Ack!!! Vox ate my post. So first some text and I will add the links and pics later. Anyway another PDP11. This time a Micro 11/23+. The + is for 22 bit addressing. The original 11/23 came out in 1979 with 18 bit addressing. The plus version was a bit later.SO I am not exactly sure how old this one is so lets say circa 1980.
The PDP 11/23 was a QBUS computer. The QBUS was a lower cost bus compared to the Unibus. It did not have separate memory and address lines etc. The QBUS was utilized on the DEC PDP 11/03, 11/23, 11/23+, 11/53, 11/73, 11/83, and 11/93. It was also utilized on various microVaxen.
Anyway, this one consists of a BA23 chassis, KDF11-BA cpu board, RQDX3 drive controller, 3rd party memory (whopping 256 kilobytes), RX33 floppy and yes a 3.5 inch floppy.
The front panel is homemade. It is part of the BA23 covering and an old style rack panel combined.
I wish I could say it was fully functional, but it appears the 20 meg hard drive has finally died. And this was the one with Adventure/ Colossal Cave on it!!!!! Anyway, I guess I need to look up error 15.