On Wed, 25 Feb 2009 08:48:06 +1100, Franc Zabkar
put finger to keyboard and composed:

On Sun, 22 Feb 2009 14:23:57 +1100, "gcd"
put finger to keyboard
and composed:

such as density select on pin 6 rather than 2 etc. The problem is some of
these interfaces have changed over time, for example the density select can
be either an input or an output or both depending on the drive and the
controller and without the jumper data I'm not sure how the drive is
actually configured to operate.

FWIW, this document refers to FD55-GFR 5.25" drives:
http://www.teac.com/DSPD/pdf/5fd0050a.pdf

There is an LG strap and an I strap that define how the drive behaves
in lo-den and hi-den modes.

There is also an In-Use (IU) jumper set that defines the conditions
under which the in-use LED turns on. The standard jumpering for a PC
AT system is to illuminate the LED whenever Drive Select is active,
whether or not the drive is actually doing anything. Is it possible
that the controller is constantly checking the DiskChange pin and
thereby activating the LED?

- Franc Zabkar
--
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