I'd like to
hear more about this SCSI monitor - was it data over SCSI, or
some kind of control thing, or what? 
 It actually got all its data over SCSI. I suppose its main application was 
 the
  very oldest compact Macs which didn't even have
any PDS slot. 
Forgot to mention...
There were SCSI-interfaced Ethernet adapters for SCSI-equipped Macs... got one
of those, too...
-dq