PDP-11 info needed.

At 18:19 07-07-98 -0400, mbg(a)world.std.com (Megan) wrote: -- snip -- >>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? >You don't mean an '11/23' chassis... it may be a BA23, or a BA123 (or >a BA-11). If you have a J-11 chip on a board, we'll need to know >more about the board. Is it dual high? (KDJ11-A -- 11/73A). Is it >quad high? (KDJ11-B -- 11/73B or 11/83, KDJ11-D -- 11/53, or KDJ11-E -- >11/93). Is there memory on the board? (KDJ11-D or KDJ11-E) Is there >a space for a 40-pin chip? (FP chip, KDJ11-A and KDJ11-B) etc. >Then again, you could tell us the M-number and we could tell you what >it is... :-) I took a look at that board last evening. It's indeed an 11/73 as the module # is M8192-YB. Thanks to the "Field Guide to Q-bus and Unibus Modules" found at sunsite.unc.edu I found this mentioned. I had just found that FG @ sunsite:) That field guide is *really* handy! However, no maintenance has been done on it since 1995 it seems. I have five M-numbers to add that I found in the 11/34A which are not on the list. They are for the five-board set designated as "RK611". This RK611 is the controller set for the RK07 drives which were hung onto the machine. The #'s are M7900 thru M7904, inclusive. Any of you know if either this guide is just stagnant or is there a fully maintained, up-to-date version anywhere? The 11/23 chassis I have is the small 5" high chassis which has the plastic bezel and several switches on the front panel which says it's an 11/23. I did not have time to pick it up and find the BA# yet. I'll inventory the other boards in it tonite if I am allowed into the garage;) --Chris -- -- Christian Fandt, Electronic/Electrical Historian Jamestown, NY USA Member of Antique Wireless Association URL: http://www.ggw.org/freenet/a/awa/