On Sun, 29 Jan 2017, Chuck Guzis wrote:
In addition to what Fred mentioned, there are some drives that employ
the "in Use" line to allow the host to illuminate the drive. I've got a
couple of YE Data drives that behave in this manner. On 8" drives, this
corresponds to "Head Load". It's pin 4 on the interface and is
active-low. You could probably tie it to the appropriate "drive select"
pin.
I would assume that the jumper configuration I'd set would have done that
- it has two settings, "UA" - front led handled by the In Use signal and
"DA" - front led handled by the Drive Select signal. My K4 has a pair of
Shugart 455's in it (that work fine), but I REALLY don't want to go to the
hassle of pulling a drive out in order to see if the jumper settings
match. :) It may come to that though.
g.
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