DDS SETASI SC44 info?
scaron at umich.edu
Thu Sep 24 11:58:27 CDT 2015
Nice score; the system looks pretty loaded! I checked out the pictures and
I believe the "SC44" board is indeed simply a cache memory ... no VLSI or
bit-slices on there to imply any compute capability. The "1501" board is
just a little stub with a few bus driver ICs on it; looks like they are
running lines from the private interconnect ribbon cable, back to the
On Thu, Sep 24, 2015 at 3:02 AM, Josh Dersch <derschjo at gmail.com> wrote:
> 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
>> On Wed, Sep 23, 2015 at 5:40 PM, Josh Dersch <derschjo at gmail.com> 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"
>>> the end of the first backplane. The two are connected via a ribbon
>>> I know DDS made some seriously nice upgrades for the 11/70 but I can't
>>> 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
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