HP2116 inventory

An overview of the 2116B & C configuration can be found at: http://www.cs.ubc.ca/~hilpert/e/HP21xx/HP2116.html A lot of the information you need to get the boards sorted out and installed correctly is provided there. bitsavers has lots of manuals for the 2116B. When I was working on my 2116C I garnered a lot of info from the 2116B manuals, however if someone has service manuals for the C it would be nice if scans could eventually find their way to bitsavers. These shouldn't be necessary to get the processors going, other than to ask whether there was some alteration within the processors to accomodate their connection that needs to be undone. This would appear to be an almost complete 2116B and could be made more complete with stuff from below. The proviso may be the state of the core stacks behind the backplane (more below). You may be short one 'driver switch' board which may limit how much of the core can be used. Might be interesting to figure out just which type of mux board those two are. You should be able to correlate their numbers to something listed on: http://www.cs.ubc.ca/~hilpert/e/HP21xx/iointerfaces.html A second set of CPU boards is there but most of the second half of this list is memory stuff for the B. Unfortunately, there doesn't appear to be any memory for the 2116C; and it's also missing the MAD/A14 board. Weird that there are so many power-fail boards - only one is required per machine. If these are 'cubes' they sound more like the core stacks for the 2116B, although I don't really understand the numbers on some of the connector labels, as they don't correlate with the board locations I would expect, but I've never actually played with a B. In the 2116B the core stacks are mounted behind the backplane. Be interesting to find out whether the core stacks back there are intact or missing. If you haven't figured out yet how to access this area, it's on my web pages. It's not obvious, but quite cool the way the machine opens up. (The core for the C is on standard-size boards labeled "SSA") This is a regulator control board for the power supply, I believe for the 2116C. There are some subtle differences between the equivalent boards in the B & C. Once again you need to access the interior of the cabinet to find out whether it's missing from one machine or a duplicate. (Based on the part number it's presumably something to do with the 2160 power supply extender.) (.. yet more (?)) Don't know about that one. That would be neat if they did, except that I don't see the IO interface boards for them listed. There's not much in the way of I/O interface boards in either of the lists but I think you could hope to at least get the 2116B to the blinkenlights stage (toggling a blinkenlights program into core and executing it, and which will of course stay there so it doesn't have to be retoggled every time it's powered up.) Good luck, should be a fun project. If those loose core stacks are the only ones present I just hope they haven't been bashed around too much.