On Mon, Jun 15, 2020 at 1:33 AM Chuck Guzis via cctalk <cctalk@classiccmp.org> wrote: > On 6/14/20 8:41 PM, dwight via cctalk wrote: > > ... Do remember that Intel's claim to > > fame wasn't just micro processor. They were one of the first to do > > MOS RAMs for big machines. They were more into solid state memory > > systems than uPs, until after the 8080. > > Intel Memory Systems Division was largely responsible for saving Intel's > bacon in the early 1970s... > > However, selling DRAM assemblies for various minis (e.g. DG and DEC) as > well as S/370 add-on memory amounted to a large portion of their early > sales.
I happen to have the guts for a 2MB IN-1670 memory system for the PDP-11/70 - backplane and cards, but no box and no PSU. https://books.google.com/books?id=fB-Te8d5hO8C&pg=PT1&lpg=PT1&dq=in-1670+intel+memory&source=bl&ots=RkDfYzcrxx&sig=ACfU3U2WL1-0-sXnyP46t2CKekXWfv5hxg&hl=en&sa=X&ved=2ahUKEwigrvyoo4fqAhXYTDABHQRsDrMQ6AEwAXoECAwQAQ#v=onepage&q=in-1670%20intel%20memory&f=false It's a stack of 16 memory cards covered in 4116 DRAMs and a couple of control/management boards that cable over to the 11/70 the same way a DEC MK11 box does. > Have a look at section 7 here: > > https://johncargin.files.wordpress.com/2013/12/intel-catalog-1973.pdf Excellent reference. A couple years too old for my DEC memor system, but I happen to have a tray of MSC-4 parts and some early SRAMs, DRAMs, and EPROMs documented there. -ethan
