RL02 version of UNIX6?

william degnan billdegnan at gmail.com
Thu Feb 2 13:38:15 CST 2017

> On 2/2/17 11:32 AM, william degnan wrote:
> > All this talk about compatibility...was there ever UNIX made for the PDP
> > 11/40 and RL02, or was it only run on RK05?  Wouldn't all of the C and
> wake
> > calls, etc issues have been solved then?  Why is this an issue now?  I am
> > largely ignorant to the details but from 20000 feet it would seem like
> this
> > would have been taken care of long ago.  No need for pre-processing code,
> > etc.  Please educate me if I am wrong, just curious.
> >
> > Bill Degnan
> >
On Thu, Feb 2, 2017 at 2:36 PM, Al Kossow <aek at bitsavers.org> wrote:

> DEC V7m comes to mind.

Yes, but in 1974 that was not an option. I guess the 74-77 version of UNIX
that would have been installed on a PDP 11/40 would have been made for RK05
drives.  It would prob be worth the effort to find a version of UNIX 6 for
that media and port to RL02, rather than take a vanilla UNIX 6 and try to
make it work on RL02's and re-solve all of the problems that have already
been solved for the RK05 version.  AND the RL02 is larger so moving a
multi-disk UNIX for RK05 disks/partition would  not be confined by space.


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