19 Jun
2019
19 Jun
'19
7:11 p.m.
On 06/19/2019 08:23 PM, Bob Smith via cctalk wrote:
My recollection, Unix on the 11 started with the 20
but because of the
limited capabilties, it really was done on the /45.
The three rings or 3 execution levels were not supported on the
original machine.
MMU and expanded memory would be a great help in a
multi-user system. The original PDP-11 with 56 KB of memory
was pretty limited. Great for DOS-11 and RT-11, but more
complex OS'es needed more resources.
Jon