It's just a memory board and looks like one! Picture here:
https://www.mediafire.com/file/ive7i7ax6zdibv3/Screenshot_20211019_185019.png/file cheers, Nigel On 2021-10-19 5:21 p.m., Chris Zach via cctalk wrote: > Sounds familiar, got a picture of the board somewhere? > > C > > On 10/19/2021 12:57 PM, Nigel Johnson Ham via cctalk 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? >> >> any help appreciated, >> >> Nigel Johnson >>
