It wasn't F11 though it could be done. It was a LSI-1 and later the T11.
Also Alpha micro used the same chipset as LSI-11 do do the AM100.
Neat...I sure wouldn't mind getting ahold of one of those. They're pretty
rare, I'd guess, no?
Likely rare as the company was not a big one and PDP-11 on s100 would be
rather unDEC in the software support. At best rt11 might have been doable
if all the device drivers were rewritten. I'd bet those that were sold
(the bulk of them) are in embedded systems.
The alpha micros were pretty popular though not cheap and they may be more
common.
Allison