[Simh] PDP-8: The possibilities?

[Ray Jewhurst]

Then I guess we need to decide which model  the quintessential pre-omnibus
machine would be. The 8/S would probably be a bad choice to start since it
is kind of an oddball.

On Sep 8, 2016 8:34 PM, "Ethan Dicks" <ethan.dicks at gmail.com> wrote:
>
> On Thu, Sep 8, 2016 at 8:04 PM, Davis Johnson <davis at frizzen.com> wrote:
> > I've always been fascinated by the PDP-8S, in part because of the great
> > story behind it. I keep seeing references to it not being 100%
compatible
> > with the other PDP-8 systems. How different was it (or how was it
> > different)? Is there any 8S specific software extant?
>
> The only thing I can thing of is FOCAL knows about all the variants,
> including the -8/S and does "the right thing".  I don't know of code
> written for the -8/S and only the -8/S.  Mostly, everyone was trying
> either to be inclusive of several models, or the specific model they
> were writing for, or, eventually, just the OMNIBUS models without
> going to any lengths to work with the pre-OMNIBUS models.  It kind of
> depends on when the code was written and if the code was planned to be
> shared outside of the place it was written.
>
> ISTR the first 3 models (PDP-5, Straight-8, and PDP-8/S) were the
> least like later models and dropped off the table first.
>
> I started with the PDP-8/L, so much of my focus is finding stuff that
> reaches back at least that far.  I also care about the oldest models,
> but I think the biggest "split" is OMNIBUS or pre-OMNIBUS.
>
> -ethan
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