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 Unibus.
Best, Sean On Thu, Sep 24, 2015 at 3:02 AM, Josh Dersch <dersc...@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): > > http://yahozna.dyndns.org/scratch/sc44/ > > >> Did you just buy this? :O >> >> http://vintagetech.com/sales/Big%20Iron/PDP%2011-44/Information >> > Yep :). > > - Josh > > > > >> Best, >> >> Sean >> >> >> On Wed, Sep 23, 2015 at 5:40 PM, Josh Dersch <dersc...@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" >>> 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 >>> >>> >
