I believe that this is a MicroVAX 3100 M40 (and that should be identical to
M30 except for the case).

The boot floppy booted to the installation program OK.

Thanks for the good work.

The hardware is:

KA45-A V1.2-343-V4.0
08-00-2B-33-D2-C6
32MB

DEVNBR    DEVNAM           INFO
------    --------    --------------------------
     1         NVR    OK
     3          DZ    OK
     4       CACHE    OK
     5         MEM    OK
                      32MB = SY=8MB, S0/1=8MB, S2/3=8MB, S4/5=8MB
     6         FPU    OK
     7          IT    OK
     8         SYS    OK
     9          NI    OK
    10        SCSI    OK
                      1-DSP3107 2-DSP3107 3-RZ24    5-RRD42
                      6-INITR