On 05/30/2018 10:33 AM, John Forecast via cctalk wrote: >> On May 29, 2018, at 1:04 PM, Paul Koning <[email protected]> wrote: >> >> >> >>> On May 29, 2018, at 10:30 AM, John Forecast via cctalk >>> <[email protected]> wrote: >>> >>> >>>> On May 29, 2018, at 3:30 AM, Nigel Williams via cctalk >>>> <[email protected]> wrote: >>>> >>>> On Tue, May 29, 2018 at 1:27 AM, Al Kossow via cctalk >>>> <[email protected]> wrote: >>>>> I have 11D on bitsavers. >>>> this is actually RSX-11D? http://bitsavers.org/bits/DEC/pdp11/magtapes/ias/ >>> Yes. The two V3.4A tapes will allow you to build either RSX-11D or IAS. >> Wow, I did not know that. It certainly confirms that IAS is just a slightly >> hacked RSX-11/D... >> >> paul >> >> > Probably more that just “slightly” hacked but certainly not a > completely new design. The scheduler was completely reworked > along with the swapping mechanisms. When I first saw it, there were 2 > user interfaces; SCI> the System Control Interface for > management operations and PDS> Program Development System for normal > users. Before release, both were collapsed > into the, now familiar, DCL> interface. Just remapping DCL commands > onto the standard utilities was a major part of the work. > >
I find this conversation very interesting. I was always led to believe that when Mentec got all the PDP-11 OSes except IAS (supposedly because DEC still had government commitments) that it eventually faded into obscurity and was lost. Obviously, not the case. Has anyone ever approached HP about the possibility of just releasing it all to the world as either Licensed Open Source or just public domain? Not my favorite OS by any means, but better than the nothing we have for the PDP-11 today. bill
