<a M9192? The list I have shows it as being a "DUAL HEIGHT CPU BRD", whic <is "real" informative! According to the list I've got the 23's CPU's hav <different numbers. M8186 PDP-11/23 (KDF11A) M8189 PDP-11/23 (KDF11B) < <They both have 256KW of 18-bit memory. This brings up an interesting <question, how many bytes are there in in a Word when you're talking <PDP-11's? Since it's 18 my guess would be 2 with parity bits. Correct the extra are parity and it's always 2 8bit bytes to a 16bit word. <SCD-RQD11/EC -- this one had 6 connectors for ribbon cables I believe this is a distribution board for the RQDX1/2/3 floppy/hard disk controllers. <M8059-KP -- I believe it's 64k, is it for PDP? 256kb(128kw) parity memory. <M3104 DHV11 -- It's got two ribbon connectors, by guess is it's for addi <other terminals. I seem to have a pair. These are terminal line controllers with silos and modem controls. Handy! <Distributed Logic Corp. DQ342 -- no idea, two ribbon connectors Unknown to me. <Plessey P/N 70590-100A -- looks to be a RAM board There were a lot of third part ram suppliers. Allison