An assortment of 71B questions

[Dave Frederickson]

(04-12-2021 02:14 PM)Dave Britten Wrote:  4. Does anything particularly bad happen if multiple LEX files with the same keyword are loaded? For example, KEYWAIT.LEX and the Finance ROM both provide the KEYWAIT$ function.

The short answer is no, nothing bad happens. But this brings up some questions about LEX files and their "priority".

First, a keyword in a LEX file will override a mainframe keyword by the same name. But what if two LEX files contain the same keyword, which one gets executed?
We know that the HP-IL ROM can't be upgraded by copying the version 1B LEX file to the 71, presumably because the HP-IL ROM is in Port 0.05 and has a higher "priority" than a LEX file in RAM or plug-in ROM. But then why does configuring the JPC ROM in a lower numbered port than a copy of the 1B HP-IL LEX file allow the ROM to be upgraded?
Back to my first question, what if the two LEX files are in MAIN RAM? There's no Port number that can be used to establish "priority", so which one gets executed?

I'm sure the answers are somewhere in the IDS. I just haven't found them, yet.

Dave