UNIX on PDP-11s (was Re: PDP 11/73 on the Internet)

Pete Turnbull pete at dunnington.plus.com
Thu Jun 4 13:14:23 CDT 2009

On 04/06/2009 17:20, Ethan Dicks wrote:
> On Thu, Jun 4, 2009 at 11:42 AM, John Floren <slawmaster at gmail.com> wrote:
>> Interesting, I didn't know a /23 could run V7--all I know for sure is
>> that it works on /45s and /70s. Do you know any other machines it runs
>> on? I'd like to try installing on my 11/73 (KDJ11-A) if possible.
> I think it would come down to disk drivers.  If the kernel will run on
> an 11/70, there's no difference I can think of off the top of my head
> why it wouldn't run on a KDJ-11, unless there's something about the
> 22-bit Unibus mapping on the 11/70 vs no mapping on the Qbus.
> Disks, though... a 11/73 is likely to have an MSCP disk controller,
> but the 11/70 has quite a number of supported disk controllers.

Yes, and there's no MSCP driver for V7.  Even the RL driver was a 
special case.

Pete						Peter Turnbull
						Network Manager
						University of York

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