STB SYSTEMS, INC.
=================

   POWERGRAPH VGA (VER. 2)

   Card Type                    Video                             
   Video Chip Set               Unidentified                      
   Highest Resolution Supported 1024 x 768                        
   Maximum Onboard Memory       1MB DRAM                          
   Data Bus                     16-bit ISA                        
   Video Types Supported        XVGA                              

<gopher://bitreich.org/I/th99/v/S-T/52239-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |        Function         | Label  |    Function     | Label |
   |-------------------------+--------+-----------------+-------|
   | 15-pin analog video     |   J5   | DAC chip socket |  U2   |
   | port                    |        |                 |       |
   |-------------------------+--------+-----------------+-------|
   | DAC chip                |   U1   |                 |       |
   |------------------------------------------------------------|
   |      Note: Either U1 or U2 should be installed, but not    |
   |      both.                                                 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Setting                | Label |  Position  |
   |---------------------------------------+-------+------------|
   |>> | Two wait state operation          |  J1   | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Zero wait state operation         |  J1   | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Card does not use IRQ2/9          |  J2   | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | Card uses IR/FONT                 |  J2   | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | Factory configured - do not alter |  J3   | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |>> | BIOS uses 8-bit I/O               |  J5   | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   |---+-----------------------------------+-------+------------|
   |   | BIOS uses 16-bit I/O              |  J5   | Pins 2 & 3 |
   |   |                                   |       |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                            DRAM                            |
   |------------------------------------------------------------|
   |      Note: This card may take 256KB, 512KB, or 1MB of      |
   |      on-board DRAM. The locations of the banks and the     |
   |      configurations of the chips in these banks is         |
   |      unidentified.                                         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     VERTICAL SCAN RATE                     |
   |------------------------------------------------------------|
   |    Resolution    |     Scan Rate      |         J4         |
   |------------------+--------------------+--------------------|
   |    640 x 480     |        60Hz        | Pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |    800 x 600     |        56Hz        | Pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |    1024 x 768    | 43Hz (interlaced)  | Pins 1 & 2 closed  |
   |------------------+--------------------+--------------------|
   |    640 x 480     |        72Hz        | Pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |    800 x 600     |        72Hz        | Pins 2 & 3 closed  |
   |------------------+--------------------+--------------------|
   |    1024 x 768    |        60Hz        | Pins 2 & 3 closed  |
   +------------------------------------------------------------+