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

   486SC-H

   Processor         80486SX/80487SX/80486DX/80486DX2             
   Processor Speed   20/25/33/50(internal)MHz                     
   Chip Set          Unidentified                                 
   Max. Onboard DRAM 32MB                                         
   Cache             32/128KB                                     
   BIOS              AMI                                          
   Dimensions        220mm x 220mm                                
   I/O Options       None                                         
   NPU Options       4167                                         

<gopher://bitreich.org/I/th99/m/U-Z/32568-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose        | Location | Purpose             | Location |
   |----------------+----------+---------------------+----------|
   | Turbo LED      |    J1    | Speaker             |    J4    |
   |----------------+----------+---------------------+----------|
   | Turbo switch   |    J2    | Power LED & keylock |    J5    |
   |----------------+----------+---------------------+----------|
   | Reset switch   |    J3    |                     |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | CPU clock speed select 1x        |   J8   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CPU clock speed select 2x        |   J8   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Monitor type select              |   J9   |    Open    |
   |   | monochrome/EGA/VGA               |        |            |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select color        |   J9   |   Closed   |
   |---+----------------------------------+--------+------------|
   |>> | Cache wait state select 1 wait   |  J12   |    Open    |
   |   | state                            |        |            |
   |---+----------------------------------+--------+------------|
   |   | Cache wait state select 0 wait   |  J12   | pins 3 & 4 |
   |   | states                           |        |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |       Bank 1       |
   |------------------+--------------------+--------------------|
   |       1MB        |    (4) 256K x 9    |        NONE        |
   |------------------+--------------------+--------------------|
   |       2MB        |    (4) 256K x 9    |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       4MB        |     (4) 1M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       5MB        |    (4) 256K x 9    |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       5MB        |     (4) 1M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       17MB       |    (4) 256K x 9    |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       17MB       |     (4) 4M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 1M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 4M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (4) 4M x 9     |     (4) 4M x 9     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |       Size       |       Bank 0       |        TAG         |
   |------------------+--------------------+--------------------|
   |       32KB       |     (4) 8K x 8     |     (1) 8K x 8     |
   |------------------+--------------------+--------------------|
   |      128KB       |    (4) 32K x 8     |     (1) 8K x 8     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size  |     JS1     |    JS2     |    JS3     |    JS4     |
   |-------+-------------+------------+------------+------------|
   | 32KB  | pins 1 & 2  | pins 1 & 2 | pins 1 & 2 | pins 1 & 2 |
   |       |   closed    |   closed   |   closed   |   closed   |
   |-------+-------------+------------+------------+------------|
   | 128KB | pins 2 & 3  | pins 2 & 3 | pins 2 & 3 | pins 2 & 3 |
   |       |   closed    |   closed   |   closed   |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |            Type            |              J7               |
   |----------------------------+-------------------------------|
   |          80486SX           |       pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |          80487SX           |       pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |          80486DX           |       pins 2 & 3 closed       |
   |----------------------------+-------------------------------|
   |          80486DX2          |       pins 2 & 3 closed       |
   +------------------------------------------------------------+