--- CLASSICCMP_at_trailing-edge.com wrote:
John B. writes:
> >I have a PDP-11/05... replace the RX01 system with an RX211 and an RX02...
> To get to *real* basics:
>
> The RX11 is a programmed I/O device. The RX211 is (as usually used) a
> DMA device. You'll probably have to remove the NPR continuity wire across
> the slot when you put the RX211 in it, and ensure that this signal is
> continuous up to that far too.
I doubt you are short of double-height grant cards, but I have a wad of
non-DEC ones because SRC used to ship our own with every Unibus COMBOARD.
Let me know if you're interested.
When I get my flatbed scanner back from loan, I'll add both of our designs
to the "field guide".
-ethan
=====
Even though my old e-mail address is no longer going to
vanish, please note my new public address: erd_at_iname.com
The original webpage address is still going away. The
permanent home is:
http://penguincentral.com/
See
http://ohio.voyager.net/ for details.
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Received on Thu Mar 09 2000 - 15:38:30 GMT