SEANIX TECHNOLOGY, INC.
=======================

   SB-SYM-486C

   Processor         80486SX/80486DX                              
   Processor Speed   16/20/25/33/50MHz                            
   Chip Set          Symphony                                     
   Max. Onboard DRAM 32MB                                         
   Cache             64/128/256KB                                 
   BIOS              AMI                                          
   Dimensions        330mm x 218mm                                
   I/O Options       None                                         
   NPU Options       4167                                         

<gopher://bitreich.org/I/th99/m/S-T/32450-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose           |  Location   | Purpose      | Location  |
   |-------------------+-------------+--------------+-----------|
   | Power LED &       |     J19     | Turbo switch | J21 (pins |
   | keylock           |             |              |  3 & 4)   |
   |-------------------+-------------+--------------+-----------|
   | Speaker           |     J20     | Reset switch |    J22    |
   |-------------------+-------------+--------------+-----------|
   | Turbo LED         | J21 (pins 1 |              |           |
   |                   |    & 2)     |              |           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | Monitor type select color        |   W2   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select monochrome   |   W2   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |   W3   |    Open    |
   |   | alter                            |        |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       1MB        |    (4) 256K x 9    |        NONE        |
   |------------------+--------------------+--------------------|
   |       2MB        |    (4) 256K x 9    |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       3MB        |     (4) 1M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       4MB        |     (4) 1M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       4MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       5MB        |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       6MB        |     (4) 4M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       7MB        |     (4) 4M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |    Bank 0     |    Bank 1     |      TAG      |
   |------------+---------------+---------------+---------------|
   |    64KB    |  (4) 8K x 8   |  (4) 8K x 8   |  (1) 8K x 8   |
   |------------+---------------+---------------+---------------|
   |   128KB    |  (4) 32K x 8  |     NONE      |  (1) 8K x 8   |
   |------------+---------------+---------------+---------------|
   |   256KB    |  (4) 32K x 8  |  (4) 32K x 8  |  (1) 32K x 8  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |   Size   |    W4    |    W5    |   W6    |   W7   |   W8   |
   |----------+----------+----------+---------+--------+--------|
   |   64KB   |  2 & 3   |   Open   |  1 & 2  | 1 & 2  | 2 & 3  |
   |----------+----------+----------+---------+--------+--------|
   |  128KB   |  1 & 2   |  1 & 2   |  1 & 2  | 1 & 2  | 1 & 2  |
   |----------+----------+----------+---------+--------+--------|
   |  256KB   |  2 & 3   |  2 & 3   |  2 & 3  | 2 & 3  | 2 & 3  |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             CACHE JUMPER CONFIGURATION (CON'T)             |
   |------------------------------------------------------------|
   |   Size   |    W9    |   W15    |   W17   |  W19   |  W20   |
   |----------+----------+----------+---------+--------+--------|
   |   64KB   |  1 & 2   |  2 & 3   |  2 & 3  | 2 & 3  | 2 & 3  |
   |----------+----------+----------+---------+--------+--------|
   |  128KB   |  2 & 3   |  1 & 2   |  1 & 2  | 1 & 2  | 1 & 2  |
   |----------+----------+----------+---------+--------+--------|
   |  256KB   |  2 & 3   |  2 & 3   |  2 & 3  | 2 & 3  | 2 & 3  |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             CACHE JUMPER CONFIGURATION (CON'T)             |
   |------------------------------------------------------------|
   |                Setting                 |        W21        |
   |----------------------------------------+-------------------|
   |  Cache installed (shows size at boot   | pins 1 & 2 closed |
   |                  up)                   |                   |
   |----------------------------------------+-------------------|
   | Cache installed (does not show size at | pins 1 & 2 closed |
   |                boot up)                |                   |
   |----------------------------------------+-------------------|
   |          Cache not installed           | pins 2 & 3 closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |  Type   |      W13       |      W14       |      W18       |
   |---------+----------------+----------------+----------------|
   | 80486SX |   pins 2 & 3   |   pins 2 & 3   |   pins 2 & 3   |
   |         |     closed     |     closed     |     closed     |
   |---------+----------------+----------------+----------------|
   | 80486DX |   pins 1 & 2   |   pins 1 & 2   |   pins 1 & 2   |
   |         |     closed     |     closed     |     closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |  Speed   |    W1    |   W10    |   W11   |  W12   |  W16   |
   |----------+----------+----------+---------+--------+--------|
   |  16MHz   |  1 & 2   |  1 & 2   |  2 & 3  | 2 & 3  | 2 & 3  |
   |----------+----------+----------+---------+--------+--------|
   |  20MHz   |  1 & 2   |  1 & 2   |  2 & 3  | 2 & 3  | 2 & 3  |
   |----------+----------+----------+---------+--------+--------|
   |  25MHz   |  1 & 2   |  1 & 2   |  2 & 3  | 2 & 3  | 2 & 3  |
   |----------+----------+----------+---------+--------+--------|
   |  33MHz   |  1 & 2   |  1 & 2   |  2 & 3  | 2 & 3  | 2 & 3  |
   |----------+----------+----------+---------+--------+--------|
   |  50MHz   |  2 & 3   |  2 & 3   |  1 & 2  | 1 & 2  | 1 & 2  |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+