WESTERN DIGITAL CORPORATION

WD1003S-RAH

Data bus: 16-bit, ISA

Size: Half-length, full-height card

Hard drives supported: Two ST506/412 RLL drives

Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB drives

[Image]

                                CONNECTIONS

                     Function                             Location

  34-pin control cable connector-hard drives                 CN1

  20-pin data cable connector-Drive 0                        CN2

  20-pin data cable connector-Drive 1                        CN3

  34-pin data cable connector-secondary hard                 CN5
  drive (See JP7 settings)

  4-pin connector-drive active LED                           CN6

                        USER CONFIGURABLE SETTINGS

               Function                    Location           Setting

  »    Auto deselect enabled (PC/AT)          JP1            pins 1 & 2
                                                              closed

       Auto deselect disabled                 JP1              open
       (Compaq)

  »    Hard drive port address is             JP2              open
       1F0-1F7h & 3F0-3F7h

       Hard drive port address is             JP2             closed
       170-177h & 370-377h

  »    Drive 0 translation disabled           JP4            pins 1 & 2
                                                              closed

       Drive 0 translation enabled*           JP4            pins 2 & 3
                                                              closed

  »    Write Gate and drive select            JP5            pins 2 & 3
       lines are enabled only                                 closed

       when drive is accessed

       Write Gate and drive select            JP5            pins 1 & 2
       lines are disabled during                              closed
       power-up and when +5V is
       <+4.15V

  »    Drive 1 translation disabled           JP6            pins 1 & 2
                                                              closed

       Drive 1 translation enabled*           JP6            pins 2 & 3
                                                              closed

  »    Input tied high                        JP8            pins 1 & 2
                                                              closed

       Seek to LZ (663) on seek >             JP8            pins 2 & 3
       than 615. Step rate 0                                  closed

       (11 m m

  Note: Translates 4 x 615 x 26 to 6 x 615 x 17

                      DRIVE ATTACHMENT CONFIGURATION

               Function                                JP7

  Both drives daisy-chained from CN1,
  or Drive 0 is attached to CN1 and
  drive 1 is attached to CN5               pins 1 & 2 and 2 & 3 closed
                                                  (vertically)

  Drive 0 attached to CN5, Drive 1         pins 1 & 3 and 2 & 4 closed
  attached to CN1                                (horizontally)