CompuServe Messages

#A4091 Controller

    10-Jun-93 22:17:48
Sb: #103457-#A4091 Controller
Fm: John Gager 71336,624
To: Paul Wright 74135,1044
Well I did some checking today on the external SCSI-II connector and hopefully will have that problem resolved. I ordered a high density DB-50 to standard SCSI-50 cable. Since I'm building a tower case for all my external drives, this should work out. Actually, it wouldn't be too hard to make a DB-50 SCSI-II to DB-25 SCSI adapter if I could just get my hands on the high density DB-50 connector. Which brings me to a question for you SCSI guru's. While looking at the pinout for the DB-50 external connector on the 4091, something doesn't seem right. If it is truly SCSI-II then shouldn't it have more than a 8-bit data bus, like 16 or 32? Here is the pinout and maybe you can see what I'm talking about: Pin's 1-25 are ground with except for pin's 12 & 14 reserved, and pin 13 open. Pins 26-33 are /DB0-DB7, and then the rest are other SCSI command and handshaking lines. The only data path is DB0-DB7. Now I don't know that much about the SCSI-II spec, but it sure looks like regular SCSI to me. Which brings another question of why they used a DB-50 external connector if it is just regular SCSI specs? Maybe it's a misprint in the manual, but if it isn't, then I would like to hear from someone on how they are managing SCSI-II with such an arrangement.