On Thu, Aug 30, 2018 at 10:31 AM William Pechter <pechter@gmail.com> wrote:

Screw IBM for the in cable drive select lines on diskette

You of course realized that was because of field service issues of course.   Setting all floppies (and later ST-506 disks) on the PC and using a twist in the cable meant they did not have to ask FS folks to set the jumpers properly.