Mike, It falls into the category of, 'Just curious'. I suspect that along with you and many (most?) others on this list I'm from a generation that's allergic to, 'smoke and mirrors'. I'd always assumed that the answer was simple, obvious and documented in Principles of Operation. I had occasion this morning to be looking at IPL (in P-o-O) (I'm doing some teaching soon and wanted to be sure of the sequence) and that made me think to look to find out how LOADPARM works (in case somebody asks the question) ... but I couldn't find it! (Possibly I've missed it but I did do quite a thorough search.)
I have no actual immediate requirement to access the LOADPARM myself, and I doubt if anybody will ask, but ... I just like to know these things! :-)