UNIDENTIFIED
============

   VGA GRAPHICS ADAPTER

   Category                     Video                             
   Video Types Supported        XVGA                              
   Video Processor              Trident TVGA 8900                 
   Highest Resolution Supported 1024 x768                         
   Data Bus Type                16-bit ISA                        
   Memory Type                  DRAM                              
   Maximum Onboard Memory       2MB                               

<gopher://bitreich.org/I/th99/v/U-Z/51114-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Purpose       | Location |    Purpose     | Location |
   |---------------------+----------+----------------+----------|
   | 15-pin analog video |   CN1    | 9-pin TTL port |   CN3    |
   | port                |          |                |          |
   |---------------------+----------+----------------+----------|
   | VGA feature         |   CN2    |                |          |
   | connector           |          |                |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         INTERRUPT                          |
   |------------------------------------------------------------|
   |           IRQ9             |              J1               |
   |----------------------------+-------------------------------|
   |>> |        Disabled        |       Pins 2 & 3 closed       |
   |---+------------------------+-------------------------------|
   |   |        Enabled         |       Pins 1 & 2 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       MONITOR SELECT                       |
   |------------------------------------------------------------|
   |         Setting          |     SW1/A      |     SW1/B      |
   |--------------------------+----------------+----------------|
   |           VBA            |       On       |       On       |
   |--------------------------+----------------+----------------|
   |           EGA            |      Off       |       On       |
   |--------------------------+----------------+----------------|
   |           CGA            |       On       |      Off       |
   |--------------------------+----------------+----------------|
   |       MDA/Hercules       |      Off       |      Off       |
   |------------------------------------------------------------|
   | Note:SW1/A & B affects 9-pin TTL connection. Not present   |
   | on all cards.                                              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        REFRESH RATE                        |
   |------------------------------------------------------------|
   |             Rate              |           SW1/C            |
   |-------------------------------+----------------------------|
   |        Less than 48MHz        |             On             |
   |-------------------------------+----------------------------|
   |           48-49MHz            |            Off             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       ADDRESS DECODE                       |
   |------------------------------------------------------------|
   |             Setting               |         SW1/E          |
   |-----------------------------------+------------------------|
   |>> |      Fast address decode      |          Off           |
   |---+-------------------------------+------------------------|
   |   |      Slow address decode      |           On           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      8/16 BUS SELECT                       |
   |------------------------------------------------------------|
   |            Setting             |           SW1/F           |
   |--------------------------------+---------------------------|
   |>> |           16-bit           |            Off            |
   |---+----------------------------+---------------------------|
   |   |           8-bit            |            On             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     BUS SIZE DETECTION                     |
   |------------------------------------------------------------|
   |            Setting            |             J2             |
   |-------------------------------+----------------------------|
   |          Autodetect           |     Pins 2 & 3 closed      |
   |-------------------------------+----------------------------|
   |      Standard interface       |     Pins 1 & 2 closed      |
   |------------------------------------------------------------|
   | Note: J2 orientation varies. Check pin numbers on card.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        CLOCK SPEED                         |
   |------------------------------------------------------------|
   |            Setting              |            J4            |
   |---------------------------------+--------------------------|
   |>>       |     40MHz(512KB)      |    Pins 2 & 3 closed     |
   |---------+-----------------------+--------------------------|
   |         |    48Mhz(1 & 2MB)     |    Pins 1 & 2 closed     |
   |------------------------------------------------------------|
   | Note: Location of J4 unidentified. Not present on all      |
   | cards.                                                     |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/v/U-Z/51114-2.png>
    J3

   +------------------------------------------------------------+
   |                         DRAM SIZE                          |
   |------------------------------------------------------------|
   |    Size    |     JP1     |     JP2     |        J3         |
   |------------+-------------+-------------+-------------------|
   |   512KB    |    Open     |   Closed    | Pins 1 & 2, 4 & 5 |
   |            |             |             |      closed       |
   |------------+-------------+-------------+-------------------|
   |    1MB     |    Open     |   Closed    | Pins 1 & 4, 2 & 5 |
   |            |             |             |      closed       |
   |------------+-------------+-------------+-------------------|
   |    2MB     |   Closed    |    Open     | Pins 2 & 3, 5 & 6 |
   |            |             |             |      closed       |
   |------------------------------------------------------------|
   |   Note: JP1 & 2 are jumper blocks, number of pins          |
   |   unidentified. Not present on all cards. Orientation of   |
   |   J3 unidentified                                          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |    Bank 2     |
   |------------+---------------+---------------+---------------|
   |   512KB    | (2)256KB x 4  |     None      |     None      |
   |------------+---------------+---------------+---------------|
   |    1MB     | (2)256KB x 4  | (2)256KB x 4  |     None      |
   |------------+---------------+---------------+---------------|
   |    2MB     | (2)256KB x 4  | (2)256KB x 4  | (4)256KB x 4  |
   |------------------------------------------------------------|
   | Note: DRAM not configurable on all cards.                  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                FACTORY CONFIGURED SETTINGS                 |
   |------------------------------------------------------------|
   |           Switch            |           Position           |
   |-----------------------------+------------------------------|
   |            SW1/D            |              On              |
   +------------------------------------------------------------+