Stephen Davies wrote: > At least VMS meant something. > > Virtual Memory System > > Before that (on PDP-11's) there was > > RSTS - Resource Time Sharing System > RT-11 - Real time 1.5kb Kernel! > RSX (-11A -11B -11C -11D -11M -11S -11M/Plus) - Resource Sharing > eXecutive (IIRC) > Very few outside of DEC would have come upon -11A, B or C. > -11S was a memory only O/S. You could load it from DecTape > > Then on Dec-10/20's there was TOPS > Can't remember what that one was. > > Quiz for those old enough to remember. > 12704 > 00100 > 12703 > 00200 > 60304 > > What is the answer (in Decimal Please) and how could it be simplified. > > > > W > > I guess that's PDP-11 machine code. I use to be able to read that straight off, but that was a long time ago. I think I still have a programming card around here somewhere. If my memory serves me right it's loading 64 into R4 and 128 into R3. I'm guessing the last instruction is add R3 and R4 but it might be a subtract. So the answer is probably 192.
I think TOPS stood for Timesharing Operating System. I never used it, but I used RSX-11D and RSX-11M+ at various times MikeD -- Please post to: Hampshire@mailman.lug.org.uk Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire LUG URL: http://www.hantslug.org.uk --------------------------------------------------------------
