Mac to Bernoulli Cable

The Bernoulli drives I have are all more or less the same, irrespective of their generation. The PC interface card.cable uses a 37-pin (DC37) sub-D connector and that's essentially a SCSI cable with the unused conductors omitted. This makes for fewer conductors in the cable, but, if you look inside the drive, the attachment to the controller is via a 50-conductor ribbon cable, an adapter to which is attached to the bulkead at the rear of the box. The interconnections between the drives are 50-conductor ribbon, and, depending on the generation of the hardware, but for most of the 10 MB 8" drives, the controller is generally a separate card to which the drives attached. It is more or less standard SCSI, though it doesn't work well with other adapters or with ASPI drivers under DOS. I doubt the MAC uses different internal hardware or cabling, though the BERNOULLI drives hung on for a longer time in the MAC environment because of the MAC's smaller size requirement. I have an old Xebec drive which uses precisely the same cabling arrangement as the various BERNOULLI systems I have, and it also is terminated at the drive/controller end in a 50-pin cable from its external 37-pin version. One of the BERNOULLI arrangements I have came with an adapter to the more or less standard Amphenol (looks like a big Centronics) 50-conductor "Blue-Ribbon" connectors. This works because the controller board on the Bernoulli's controller has soldered-in terminations. I'd speculate that if you open a box and attach a typical SCSI-1 device-attachment cable not necesarily with both of the female connectors attached, it will work with standard SCSI cabling. You'll have to make/buy whatever the necesssary adapter from your MAC to the "SCSI-1" cable happens to be, however. Dick -----Original Message----- From: Bill Pechter <pechter(a)pechter.dyndns.org> To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org> Date: Tuesday, March 21, 2000 7:45 AM Subject: Re: Mac to Bernoulli Cable detail. problems