<< A so-called "bugger word" has been stuck at the end of each bank—no comments on this terminology, please, since I didn't invent it; when I asked Don Eyles some question that involved them, he somewhat-laconically stated "we called them check sums">>
Huh, and if you have ROM and RAM I guess it literally is a Harvard Architecture
http://www.ibiblio.org/apollo/BlockIII.html
I never thought of that before!