DEC RSX-11D and its COBOL compiler?

[Bill Degnan]

Is AIS the same as AIDCS?

http://vintagecomputer.net/digital/IDACS_11-07/

On Tue, May 29, 2018, 9:46 AM Paul Koning via cctalk <cctalk at classiccmp.org>
wrote:

>
>
> > On May 29, 2018, at 9:38 AM, Guy N. via cctalk <cctalk at classiccmp.org>
> wrote:
> >
> > On Tue, 2018-05-29 at 17:30 +1000, Nigel Williams via cctalk wrote:
> >> On Tue, May 29, 2018 at 1:27 AM, Al Kossow via cctalk
> >> <cctalk at classiccmp.org> wrote:
> >>> I have 11D on bitsavers.
> >>
> >> this is actually RSX-11D?
> http://bitsavers.org/bits/DEC/pdp11/magtapes/ias/
> >
> > As I recall, IAS ("Interactive Applications System") was a timesharing
> > environment layered on top of RSX-11D.
> >
> > When I was working with RSX-11D many years ago, I heard the opinion
> > expressed (maybe by DEC field service?) that RSX-11D was a pig, and IAS
> > was an elephant on a pig's back.
>
> Sounds right to me.  RSX-11/D could fit in 124 kwords, but not all that
> comfortably.  IAS required 22 bit addressing.  RSX-11/M was apparently
> created in response to that piggishness.
>
> I once saw an RSX-15 kernel listing, which had a lot of very familiar
> looking data structures -- it implied that RSX-11/D had its origins,
> at least as far as overall design is concerned, in RSX-15.
>
>         paul
>
>
>