. This is the very first laptop running on two 720Kb diskettes and 512Kb memory. When not started with a boot diskette I could enter programs for connecting to a mainframe. In those days the connection was serial up to full handshake. But I don't think that today they still work with serial connections, more likely utp in some form. OS/2 was written by mainframe guys, you can still observe that legacy as soon as OS/2 gets it difficult and needs a way out. I have only see once on OS/2 2.11 the message that I was run out of memory, run out of hard disk space, run out of diskettes. System was still working, but slow. The message popped up that the system needed more memory and that the system wants a new formatted hard disk(!), if I was so friendly to put that in the computer or close system. But in those days hot swappable hard disk was an item not available on the consumer markt  and no internal system on the motherboard to achieve that goal.

Olafur Gunnlaugsson

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Re: OS/2 and the Mainframe
« Reply #2 on: September 15, 2019, 08:11:57 pm »
I have a working model of the Data General One.

I misread this as a Data General Nova, and was for about five seconds ... very impressed ...

Martin Iturbide

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Re: OS/2 and the Mainframe
« Reply #3 on: September 17, 2019, 12:19:43 am »
Hi Joop.

Any pictures or documentation that you may have related to the OS/2 and Mainframe topic is welcome, and I will include it on the wiki.

Ohh,  the  Data General One laptop used to came with a "Pierre Cardin" bag according to Wikipedia  ;D ;D ;D

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Martin Iturbide
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