3 Feb
2017
3 Feb
'17
1:35 p.m.
On Feb 3, 2017, at 4:28 PM, Josh Dersch <derschjo
at gmail.com> wrote:
On Fri, Feb 3, 2017 at 1:17 PM, Paul Koning <paulkoning at comcast.net> wrote:
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
...
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.