On Mon, Dec 14, 2015 at 1:33 PM, Mattis Lind <mattisl...@gmail.com> wrote:
> 2015-12-14 17:12 GMT+01:00 william degnan <billdeg...@gmail.com>: > > > Just to change the subject.. > > > > There were "S" and an "NC" version of 11/05 high profile system. Why? > > > > I am curious if any DEC historians here know the reason for two versions > of > > the same DEC PDP 11/05 *high profile* computer (not talking about the low > > profile). There are separate manuals for each type. > > > > Age? The NC (and ND if you are in 230VAC area) are in the BA11-D chassis > which uses the H750 PSU. The same chassis was used by for example 11/35. > The H750 PSU has partly the same assemblies as the low PDP-11/05 chassis > and then also a H744. The memory system is somewhat different in that the > H214 is 8kW and the H217 is 16kW and the former is used in the NC/ND while > the S uses the latter. > > But of course there can be all sorts of other reasons as well. > > /Mattis > > > > Yes I did know that power supplies and RAM are different within the two versions, being that have both types of 11/05. That's what prompted my question - *why* did they make these two versions of the high-profile 11/05? What was one used for vs. the other? *Why did DEC do this*? It is simply that as long as the box had the M7260/M7261 CPU cards it was an "11/05"? (or 11/10) Those of you who knew DEC back then may have a perspective I don't on the subject. Seems to me that they did not care, they just used what they had available. -- Bill
