UNIBUS PDP-11 memory expander card

[Noel Chiappa]

    > From: Jacob Ritorto

    > I just happen to have one in my hand as we speak. I'll photograph it...

Hmm. That photo (here:

  http://ana-3.lcs.mit.edu/~jnc/jpg/PDP11s/AbleENABLE.jpg

if anyone wants to see it) shows a very different card than the one in
the brochure. That one's a hex card, with an over-the-back connector:
this one's quad, no OTB connector.

This looks more like a QNIVERTER?


Does it say 'ENABLE' on it anywhere? (Which would imply there was more
than one variant... which would be interesting, because I have this bit
set that the one we had at MIT was not like the one described here:

  http://gopher.quux.org:70/Archives/usenet-a-news/FA.unix-wizards/81.07.09_ucbvax.2202_fa.unix-wizards.txt

because I'm pretty sure that on ours, the DMA devices were on the far side of
the ENABLE - which makes sense, because ours had separate PARs and UNIBUS map
registers, which make no sense in that configuration - unless Mike [blessings,
wherever you are] made a mistake in drawing that up.)

	Noel