Had to look it up, 8110 for MOS memory, and 8120 for bipolar memory is what field guyde list says. I think the there was some change from special select parts and a move to schottky 74S series around the time of the 45/50 days. http://www.ibiblio.org/pub/academic/computer-science/history/pdp-11/hardware/field-guide.txt
but my memory could be wrong - 11 group did a bit of rebranding with model numbers and parts change, 11/40 was faster than 11/35, but if you changed a wire, they were the same. bb On Sun, May 20, 2018 at 8:49 AM, Noel Chiappa via cctalk <cctalk@classiccmp.org> wrote: > So I notice that M8120 controller card for the MS11 seems to share its etch > with the earlier M8110 variant (the M8120 says "M8110" in the etch :-); so the > differences must be component/configuration/ECO. Does anyone happen to know > what the differences between the two are? Thanks! > > Noel
