Sean Caron scaron at
Wed Sep 23 16:52:39 CDT 2015

Any easy way to post pics of the top side of both boards? I can't
definitively ID them but we should be able to make a good guess as to
what's actually on there looking at all the major ICs...

Did you just buy this? :O



On Wed, Sep 23, 2015 at 5:40 PM, Josh Dersch <derschjo at> wrote:

> Hi all --
> I just added a PDP-11/44 to my collection and it appears to have some
> manner of cache upgrade; it's made by Digital Data Systems (DDS) and
> consists of two cards, one hex-height labeled "SC44 SETASI" (in the place
> of the normal 11/44 cache board) and a second quad-height labeled "1051" at
> the end of the first backplane.  The two are connected via a ribbon cable.
> I know DDS made some seriously nice upgrades for the 11/70 but I can't find
> anything on this board set at all.  I'm assuming it's just a souped-up
> cache but it'd be nice to know more (and docs would be excellent of
> course).
> Thanks,
> Josh

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