Putting two memory controllers on a 780?

FRANK at UTAH-20.ARPA FRANK at UTAH-20.ARPA
Sun Nov 13 06:37:51 AEST 1983


From:  Randy Frank <FRANK at UTAH-20.ARPA>

One point to be aware about the new MS780-E memory controller.  You MUST add
memory in 2 megabyte (two board) increments so that there is always an even
number of memgabytes of memory.

(For purists: you can run with an odd number of megabytes, but then you can
only put 8 MB of memory on the controller instead of 16, and you must run
non-interleaved.  It turns out the MS780E is really two internal memory
controllers which look like one to the outside world, and that if you want
to use both internal controllers, they MUST have the same amount of memory
on both of them).
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