Exploring the world of minis and mainframes...

While I never worked on a Multics system, I spent a few years working on a couple DPS-8 Mainframes running GCOS-8. The main CPU is just a tiny part of the system. <<<< Tell me about it :-) Very impressive engineers "blinkenlites" inside the doors of each of the system cabinets. Even more fun learning how to start the system up than the preceding 1905E. For the seven years that our University possessed a dual Level 66/60 system I was in effective charge of our systems team. I was the only one who wrote anything in GMAP (three key OS modules had to be in that assembler and were site specific) all our other systems programming was dome in B (and perhaps some Fortran which isn't really that different :-) The biggest pain was the dn355(?) communications processor, but I had delegated that to one of my senior programmers (as he had been responsible for the Digico Micro-16 that had performed the same function on the ICL 1900 system that preceded the Honeywell. Unfortunately, I have very little documentation remaining from the L66 - possibly just the pocketbook (the IBM green card hides in shame in comparison!) Andy