RL02 version of UNIX6?
paulkoning at comcast.net
Fri Feb 3 15:17:31 CST 2017
> 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.
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