The PDP11/04 has landed..

8 Feb 2016

...
   I assume they
didn't buy a service contract with that machine?  I doubt  DEC would be real
happy with that.  Also, the 64K RAM chips need an extra
 address pin, were the boards laid out with that signal already in place?

Probably not since the new address signal used to be the +5V supply voltage
(on 16 k chip) which one could assume is connected using one of the middle
layers of  of a multilayer PCB. As mentioned earlier in this thread I did
such a conversion on a MSV11-D board more than 25 years ago and then I had
to lift up this pin and connect it via an extra wire.

/Mattis

...

 (I seem to recall on the VAX 11/780 they had different array boards and
 memory controller when going from 4K to 16K DRAM chips.)

 Jon

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The PDP11/04 has landed..