On 2013-07-16 02:42, Boyanich, Alastair wrote: Was there ever a UNIBUS DSSI controller or were they all XMI only like the KFMSA ? That d be pretty convenient to use either: $DSSI_CONTROLLER <-> HSD <-> BA350 <-> SCSI to CF adapter or $DSSI_CONTROLLER <-> HSV <-> BA356 <-> SCSI to CF adapter As others mentioned - DSSI existed for Qbus. But no, nothing for Unibus. However, seems like a long way around to get to SCSI by using DSSI. Why not go SCSI direct in that case? Johnny