24 Sep
2015
24 Sep
'15
9:58 a.m.
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 <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):
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 <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"
> 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
>
>