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

   ISA-S486B

   Processor         80486SX/80486DX/80486DX2                     
   Processor Speed   16/20/25/33/50(internal)/50MHz               
   Chip Set          Symphony                                     
   Max. Onboard DRAM 32MB                                         
   Cache             64/128/256KB                                 
   BIOS              AMI                                          
   Dimensions        330mm x 218mm                                
   I/O Options       None                                         
   NPU Options       None                                         

<gopher://bitreich.org/I/th99/m/U-Z/32589-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose             | Location | Purpose        | Location |
   |---------------------+----------+----------------+----------|
   | Power LED & keylock |   JP5    | Speaker        |   JP16   |
   |---------------------+----------+----------------+----------|
   | Turbo switch        |   JP10   | Reset switch   |   JP19   |
   |---------------------+----------+----------------+----------|
   | Turbo LED           |   JP11   |                |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function                | Jumper  | Position |
   |---------------------------------------+---------+----------|
   |>> | Factory configured - do not alter |   JP1   |   N/A    |
   |---+-----------------------------------+---------+----------|
   |>> | Factory configured - do not alter |   JP2   |   N/A    |
   |---+-----------------------------------+---------+----------|
   |>> | Factory configured - do not alter |   JP3   |   N/A    |
   |---+-----------------------------------+---------+----------|
   |>> | Monitor type select color         |   JP6   |  Closed  |
   |---+-----------------------------------+---------+----------|
   |   | Monitor type select monochrome    |   JP6   |   Open   |
   |---+-----------------------------------+---------+----------|
   |>> | Factory configured - do not alter |   JP8   |   N/A    |
   |---+-----------------------------------+---------+----------|
   |>> | Factory configured - do not alter |   JP9   |   N/A    |
   |---+-----------------------------------+---------+----------|
   |>> | Factory configured - do not alter |  JP33   |   N/A    |
   |---+-----------------------------------+---------+----------|
   |>> | Factory configured - do not alter |  JP35   |   N/A    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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) 1M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       5MB        |    (4) 256K x 9    |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       17MB       |     (4) 4M x 9     |    (4) 256K x 9    |
   |------------------+--------------------+--------------------|
   |       17MB       |    (4) 256K x 9    |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 4M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       20MB       |     (4) 1M x 9     |     (4) 4M x 9     |
   |------------------+--------------------+--------------------|
   |       32MB       |     (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  |      JP22       |      JP23       |      JP34      |
   |-------+-----------------+-----------------+----------------|
   | 64KB  |   pins 1 & 2    |   pins 1 & 2    |   pins 1 & 2   |
   |       |     closed      |     closed      |     closed     |
   |-------+-----------------+-----------------+----------------|
   | 128KB |   pins 1 & 2    |   pins 1 & 2    |   pins 1 & 2   |
   |       |     closed      |     closed      |     closed     |
   |-------+-----------------+-----------------+----------------|
   | 256KB |   pins 2 & 3    |   pins 2 & 3    |   pins 2 & 3   |
   |       |     closed      |     closed      |     closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             CACHE JUMPER CONFIGURATION (CON'T)             |
   |------------------------------------------------------------|
   | Size  |          JP100           |          JP101          |
   |-------+--------------------------+-------------------------|
   | 64KB  |  pins 1 & 3, 5 & 7, 9 &  | pins 1 & 3, 5 & 7, 9 &  |
   |       |    11, 13 & 15 closed    |   11, 13 & 15 closed    |
   |-------+--------------------------+-------------------------|
   | 128KB | pins 2 & 4, 6 & 8, 10 &  | pins 2 & 4, 6 & 8, 10 & |
   |       |    12, 14 & 16 closed    |   12, 14 & 16 closed    |
   |-------+--------------------------+-------------------------|
   | 256KB |  pins 1 & 3, 5 & 7, 9 &  | pins 1 & 3, 5 & 7, 9 &  |
   |       |    11, 13 & 15 closed    |   11, 13 & 15 closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |     Type     |    JP12    |       JP13        |    JP14    |
   |--------------+------------+-------------------+------------|
   |   80486SX    |    Open    | pins 2 & 3 closed |    Open    |
   |--------------+------------+-------------------+------------|
   |   80486DX    |   Closed   | pins 1 & 2 closed |   Closed   |
   +------------------------------------------------------------+