My favorite PDP-11 / LSI-11 instruction was 014747 octal: mov -(pc), -(pc). It would fill all of memory with copies of itself. I actually had a use for that, t

My favorite PDP-11 / LSI-11 instruction was 014747 octal: mov -(pc), -(pc). It would fill all of memory with copies of itself. I actually had a use for that, to get a board that had core memory to a known state.