> On Feb 3, 2017, at 4:28 PM, Josh Dersch <dersc...@gmail.com> wrote:
>
> On Fri, Feb 3, 2017 at 1:17 PM, Paul Koning <paulkon...@comcast.net> wrote:
>
>> ...
>> 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.
>>
>
> EIS was an option on the 11/40, it was not standard.
> https://pdos.csail.mit.edu/6.828/2005/readings/pdp11-40.pdf, section 2.4.
I saw that stated earlier, too, but DEC's PDP11 architecture handbook doesn't
appear to confirm that. Either that or the model differences table is sloppy.
paul
