Hi Ethan, I've seen the M780s before, but its been a while.
The DT03 and DT07 are Unibus switiches. I have several edited option/module lists I can look up boards for you. Also a fellow list member just scanned a hardware spare parts list that could have some relevant info in it. I'm sure he'll be posting it soon. I can probably help you with the Diablo drive, and maybe the H720 later in the year. Have Fun, Paul On Sun, Aug 21, 2016 at 10:36 PM, Ethan Dicks <ethan.di...@gmail.com> wrote: > On Sun, Aug 21, 2016 at 1:53 PM, Noel Chiappa <j...@mercury.lcs.mit.edu> > wrote: > > http://gunkies.org/wiki/KA11_CPU > > Interesting stuff on the KT11, but tangentally, I've been going over > my pile of parts (that I've described a few times over the years) from > an 11/20 I pulled from the dumpster at work 30 years ago. I finally > got around to photographing the module handles and inventorying many > of the boards and I've learned a thing or two and have generated a > question or two. > > First, the manufacture date for most of the parts is in 1972. The > front panel says "11/20", so that all jibes. I appear to have a CPU > (more below), an M7800 DL-11 console interface (not the older > multi-board KL-11), a lot of MM-11 4K core sets, and a happy surprise > (again, more below) and not much else from that extraction (no > bootstrap card, for example, or peripheral adapters). > > Second, many/most of the CPU modules are -YA variants, and the "PDP-11 > Field Guide" mentions that they would be part of a KH11-A. About the > only description I can find for what that is, is a single mention (in > PDP-11_PeripheralsHbk_1973.pdf) of the "large-system capability > option" related to the DT03-F Unibus switch requirements. Anyone know > what this is? I'm reasonably certain it doesn't matter for my needs, > but I'm curious. > > Third, the happy surprise is a full set of boards for a KE11-A. I > have been sniffing around for a KE11-B (single-board version), and > now, I don't need to (as long as this one works or can be repaired). > This excellent for me since my goal all along has been to fire up > enough hardware for Warren Toomey's reconstruction of ~1972 UNIX (v1 > kernal plus v2 utilities). Yes, I know I can run that on SIMH (I > have), even wrapped up in a Docker (I will), but I've wanted to run it > on the real hardware for 11 years and I'm one step closer. I have a > RK11-D that works, and an RK11-C that will likely require much > attention (never tried to use it), so the only thing I'm really > missing (besides enough time to repair/debug all of this) is something > to emulate an RF11 for the swap disk. I'm now doubly sad that I lost > my Diablo 30/RK03 in a flood 25 years ago, but I'll be functional with > an RK05 or two. > > Fourth - I don't think I got the H720 power supplies with this (or the > fans) - that was what I think was removed prior to this unit hitting > the dumpster. I may have the G772 power cards (and then again, I may > not), but those wouldn't be hard to reproduce. I am entirely > satisfied with modernish switching supplies, but I see the H720 puts > out about 15A of +5V and -15V, plus -22V for the core and +8V for the > front panel bulbs. The bulb voltage is probably no big deal to come > up with, but -22V is a bit of an oddball. I'm also willing to forego > 100% core in favor of MOS memory, including any modern repros that > come out in the next year or two. To start, finding even one H720 to > run the CPU box (I have 2 more boxes for the rest of the memory) would > be enough to get going. > > So... for now, as I continue to pull the parts together, my real > question is, what is a KH11-A? > > Thanks for any enlightenment. > > -ethan >
