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
