2.5" hard disk connector external view.


	4 4 3 3 3 3 3 2 2 2 2 2 1 1 1 1 1 
	3 1 9 7 5 3 1 9 7 5 3 1 9 7 5 3 1 9 7 5 3 1   A C
	o o o o o o o o o o o o o o o o o o o o o o   o o
	o o o o o o o o o o o o o o o o o o o o o o   o o
	4 4 4 3 3 3 3 3 2 2 2 2 2 1 1 1 1 1 8 6 4 2
	4 2 0 8 6 4 2 0 8 6 4 2 0 8 6 4 2 0 	      B D
                        X


    	X-keypin (pin absent)

	pin 1-40 normal (3.5") IDE (see below)
	pin 41 & 42 +5V DC
	pin 43  GND
	pin 44  DISK ENABLE (in female connector connected to pins 41 and 42)

	pins A,B,C,D master/slave setting    

	No jumpered	DEVICE 0 (some IBM drives DEVICE 1)
	C&D jumpered	DEVICE 1 (some IBM drives DEVICE 0)
	B&D jumpered	CABLE SELECT
	

  	  IDE CONNECTOR PINOUT
	------------------------- 
	 1   *RESET       2   GND
	 3   D7           4   D8
	 5   D6           6   D9
	 7   D5           8   D10
	 9   D4          10   D11
	11   D3          12   D12
	13   D2          14   D13
	15   D1          16   D14
	17   D0          18   D15
	19   GND         20   (keypin)
	21   DMARQ       22   GND
	23   *IOW        24   GND
	25   *IOR        26   GND
	27   IORDY       28   CSEL
	29   DMACK       30   GND
	31   INTRQ       32   IOCS16
	33   A1          34   PDIAG
	35   A0          36   A2
	37   *CS1FX      38   *CS3FX
	39   *DASP       40   GND

 Pins 3, 21, and 27 each need a 10K pulldown to GND.
 Pin 28 needs a 10K pullup to VCC.         
 Pins 20, 29, 32, and 34 are no connection.