> On Nov 22, 2016, at 5:43 PM, william degnan <billdeg...@gmail.com> wrote: > > On Tue, Nov 22, 2016 at 8:13 PM, Guy Sotomayor Jr <g...@shiresoft.com> wrote: > >> >>> On Nov 22, 2016, at 4:40 PM, Josh Dersch <dersc...@gmail.com> wrote: >>> >>> >>> So... maybe I just completely missed the memo on this, and maybe there's >> still something wrong with my backplane... is it possible that slot 9 of >> the 11/40's CPU backplane is wired *specifically* for an M7800? I guess I >> need to spend some time tonight seeing what the differences are... but now >> I need to go attend to a cranky 2yo who just woke up from a nap… >>> >> >> I seem to recall something similar with one of the 11/40’s I was working >> on. I believe that because the 11/40 CPU backplane is wired for an M787 >> that things don’t work quite right if you try and install an M7856 into the >> SPC slot in the backplane and try and use it and not the M787. There is a >> way to jumper the CPU backplane so you can use na M7856 and not the M787. >> I haven’t really investigated it in detail (and it’s been a long time since >> I messed around with the 11/40 at that level). >> >> TTFN - Guy >> >> > I have my 11/40 fired up right now too. I can load BASIC and I have a > M9312 with a M7800 that returns serial signals/monitor running. I have the > CPU backplane, two core planes (empty), a DD11B and an DD11C. I can > operate without a grant card in slot, but I can't boot up using RL02 either > way, still trying to track down if I have a UNIBUS issue. > > If there is something I can measure for you, for comparison purposes, let > me know. I will be around tomorrow too during the day. I live near Phila, > it's 845PM Tuesday at the moment here. >
Hmm. I just realized that folks are having trouble booting an 11/40 from an RL02. My 11/40 (which is a *big* configuration) has an RL11 in addition to the RK11D and in the past I’ve booted it from an RL02 with no problems. So I suspect it’s some sort of Unibus configuration issue. I haven’t fired up the system since I moved it a few years ago so it would likely take a bit to check things out. TTFN - Guy