PDP-11/20 in Iowa (x3)

Guy Sotomayor Jr ggs at shiresoft.com
Mon Mar 27 18:03:44 CDT 2017

Yes, the MEM11 is about 1/2 assembled at the moment (I just haven’t had the time
to finish it…you know WORK gets in the way).

TTFN - Guy

> On Mar 27, 2017, at 3:46 PM, Ethan Dicks via cctalk <cctalk at classiccmp.org> wrote:
> On Mon, Mar 27, 2017 at 6:35 PM, Steve Malikoff via cctalk
> <cctalk at classiccmp.org> wrote:
>> After seeing this modern memory board project for the PDP-8/e using NVRAMMs
>> http://www.tronola.com/html/ram_for_pdp-8e.html
> I have a couple of those I need to solder up.
>> I wonder how much effort it would be to refactor the Omnibus logic to Unibus
>> to build a PDP-11 version, and thus have a quad size card for /15's and /20's?
> Conceptually, it's not much different for Unibus.  There's at least
> one project out there that's working toward this but not yet available
> for purchase.
> If I was in a real hurry, I could take a quad prototype board and roll
> my own.  I happen to have a handful of DS8641s on hand from making
> Unibus COMBOARDs 25 years ago.  The quantity of discussion on this
> list about modern Unibus transceiver replacements is rather large and
> merely mentioning it is likely to cause a flare-up.
> -ethan

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