How to tell differential scsi drives and cards apart

Rich Alderson wrote: We had a SCSI development system at Peer Protocols, as well as wide sniffer. on the sense side, with the sniffer, we did hadd an electrical design that could tolerate the misconnection of devices and not catch fire, though we had a standard adapter to go from differential to SE that you were supposed to use. The design used at least with our equipment would be in reset. I don't know what happend if you plugged something in with the power on, but if you connected the pile up and it was wrong and then powered things up, you were covered. Also I don't recall if there was any issues in the device order. My observation in the previous post had to do with seeing the reset on our analyzer when the HD device was connected and wondering why the bus was held reset. It was a non smoking situation. I wonder if perhaps the problem was with the fact it was wide and not the narrow variety of bus? The additional 8 bits and parity were sort of the bastard child added. on after the fact of the original design. It was quite a trick to figure out w/o watching the SCSI Domain info whether all 16 bits were active or just 8 in a give transfer. This might apply to hardware as well. Jim