Looking for info on memory

[steven at malikoff.com]

> 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