Some PDP-11 info (was Re: C compilers for RSTS/E?)

Jerome> PIC is standard in the USR since it moves up and down in Jerome> memory ALL the time. So I do not understand why you even Jerome> mention the PIC aspect, let alone that something special Jerome> needed to be done, although perhaps with overlays, something Jerome> extra was required. On the other hand, device drivers which Jerome> execute their overlays within the USR buffer do that all the Jerome> time. Memory is a bit rusty, but I think what I did was to define an overlay buffer (probably one or two blocks long) essentially as part of RMON. So displacements from overlays to RMON would be constant, no matter where RMON was loaded. Taking advantage of that saves space, because you can reference RMON data and code without having to do it PICly -- just use PC relative addressing. However, that requires an assembler that can be told "this code might link at X, but it will execute at RMOVBF". Jerome> The only aspect I see a being a REAL difficulty is that it is Jerome> on hard copy. Any idea how many pages. 2-3 inches of line printer output? paul