Bob Armstrong wrote: One of the goals of 11M was to get something that could run on a really small PDP-11 without an MMU, which 11M can. M can run without an MMU?? RSX-11S can, but I don't think 11M can. OK, 11S is just a stripped down 11M, but it was still a separate product. Can you actually gen an unmapped system with a 11M distribution? I have RSX-11M V4.0 RL01 kit, RSXM32 volume is an unmapped RSX-11M. -- RSX-11M V4.0 BL32 28.K (BASELINE) -- SYSGEN asks if generated system should be unmapped, so probably you an generate it :)