Josh Dersch derschjo at
Thu Sep 24 02:02:56 CDT 2015

On 9/23/15 2:52 PM, Sean Caron wrote:
> 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...
Yeah, I took some pictures this afternoon (a bit blurry -- it was dark 
and all I had was my cell phone, I'll try to get better pics tomorrow):

> Did you just buy this? :O
Yep :).

- Josh

> Best,
> Sean
> 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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