Hi!
Now it I see things somehow more clear.
Also, that command: d u,,,000,256 is very very interesting! I like it!
Now all this confirms what I was thinking... but, since that commands apears to yield a kind of 'map' of expected CUU<->Device-Type i feel more confident on be able to go further.
As a side note, I've not (still) experienced any issues regarding terminals... but after reading around about the 3270s, telneting IPL and so, I feel I will get onto it at some time.
By the way, I'm carefully taking notes of all I do, so, in the event of finally making my way through, I expect having everythin noted, just in case.
Thank you very much!