Dear all,
thank you for all the input!
At this point I have some feedback concerning my original *problem*, the failing GPIB card.
So, I took the 'easy' solution. (Yes, I know I need to make a bolder step sometime in the future....) I set up my still working relatively old pc with a still functioning ISA bus under w98, and used the original tp7.0 IDE (There are 2 options, either turbo.exe, or tpx.exe, both work.)
It was a great feeling of having swung back 25ys in time, and recalling the bright blue background and the yellow text in the editor. It has also support for mouse operation!
After having struggled a bit - not too much - by replacing the GPIB commands for the old card to the ones for the newer (in fact, I don't know if it is really newer), I could successfully compile the turbo pascal unit for the ieee communication, and I could also confirm that at least one portion of the software functions as expected. Since I am sitting at home, I don't have access to all the hardware, so final verification needs to wait. But there should be very good hope.
Concerning the other issues, I should have been clearer. I was talking about 2 different pc's. The other one is a specific PerkinElmer pc: It is called System 3600 and I think it is run with a 6800, the link I got shows an 'identical' pc.
I shall do a proper check what the exact EPROMs are, so I could hopefully duplicate these and put them in the pc, so I can use this equipment for another 30ys. (Why are my kids calling me boomer?)
So, a substantial glimpse of success at the end of this crazy year.
All the Best, Seasons Greetings and Stay Safe
Argus