What is the KH11-A? (was Re: Differences between the PDP-11/15 and PDP-11/20)

[Noel Chiappa]

    > I recall reading _somewhere_ about some early PDP-11 memory management
    > thing used on early PDP-11 Unix that supported the KE11 ... by having a
    > small window that allowed user code access to the KE11. ...
    > Does this ring any bells for anyone?

Never mind - found it, it was in "Odd Comments and Strange Doings in Unix":

  https://www.bell-labs.com/usr/dmr/www/odd.html

The memory management thing in question was the KS11; I looked, but could not
find anything about it. Does anyone know of anything?

	Noel