RL02 version of UNIX6?

[Paul Koning]

> On Feb 3, 2017, at 4:07 PM, Josh Dersch <derschjo at gmail.com> wrote:
> 
> On Fri, Feb 3, 2017 at 12:31 PM, Paul Koning <paulkoning at comcast.net> wrote:
> 
>> 
>> 
>> 
>> I'm not sure there is one.  DEC OS designers typically would assume that
>> they are dealing with non-broken systems.  Systems with MMU all have EIS...
>> 
> 
> Is this actually true?  I've been working on getting my PDP-11/40 running
> recently, and I don't recall anything in the documentation indicating that
> an EIS was required if you had an MMU installed.  

What I meant is that the 11/40 has EIS standard, according to the PDP11 architecture handbook.  So an OS that depends on MMU would be designed for 11/40, 11/45, etc. all of which have EIS.  And since EIS instructions are quite helpful they will be used.  Not necessarily MUL, in a kernel, but definitely SOB.

	paul