19 Oct
2021
19 Oct
'21
4:55 p.m.
Hm, ok all my Plessy boards are dual height, 1mb boards. Are you sure
the 11/23+ is working, and do you have the CPU in slot 3 with the memory
board in slot 4 (staying away from the PMI slots)?
C
On 10/19/2021 6:51 PM, Nigel Johnson Ham via cctalk wrote:
It's just a memory board and looks like one!
Picture here:
https://www.mediafire.com/file/ive7i7ax6zdibv3/Screenshot_20211019_185019.p…
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
>>
