Digby R.S. Tarvin writes:

> Agreed, but the PDP11/70 was not constrained to 64KB memory either.

> I do recall the MS-DOS small/large/medium etc models that used the
> segmentation in various ways to mitigate the limitations of being a 16 bit
> computer. Similar techniques were possible on the PDP11, for example

Coincidental to this conversation, I'm currently reading "The Apollo
Guidance Computer: Architecture and Operation" by _Framk O'Brien_.
(ISBN 978-1-4419-0876-6)  Very interesting to see what you can do with
a 15 bit architecture when sufficiently motivated.

--lyndon