View source

{{todo}}

Signals and voltages are transferred between the system board and the diskette drives by a cable or printed circuit board. The printed-circuit board provides a 2- by 20-pin card edge connector for each diskette drive, with a locator key between pins 34 and 36. The cable interface provides a 2 x 17-pin header connector to each diskette drive, with a locator key below pin 17. ) The following figures show the signals and DC voltages for each diskette drive connector type:

== Pinout ==

40-Pin Card-Edge connector

 Pin Signal     Pin Signal
  1  Ground      2  -High Density Select
  3  Reserved    4  Reserved
  5  Ground      6  Reserved
  7  Ground      8  -Index
  9  Ground     10  Reserved
 11  Ground     12  -Drive Select
 13  Ground     14  Reserved
 15  Ground     16  -Motor Enable
 17  Ground     16  -Direction In
 19  Ground     20  -Step
 21  Ground     22  -Write Data
 23  Ground     24  -Write Enable
 25  Ground     26  -Track 0
 27  Ground     28  -Write Protect
 29  Ground     30  -Read Data
 31  Ground     32  -Head 1 Select
 33  Ground     34  -Diskette Change
 35  Ground     36  Ground
 37  Ground     38  +5VDC
 39  Ground     40  +12VDC

== Sources ==
* [http://ohlandl.ipv7.net/floppy/Floppy_Pinouts.html Floppy Drive Pinouts] by Louis F. Ohland III
* PS/2 3.5-inch Diskette Drives Technical Reference (S42G-2194-00), 2nd Ed., Oct 1992, pages 10-12.

[[Category:Connector]]
[[Category:Diskdrive]]