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

   WDAT-440

   +------------------------------------------------------------+
   +------------------------------------------------------------+

   Data bus: 16-bit, PC/AT

   Size: Half-length, full-height card

   Hard drives supported:  Two IDE (AT) Interface drives

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

   Special features: Two serial and one parallel port

<gopher://bitreich.org/I/th99/c/U-Z/20235-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                    Function                     | Location |
   |-------------------------------------------------+----------|
   | 34-pin data cable connector-floppy drive        |    J1    |
   |-------------------------------------------------+----------|
   | 25-pin parallel port-external                   |    J2    |
   |-------------------------------------------------+----------|
   | 40-pin IDE (AT) Interface control cable         |    J5    |
   | connector-internal                              |          |
   |-------------------------------------------------+----------|
   | 4 pin connector drive- active LED               |    J6    |
   |-------------------------------------------------+----------|
   | 9-pin serial port-external                      |    J8    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    DIRQ14 SIGNAL SELECT                    |
   |------------------------------------------------------------|
   |               DIRQ               |     W3     |     W3     |
   |----------------------------------+------------+------------|
   |>> | DIRQ14 signal passed to host | pins 1 & 2 | pins 2 & 3 |
   |   | computer                     |    open    |   closed   |
   |---+------------------------------+------------+------------|
   |   | Conner CP342/CP3022 in true  | pins 1 & 2 | pins 2 & 3 |
   |   | IBM AT                       |   closed   |    open    |
   +------------------------------------------------------------+

   WESTERN DIGITAL CORPORATION

   WDAT-440

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function             |  Location   |  Setting   |
   |---------------------------------+-------------+------------|
   |>> | Floppy controller enabled   |     W4      |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | Floppy controller disabled  |     W4      |    open    |
   |---+-----------------------------+-------------+------------|
   |>> | Floppy drive port address   |     W4      |    open    |
   |   | is 3F0-3F7h                 |             |            |
   |---+-----------------------------+-------------+------------|
   |   | Floppy drive port address   |     W4      |   closed   |
   |   | is 370-377h                 |             |            |
   |---+-----------------------------+-------------+------------|
   |>> | Single speed floppy drive   |     W5      |    open    |
   |---+-----------------------------+-------------+------------|
   |   | Dual speed floppy drive     |     W5      |   closed   |
   |---+-----------------------------+-------------+------------|
   |>> | Logic ground independent of |     W6      |    open    |
   |   | chassis                     |             |            |
   |---+-----------------------------+-------------+------------|
   |   | Logic ground connected to   |     W6      |   closed   |
   |   | chassis                     |             |            |
   |---+-----------------------------+-------------+------------|
   |>> | Printer Interrupt is IRQ7   |     W7      | pins 3 & 4 |
   |   |                             |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | Printer Interrupt is IRQ5   |     W7      | pins 1 & 2 |
   |   |                             |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |>> | COM2 Interrupt is IRQ3      |     W7      | pins 5 & 6 |
   |   |                             |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | COM2 Interrupt is IRQ4      |     W7      | pins 5 & 7 |
   |   |                             |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | COM1 Interrupt is IRQ3      |     W7      | pins 6 & 8 |
   |   |                             |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | COM1 Interrupt is IRQ4      |     W7      | pins 7 & 8 |
   |   |                             |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |>> | Printer enabled             | W8/jumper 1 |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | Printer disabled            | W8/jumper 1 |    open    |
   |---+-----------------------------+-------------+------------|
   |>> | Printer address, LPT1 =     | W8/jumper 2 |    open    |
   |   | 378-37Fh                    |             |            |
   |---+-----------------------------+-------------+------------|
   |   | Printer address, LPT2 =     | W8/jumper 2 |   closed   |
   |   | 278-27Fh                    |             |            |
   |---+-----------------------------+-------------+------------|
   |>> | External Serial Port = COM1 | W8/jumper 3 |   closed   |
   |   | (3F8-3FFh)                  |             |            |
   |---+-----------------------------+-------------+------------|
   |   | External Serial Port = COM3 | W8/jumper 4 |   closed   |
   |   | (3E8-3EFh)                  |             |            |
   |---+-----------------------------+-------------+------------|
   |>> | Internal Serial Port = COM2 | W8/jumper 5 |   closed   |
   |   | (2F8-2FFh)                  |             |            |
   |---+-----------------------------+-------------+------------|
   |   | Internal Serial Port = COM4 | W8/jumper 6 |   closed   |
   |   | (2E8-2EFh)                  |             |            |
   |---+-----------------------------+-------------+------------|
   |>> | Enable intelligent drive    |     W9      |   closed   |
   |   | interface                   |             |            |
   |---+-----------------------------+-------------+------------|
   |   | Disable intelligent drive   |     W9      |    open    |
   |   | interface                   |             |            |
   +------------------------------------------------------------+