[HECnet] Simplest PDP-11

[Mark Abene]

A pdp11/53 can run all the OSes Brian mentioned, to which I'd add RT-11,
(specifically) 2.11BSD (no need to run 2.9) and Ultrix 3.x, and that's a
fairly simple and straightforward tower machine, and certainly a lot
smaller and more power-friendly than an 11/70.

-Mark


On Sun, Feb 3, 2019 at 2:15 PM Frank Wortner <frank at wortner.com> wrote:

> If you want to see what will actually run on somewhat limited hardware,
> then Paul Nankervis's PDP11/45 emulator
> <https://skn.noip.me/pdp11/pdp11-45.html>has a nice collection of
> operating systems running on a 256K system.  2.9 BSD boots and runs from an
> simulated RL02.  (2.11 BSD needs an 11/70 or better.)  This should at least
> show what is possible.
>
>
> On Sun, Feb 3, 2019 at 4:44 PM Brian Hechinger <wonko at 4amlunch.net> wrote:
>
>> 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
>>
>
>
> --
> "Jazz music stimulates the minds and uplifts the souls of those who play
> it was well as of those who listen to immerse themselves in it. As the mind
> is stimulated and the soul uplifted, this is eventually reflected in the
> body." -- Horace Silver
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sonic.net/pipermail/hecnet-list/attachments/20190203/193d2edb/attachment.html>