As a muscle memory check from things 33 years ago, I wanted to know how much the #ibm #mainframe under #zOS has changed from /370 back then.
Yes, we are now at #JES3 - and the new things for me were PDSEs and USS - feels weird calling #OMVS and having a #Linux environment #shell on the mainframe. Ah yes, we did not have #FICON either back then to define CHPIDs but the 3380 and 3390 were actually huge boxes connected via #bus and #tag cables.
And of course #TSOE - with #ISPF. The TSO commands however look still very familiar. Same with procedures/modules in SYS1.PROCLIB, even with the #IEFBR14 "do nothing" program still very useful in #JCL.
The University of Konstanz still had a #Comparex IBM compatible mainframe running, and I wrote a better version of the existing IRC client in REXX. I added the file transfer functions and fixed the EBCDIC-ASCII conversion. Those were the times.
TheCityDweller 