On Sun, Apr 2, 2017 at 11:49 AM, Mark G Thomas via cctalk <cctalk@classiccmp.org> wrote: > > Unfortunately, I discovered slots are all wired Q22/Q22, no top ABCD > (Q22/CD) PMI slots like a BA23. So, not good for an 11/83 CPU wired > for PMI on slots C-D. > > So, I was hoping I could get my KDJ11-B (quad-wide 11/73) running in it. > Upon power up or reset I get "Testing in progress. Please wait" on > the serial console, and the LEDs get stuck on test 56. CTRL-C doesn't do > anything yet, and my only options seem to be to hit reset, or if I hit the > run/stop toggle, I can reset to the ODT prompt. This is with either just > the KDJ11-B in the top slot, or with the addition of a suitably configured > MSV11-QA in the next slot. If I turn off the LTC on the front panel, > I get the expected Error 61 M8190 clock error, PC and register values, > and options to re-run once or loop on test, so I know the LTC is working. > > I confirmed the KDJ11-B works fine in a BA23, getting past test 56. I also > tried an 11/53 CPU here in the ABAB backplane and that gets past the self > tests into dialog mode, but I really would like to get the KDJ11-B working > in this chassis. I do see that a couple traces to the KDJ11-B C-D slots > besides the Grant Continuity connections. I assume since the KDJ11-B > has those Grant Continuity connections on slots C-D, it can run in a > qbus/qbus Q22/Q22 quad Q-bus slot. >
If you know the Q22/Q22 backplane is not good for an 11/83 CPU, why would you think it would be any different for a KDJ11-B 11/73 CPU? They are both M8190 boards and both have PMI signals on the CD half of the CPU board. Whether an M8190 KDJ11-B CPU board is called an 11/73, 11/83, or 11/84 is a boring discussion that has been rehashed here multiple times, the important thing is don't put one in a Q22/Q22 backplane and expect it to work correctly. -Glen
