Diskette Drive          
\                                 \
                                   
\           DskChng jumper        \
                           Drive   
  power     Cable          Select  
                                   
 oooo                         X
\                      
                Key Slot
Key
Slot The cable is keyed with a plug at the position of the key slot,
but I've seen cables in which the plug has fallen out.

Attach the cable with pin 1 (which has a colored wire) toward the
slot.

power A separate power cable is needed for each drive.  The connector
is keyed to avoid improper orientation.

Cable Diskette drives are connected by only one cable.  Most systems
have two connectors on the Cable:
                      
  Connected to the     Connect with the colored wire to pin 1 on
  controller           the controller card.  See below.
                      
colored                     
wire                     
(key                     
slot                      
side)    Connected to the 
    second drive (B) 
                     
              \t/      
               w       If your cable does not have this twist,
            i       then drive A must have the Drive Select
            s       jumper in the first position.
           /t\      
                   
  Connected to the 
  first drive (A)  
                   

Drive Some, but not all diskette drives have a double row of pins
Select (usually four sets) with a jumper across one set.  The jumper
should be across the second set for both diskette drives.

If you can see any printing on the circuit board, you can usually
figure out which is the side with the first position (D0 or
pin 1, etc.).  Or you can tell the end with pin 1 by looking at
the back of the controller.  It is the side that has a square
solder mark.

DiskChng A few drives let you choose whether the drive should
Jumper detect when the drive door has been opened (indicating the
likelihood that a disk has been swapped).

DOS device drivers have supported Disk Change or "change line"
for many years, and you should enable this feature (usually by
placing the jumper).

If DOS thinks that the drive does detect Disk Change, but it
actually does not, then DOS may not be able to tell when a new
diskette is inserted in the drive (for instance, the Dir command
will show the directory of the previous diskette).  This is
dangerous.

  Controller Card Connection  
Many controller cards support both hard disk and diskettes.  Be sure to
connect the disketted drive cable to the pin-set marked FDD or floppy
disk.

Cables often have a plug to match a missing pin, to ensure the proper
orientation.

The side of the cable that has a colored wire is the one to connect to
pin 1.  To locate pin 1 on the controller, try:

  Look for a 1 printed on the circuit board.  Or...
  If there is a square solder mark on the back side of the controller
where the pins are connected, this is pin 1. Or...
  Refer to your controller documentation.

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Diskette Drive Connectors and Cables