IBM 4865 (External 3.5" floppy)

[Michael B. Brutman]

Does anybody remember how these connect to a PC or XT?

Obviously there is the DB37 which has the signals.  On one version of 
the drive (the 720KB version) there is just the signal cable, and no 
power pigtail or external power - power must come through the DB37 
cable, but the technical reference for the floppy controller doesn't 
have any pins that provide power.  Was there a special card that passed 
the signal wires through and added +5 and +12 to the DB37 going to the 
drive?  (Maybe on pins 1 - 4, which are supposed to be unused?)

On the other version I have there is the power pigtail, which is 
obviously where the power comes from.  The pins on the power pigtail are 
connected to pins 1 - 4 on the DB37.


Mike