[HECnet] Simplest PDP-11

[Brian Hechinger]

On Sun, Feb 3, 2019, 16:15 Johnny Billquist <bqt at softjar.se wrote:

> On 2019-02-03 22:02, Brian Hechinger wrote:
> > What is the simplest PDP-11 CPU/peripheral design that is capable of
> > running RSX-11, RSTS/E or BSD?
>
> Define "simple" please. :-)
>

The easiest to implement with limited tools.

> Also, what is the minimum disk space needed to install those operating
> > systems? I have a plan. Probably not a good one but I'll likely learn a
> > lot in the the process so it won't be a waste of time.
>
> RSX-11M-PLUS can run from two RL02, if you just accept the pregen
> system. But that's the smallest. If you want to build stuff, something
> like an RK07 is required, and that is 28 Megs. But I think it's
> recommended that you have two. But that probably is for more reasons
> than just running the actual system (it is hard to do an update if you
> are running on an RK07, and the update media is an RK07).
>
> RSX-11M definitely gets away with less. RSTS/E would be similar, I
> think, while BSD probably wants a little more.


Ok, that's what I needed to know (more ballpark than anything else is fine)

Thanks!!

-brian
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