And to reply to my own post, tonight I took a closer look at the boards and noted that someone had written "3" and "4" on the CPU and memory board handles in sharpie. I checked out the power and ground signals on the card edges and they match up with a typical MUD slot. Based on this I felt it safe to assume that these go in slots 3 and 4 of the 11/34's CPU backplane (the first two SPC/MUD slots).
I pulled the 11/34 CPU boards in slots 1 and 2, the M7859 and bootstrap boards from slot 3 and installed the upgrade boards in slots 3 and 4. Ran the front panel cable to the connector on the CPU board and powered it up. "7" appears on the LED panel and if I hit the "HLT/SS" button I get an ODT prompt! The BOOT button causes the RUN light to momentarily flash, but that's about it. Not sure what else can be done with the front panel, if anything, would be nice to find a manual. At any rate, I've successfully booted 2.11BSD on the upgraded 11/34, and it seems to work well. If anyone out there knows more about this boardset, let me know... Thanks, Josh On Mon, Jun 26, 2017 at 10:58 PM, Josh Dersch <[email protected]> wrote: > Hi all -- > > Snagged an interesting boardset off eBay last week; it was listed as a > PDP-11/34 CPU upgrade with no other details. The set consists of two > hex-height unibus boards -- the CPU board has a J-11 processor on it, the > memory board contains 4mb of memory, and there's an interconnect cable > between the two Not too shabby. I cannot find a model name or > manufacturer printed on it anywhere. "TD104" is silk-screened on both > boards. The boards are marked "AH183" and "AH137" on the handle edge. > > I've put up a set of pictures at: > > https://1drv.ms/f/s!Aqb36sqnCIfMoqF-7tupNHmuXdfguw > > Does this look familiar to anyone? Love to get some more information on > this before I try to use it, I don't want to put it in the wrong system or > the wrong slots... > > Thanks as always, > > Josh > > >
