VAX 11/780 is getting ready to run, UDA50 diagnostics, how?

Hi, with great pleasure I can announce that I have my VAX 11/780 almost running. If you search the archives you will recall that I got an error in the microdiagnostics at test 54. If I had only paid attention to what someone had written on the label of the micro diagnostics floppy label: "remove ethernet card or test 54 will fail!". With that card removed, the test succeeded. The basic CPU diagnostics fails since last winter though (failing module: M8230) but other tests are still passing, so I expect I can replace that module later. hangs during the boot and the disk is never accessed. My UDA50 card actually does something: the LED cycling pattern stops and the other LED set signals that it's stuck in phase 3 of something. But hey, that is good news, since it means that the boot process actually talks to the UDA50 on the UNIBUS!!!! Tonight I'm going to check the UNIBUS wiring in section C, where that special bridge needs to be interrupted. This could explain why the UDA50 isn't functioning properly. Now some question to you veterans: I actually have a UDA50 diagnostics floppy and also a DIAG SUPERVISOR floppy. Yet I don't know how to run any of those. Don't even know how to look at the directory of those floppies, because @DIR is a command file that is only on the console floppy. So, how is this diagnostics started? I even have a second RX01 floppy drive installed, just don't know how to use it with the console program (I guess I would like to make myself some copies of the critical floppies before bitrot sets in.) Finally, since I now have the 11/785 board set and KA785 backplane complete, does anyone have the console and diagnostics floppies for the 11/785? thanks,, -Gunther