@xssfox When I worked in finance, we had Sun pizza boxes with SCSI terminal expansion ports. Connect this accessory to your SCSI bus and get eight (twelve? sixteen?) more serial ports (which we used for financial data feeds, like Bloomberg). With Serial Attached SCSI a thing now, and the original rarity, these guys are hard to search for today. Looked similar to this SGI branded one, but not blue. Anyway I bring it up if you want further iSCSI experiment ideas.