Adding additional memory to 11/45s

[utzoo!duke!decvax!ucbvax!Mike at BRL]

From:      Mike at BRL

Ken Om..... (Pres of Able Co) had an ENABLE/34 on his 11/45,
and electrically it works just fine.  Clem Cole from Tektronix
has a paper which tells you how to do it -- you can guess, though.
There are 32 PAR registers, which neatly slves the problem.

By the way, I forgot to mention that the ENABLE/34 has (optionally)
an 8 Kbyte cache (for thefull 22-bit address space), so that you
can get even better memory performance.  Also, you can put your
existing 11/34 cache after the ISOLATE/34 board, and "double cache"
your existing memory on the 18-bit bus!  (At least you don't have
to throw it away!).

With an 8Kbyte cache on an 11/34 with 650ns MOS UNIBUS memory,
we got non-floating point performance of roughly 1/2 an 11/70,
so it is probably worth it...
					-Mike