I have these questions:
1) Which are the "Support Element" software versions that runs on OS/2 ?
Please give us a FRU and I can check.
2) Some Mainframes came with a Thinkpad with OS/2 preloaded, how it is connected physically to the mainframe? Serial/Parallel/PCMCIA/Network?
It's not connected physically. Usually a console controller was used.
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?
Please give at least a part number - there were dozens of devices which run internally OS/2 for different tasks.
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.
What's the question here? Do you want to operate 15 to 20 years old systems and need replacement parts today? It would be cheaper to use emulation or a zPDT.