I really appreciate that, all the things I can find under that board number (which is simple the pcb etch) are from vendors who want to sell you one and have no idea of the model number.
I too, have no idea of the model number, but have tried search for all sorts of PM-MSV11 etc with no luck. I will wait with bated breath! cheer, Nigel On 2021-10-21 1:30 p.m., Derek Newland via cctech wrote: > Hey, FoothillsGeek here! I saw this thread last night and checked to see if > I had a manual for it - it does not look like I do. Most of the Plessey > documents we received are for core memory boards. > > However, when I indexed the docs we received, I did so by model number > (PM-xxxx) and not by part number. So, if I can find our stack of Plessey > docs, I'll flip through them again to look for the PN. > > On Thu, Oct 21, 2021 at 8:49 AM steven--- via cctech <cct...@classiccmp.org> > wrote: > >>> On 10/19/2021 12:57 PM, Nigel Johnson Ham via cctech wrote: >>>> I am trying to bring up an 11/23 system in a BA23 box, and the only >>>> memory i have is an obscure Plessey one. The only identification is the >>>> p/n 705920 with dash-100 in white ink. By counting the chips I make it >>>> 4MB, but it does not respond. Since it takes the full 22-bit memory >>>> space I can't see how any jumpers would change its accessibility. Does >>>> anybody have a manual? >> FoothillsGeek on VCFed had a number of Plessey memory manuals and had >> scanned >> some, as mentioned here >> https://www.vcfed.org/forum/forum/genres/dec/73251-dec-documents-on-manx >> >>