WESTERN DIGITAL CORPORATION
===========================

   WD1002-WAH

    Data bus:                      16-bit, PC/AT                  

    Size:                          Full-length, full-height card  

    Hard drives supported:         Two MFM ST506/412 drives       

    Floppy drives supported:       None                           

<gopher://bitreich.org/I/th99/c/U-Z/20215-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                   Function                   |  Location   |
   |----------------------------------------------+-------------|
   | 34-pin control cable connector-hard drive    |     J1      |
   |----------------------------------------------+-------------|
   | 20-pin data cable connector-drive 0          |     J2      |
   |----------------------------------------------+-------------|
   | 20-pin data cable connector-drive 1          |     J3      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Hard drive port address is     |    W1    | pins 1 & 2 |
   |   | 1F0-1F7h;                      |          |   closed   |
   |   |                                |          |            |
   |   | Floppy drive port address is   |          |            |
   |   | 3F6-3F7h                       |          |            |
   |---+--------------------------------+----------+------------|
   |   | Hard drive port address is     |    W1    | pins 2 & 3 |
   |   | 170-177h;                      |          |   closed   |
   |   |                                |          |            |
   |   | Floppy drive port address is   |          |            |
   |   | 376-377h                       |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Auto deselect disabled         |    W2    | pins 2 & 3 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Auto deselect enabled          |    W2    | pins 1 & 2 |
   |   |                                |          |   closed   |
   +------------------------------------------------------------+