[HECnet] This is probably been asked already but....

[Bob Armstrong]

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?

  Also, 11S could run without any kind of disk or mass storage (e.g. a
complete 11S image could be downloaded via MOP) but I don't think 11M ever
could.

  RSX-11S was the "embedded system OS" of the PDP-11 world (at least as far
as DEC's offerings went).

  In an unrelated question - was RSX-20F (the CFE for the KL10) based on
11S?   In ran on an unmapped 11/40, so I assume it must have been.

Bob