SONY CORPORATION
================

   CDU-31A ADAPTER BOARD

   Card Type               CD-ROM drive controller card           
   Chipset                 Unidentified                           
   Maximum onboard memory  Unidentified                           
   I/O options             CD-ROM audio in, line out              
   Hard Drives supported   None                                   
   Floppy drives supported None                                   
   Data Bus                8-bit ISA                              
   Card Size               Half-length, full-height card          

<gopher://bitreich.org/I/th99/c/S-T/21722-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |     Function      | Location |     Function     | Location |
   |-------------------+----------+------------------+----------|
   | 34-pin            |   CN1    | Line out         |   CN3    |
   | proprietary       |          |                  |          |
   | CD-ROM interface  |          |                  |          |
   | - internal        |          |                  |          |
   |-------------------+----------+------------------+----------|
   | Audio in - CD-ROM |   CN2    | 50-pin           |   CN4    |
   |                   |          | proprietary      |          |
   |                   |          | CD-ROM connector |          |
   |                   |          | - external       |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Function                | Label | Position  |
   |----------------------------------------+-------+-----------|
   |>> | Factory configured - do not alter  | JP1/C | Reserved  |
   |---+------------------------------------+-------+-----------|
   |>> | Factory configured - do not alter  | JP1/D | Reserved  |
   |---+------------------------------------+-------+-----------|
   |>> | Factory configured - do not alter  | JP2/D | Reserved  |
   |---+------------------------------------+-------+-----------|
   |>> | Factory configured - do not alter  | JP3/D | Reserved  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   DMA CHANNEL SELECTION                    |
   |------------------------------------------------------------|
   | Channel | JP2/A  | JP2/B  | JP2/C  | JP3/A | JP3/B | JP3/C |
   |---------+--------+--------+--------+-------+-------+-------|
   |    1    |   On   |  Off   |  Off   |  On   |  Off  |  Off  |
   |---------+--------+--------+--------+-------+-------+-------|
   |    2    |  Off   |   On   |  Off   |  Off  |  On   |  Off  |
   |---------+--------+--------+--------+-------+-------+-------|
   |    3    |  Off   |  Off   |   On   |  Off  |  Off  |  On   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    INTERRUPT SELECTION                     |
   |------------------------------------------------------------|
   |    IRQ     |   JP4/A   |   JP4/B   |   JP4/C   |   JP4/D   |
   |------------+-----------+-----------+-----------+-----------|
   |     3      |    Off    |    Off    |    On     |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |     4      |    Off    |    On     |    Off    |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |     5      |    On     |    Off    |    Off    |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |     6      |    Off    |    On     |    Off    |    Off    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 BASE I/O ADDRESS SELECTION                 |
   |------------------------------------------------------------|
   |      Address       |       JP1/A       |       JP1/B       |
   |--------------------+-------------------+-------------------|
   |        320h        |      Closed       |      Closed       |
   |--------------------+-------------------+-------------------|
   |        330h        |      Closed       |       Open        |
   |--------------------+-------------------+-------------------|
   |        340h        |       Open        |      Closed       |
   |--------------------+-------------------+-------------------|
   |        360h        |       Open        |       Open        |
   +------------------------------------------------------------+