Unibus/QBus transceivers and drivers - was Re: PDP-11/20 in Iowa (x3)

[Toby Thain]

On 2017-03-27 6:46 PM, Ethan Dicks via cctalk 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.

It just begs for a conclusive summary. Perhaps those who are actively 
building stuff will eventually provide one (not necessarily on the list 
per se) :-)

--Toby


>
> -ethan
>