UNIBUS PDP-11 memory expander card

Eric Smith spacewar at gmail.com
Wed Jan 28 18:28:31 CST 2015

On Wed, Jan 28, 2015 at 3:13 PM, Johnny Billquist <bqt at update.uu.se> wrote:
> So, it also implies that the original MMU have to be removed. And that is
> where you put the new card in.

The PDP-11/34 "original MMU" is part of the base CPU and is not
separable. Upgrading an 11/34 to 22-bit addressing would require
replacing at least one or possibly both of the CPU cards with
something else, in which case technically it's no longer an 11/34.

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