[Simh] Which PDP-11 to choose

[Will Senn]

All,

Is there any particular reason to choose one model of PDP-11 over 
another in the sim? I am a user who is usually only interested in using 
one of the various programming languages available on the dec oses - I 
frequently use RT-11 for BASIC or ASSEMBLY and Unix V6 and V7 for C and 
for fun, as well as an occasional foray into RSTS-E and lately RSX 11-M 
Plus to try and find the perfect OS for as many programming languages as 
I can get in one place. In my language/os explorations, I generally just 
grab somebody's example ini file or take a default machine 11/40 or 
11/94, but it's been pretty will-nilly on my part. I'd like to have some 
kind of rationale related to necessity, but it doesn't really seem to 
make much difference. I know the 11/45 had split I/D, making it 'better' 
than the 11/40 and that the unibus is different than the q-bus and I'm 
sure the hardware support is different between the models, but I haven't 
really been prevented from running anything that is runnable... but of 
course, if I was prevented, I just chalked it up to who knows why that 
didn't work, so I might never know if I'm missing out on the El Dorado 
of ancient OSes. Does anyone have some guidelines to help choose which 
model configuration is appropriate for various needs? Or, in this day 
and age of endless supplies of ram and memory, should I just load it up 
to the biggest, baddest, pdp-11 of all time and leave it at that (and if 
so, which one is that?).

Thanks for the assist.

Regards,

Will

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