In all the hundreds of systems I have shipped, I have never put the CPU in slot 3! I was VP Operations of Transduction, DEC's biggest components group OEM in Canada.
No, I don't know if the CPU is good (it is a dual-width KDF11-A btw), but it is in slot 1 AB with a DLV11J in slot 2AB. The memory has been in slot 3 as well as lower. Since there is nothing above or below it on the CD side there cannot be any interference in the CD connectors. I do have an 11/73 dual width board arriving tomorrow so will see if I get the same results with it. Thanks for reading, Nigel On 2021-10-19 7:55 p.m., Chris Zach via cctalk wrote: > 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.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 >>>>
