PDP-11 info needed.

Last night I poked a little around the RA60 and the 11/34A that I want to keep. I saw a cable ass'y attached to the RA60 which had two black cables (about 7/8"wide x 3/8" thick) and relatively small plastic 8-pin connector recepticles within a comparatively hefty backshell. Inside the 11/34A cabinet there were a group of four of the same small mating connectors which had four flat, red cables running from that group into a Unibus board in the the BA11 (forgot module number). A 12-foot long cable with two 8-pin plastic connectors each within a large backshell was laying inside the 11/34A box. I extrapulate from a couple of other private msgs that this is probably the UDA50 interface. True? Please tell me about this disk I/F. Any FAQ on it somewhere? Also, I would like to find the same tech info or descriptions on the MSCP interface which I understand the RL01s and RL02s have. Can anyone give me any info on the TS03 tape unit? It is the only one I can keep so I plan to lash it up to the 11/34A or maybe the 11/730 if I indeed keep that (or both by swapping cables?) Looks like a J-11 chip on the CPU board in an 11/23 chassis that was buried in the pile (darn little thing was so small compared to the 5000+ pounds of other boxen that I forgot to mention it in my first msg.) That's basically an 11/73 isn't it? More questions to come..... Thanks so far, Chris -- -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA Member of Antique Wireless Association URL: http://www.ggw.org/freenet/a/awa/