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

   WD1002-FOX

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:     | 8-bit, ISA                                 |
   |---------------+--------------------------------------------|
   | Size:         | Half-length, half-height card              |
   |---------------+--------------------------------------------|
   | Hard drive    | N/A                                        |
   | supported:    |                                            |
   |---------------+--------------------------------------------|
   | Floppy drives | Two 360KB, 1.2MB drives or floppy tape     |
   | supported:    | drives                                     |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/U-Z/20684-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                 Function                 |    Location     |
   |------------------------------------------+-----------------|
   | 34-pin connector - floppy drive internal |       CN1       |
   |------------------------------------------+-----------------|
   | 37-pin floppy disk drive port - external |       CN2       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   | Factory configured setting - do    |    W3    | pins 1 & 2 |
   | not alter                          |          |   closed   |
   |------------------------------------+----------+------------|
   | Factory configured setting - do    |    W4    | pins 2 & 3 |
   | not alter                          |          |   closed   |
   |------------------------------------+----------+------------|
   | Optional BIOS - enabled            |    W5    | pins 1 & 2 |
   |                                    |          |   closed   |
   |------------------------------------+----------+------------|
   | Optional BIOS - disabled           |    W5    | pins 2 & 3 |
   |                                    |          |   closed   |
   |------------------------------------+----------+------------|
   | Controller grounded to chassis     |    W6    | pins 1 & 2 |
   |                                    |          |   closed   |
   |------------------------------------+----------+------------|
   | Controller not grounded            |    W6    | pins 2 & 3 |
   |                                    |          |   closed   |
   |------------------------------------+----------+------------|
   | Dual speed spindle option -        |    W7    |   closed   |
   | enabled                            |          |            |
   |------------------------------------+----------+------------|
   | Dual speed spindle option -        |    W7    |    open    |
   | disabled                           |          |            |
   |------------------------------------+----------+------------|
   | Precompensation set to 187nsec     |    W8    |   closed   |
   |------------------------------------+----------+------------|
   | Precompensation set to 125nsec     |    W8    |    open    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRIVE POWER SELECT                     |
   |------------------------------------------------------------|
   |         Setting         |    W9     |    W10    |   W11    |
   |-------------------------+-----------+-----------+----------|
   | Power supplied by host  |  closed   |  closed   |  closed  |
   |-------------------------+-----------+-----------+----------|
   | Power supplied by drive |   open    |   open    |   open   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        BIOS ADDRESS                        |
   |------------------------------------------------------------|
   |     Address     |          W1          |        W2         |
   |-----------------+----------------------+-------------------|
   |  EF000 - EEFFF  |  pins 2 & 3 closed   | pins 2 & 3 closed |
   |-----------------+----------------------+-------------------|
   |  ED000 - ECFFF  |  pins 2 & 3 closed   | pins 1 & 2 closed |
   |-----------------+----------------------+-------------------|
   |  CF000 - CEFFF  |  pins 1 & 2 closed   | pins 2 & 3 closed |
   |-----------------+----------------------+-------------------|
   |  CD000 - CCFFF  |  pins 1 & 2 closed   | pins 1 & 2 closed |
   |------------------------------------------------------------|
   | Note: If W1 & W2 are removed this will disable the BIOS    |
   | regardless of the setting of W5.                           |
   +------------------------------------------------------------+