Wanted: jumper settings for Teac FD-235HF-101 - test-drb@ccmp.vtda.org

23 Aug 1999

--- Tony Duell &lt;ard(a)p850ug1.demon.co.uk&gt; wrote:
...
  > some recognizable names (D0, D1, FG, H-HI...) and
at least one with a
 > mysterous name (OP)... 
...
  > AFAIK, pin 16 on a standard floppy is the MOTOR
ON signal... 
...
  Silly suggestion. Have you tried linking pin 16 on the
drive to the drive 
 select line (pin 14 most likely). Leave the drive select wire connected 
 there as well. So that the motor goes on whenever the drive is selected. 
I have not tried jumpering any pins together among other reasons because
on my Amiga schematics, pin 16 is driven by a discrete transistor rather
than directly off of a Gary pin (custom chip used in Amiga floppy controller).

...
  Alternatively, what about using whatever pin on the
DB25 corresponds to pin 
 10. That's what becomes pin 16 after the IBM-twist, and thus is the 
 motor-on signal for the second drive. That's probably the more likely 
 setup, actually. 
According to my records...

 2 - chng
 4 - inuse 1
 6 - inuse 0
 8 - index
10 - sel 0
12 - sel 1
14 - inuse 1 (yes, it's tied to pin 4 on the schematic)
16 - mtron
18 - dir
20 - step

etc...

Do I have this wrong?

-ethan

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