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

   486WB CACHE

   Processor             80486SX/80487SX/80486DX                  
   Processor Speed       25/33MHz                                 
   Chip Set              OPTI                                     
   Max. Onboard DRAM     64MB                                     
   Cache                 64/128/256/512KB                         
   BIOS                  AMI                                      
   Dimensions            330mm x 218mm                            
   I/O Options           None                                     
   NPU Options           4167                                     

<gopher://bitreich.org/I/th99/m/U-Z/30663-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose             | Location | Purpose        | Location |
   |---------------------+----------+----------------+----------|
   | Speaker             |    J3    | Turbo switch   |   JP18   |
   |---------------------+----------+----------------+----------|
   | External battery    |    J7    | Turbo LED      |   JP20   |
   |---------------------+----------+----------------+----------|
   | Power LED & keylock |    J8    | Reset switch   |   JP21   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | CPU speed select forced high     |  JP18  |   Closed   |
   |---+----------------------------------+--------+------------|
   |   | CPU speed select switchable at   |  JP18  |    Open    |
   |   | keyboard                         |        |            |
   |---+----------------------------------+--------+------------|
   |>> | Power good signal detect from    |  JP23  | pins 1 & 2 |
   |   | power supply                     |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Power good signal detect from    |  JP23  | pins 2 & 3 |
   |   | board                            |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |  JP24  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |  JP24  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Monitor type select color        |  JP25  | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select monochrome   |  JP25  | pins 1 & 2 |
   |   |                                  |        |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size |   Bank 0    |   Bank 1    |   Bank 2   |   Bank 3   |
   |------+-------------+-------------+------------+------------|
   | 1MB  | (4) 256K x  |    NONE     |    NONE    |    NONE    |
   |      |      9      |             |            |            |
   |------+-------------+-------------+------------+------------|
   | 2MB  | (4) 256K x  | (4) 256K x  |    NONE    |    NONE    |
   |      |      9      |      9      |            |            |
   |------+-------------+-------------+------------+------------|
   | 4MB  | (4) 1M x 9  |    NONE     |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 5MB  | (4) 256K x  | (4) 1 M x 9 |    NONE    |    NONE    |
   |      |      9      |             |            |            |
   |------+-------------+-------------+------------+------------|
   | 6MB  | (4) 256K x  | (4) 256K x  | (4) 1M x 9 |    NONE    |
   |      |      9      |      9      |            |            |
   |------+-------------+-------------+------------+------------|
   | 8MB  | (4) 1M x 9  | (4) 1M x 9  |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 9MB  | (4) 256K x  | (4) 1M x 9  | (4) 1M x 9 |    NONE    |
   |      |      9      |             |            |            |
   |------+-------------+-------------+------------+------------|
   | 10MB | (4) 256K x  | (4) 256K x  | (4) 1M x 9 | (4) 1M x 9 |
   |      |      9      |      9      |            |            |
   |------+-------------+-------------+------------+------------|
   | 12MB | (4) 1M x 9  | (4) 1M x 9  | (4) 1M x 9 |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 13MB | (4) 256K x  | (4) 1M x 9  | (4) 1M x 9 | (4) 1M x 9 |
   |      |      9      |             |            |            |
   |------+-------------+-------------+------------+------------|
   | 16MB | (4) 1M x 9  | (4) 1M x 9  | (4) 1M x 9 | (4) 1M x 9 |
   |------+-------------+-------------+------------+------------|
   | 16-B | (4) 4M x 9  |    NONE     |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 20MB | (4) 1M x 9  | (4) 4M x 9  |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 24MB | (4) 1M x 9  | (4) 1M x 9  | (4) 4M x 9 |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 28MB | (4) 1M x 9  | (4) 1M x 9  | (4) 4M x 9 | (4) 1M x 9 |
   |------+-------------+-------------+------------+------------|
   | 32MB | (4) 4M x 9  | (4) 4M x 9  |    NONE    |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 36MB | (4) 1M x 9  | (4) 4M x 9  | (4) 4M x 9 |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 40MB | (4) 1M x 9  | (4) 4M x 9  | (4) 4M x 9 | (4) 1M x 9 |
   |------+-------------+-------------+------------+------------|
   | 48MB | (4) 4M x 9  | (4) 4M x 9  | (4) 4M x 9 |    NONE    |
   |------+-------------+-------------+------------+------------|
   | 52MB | (4) 4M x 9  | (4) 4M x 9  | (4) 4M x 9 | (4) 1M x 9 |
   |------+-------------+-------------+------------+------------|
   | 64MB | (4) 4M x 9  | (4) 4M x 9  | (4) 4M x 9 | (4) 4M x 9 |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size  |   Bank 0    |   Bank 1   |   Bank 2   |   Bank 3   |
   |-------+-------------+------------+------------+------------|
   | 64KB  | (4) 8K x 8  | (4) 8K x 8 |    NONE    |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 128KB | (4) 8K x 8  | (4) 8K x 8 | (4) 8K x 8 | (4) 8K x 8 |
   |-------+-------------+------------+------------+------------|
   | 256KB | (4) 32K x 8 | (4) 32K x  |    NONE    |    NONE    |
   |       |             |     8      |            |            |
   |-------+-------------+------------+------------+------------|
   | 512KB | (4) 32K x 8 | (4) 32K x  | (4) 32K x  | (4) 32K x  |
   |       |             |     8      |     8      |     8      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CACHE TAG CONFIGURATION                   |
   |------------------------------------------------------------|
   |    Size    |      U27      |      U36      |      U37      |
   |------------+---------------+---------------+---------------|
   |    64KB    |  (1) 8K x 8   |  (1) 16K x 8  |     NONE      |
   |------------+---------------+---------------+---------------|
   |   128KB    |  (1) 8K x 8   |  (1) 16K x 8  |     NONE      |
   |------------+---------------+---------------+---------------|
   |   256KB    |  (1) 32K x 8  |     NONE      |  (1) 64K x 8  |
   |------------+---------------+---------------+---------------|
   |   512KB    |  (1) 32K x 8  |     NONE      |  (1) 64K x 8  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |   Size   |   JP9    |   JP10   |  JP11   |  JP12  |  JP13  |
   |----------+----------+----------+---------+--------+--------|
   |   64KB   |  2 & 3   |  2 & 3   |  2 & 3  | 2 & 3  | 2 & 3  |
   |----------+----------+----------+---------+--------+--------|
   |  128KB   |  1 & 2   |  1 & 2   |  2 & 3  | 2 & 3  | 2 & 3  |
   |----------+----------+----------+---------+--------+--------|
   |  256KB   |  1 & 2   |  1 & 2   |  1 & 2  | 2 & 3  | 2 & 3  |
   |----------+----------+----------+---------+--------+--------|
   |  512KB   |  1 & 2   |  1 & 2   |  1 & 2  | 1 & 2  | 1 & 2  |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |  Type   |      JP1       |      JP2       |      JP3       |
   |---------+----------------+----------------+----------------|
   | 80486SX |   pins 2 & 3   |   pins 2 & 3   |      Open      |
   |         |     closed     |     closed     |                |
   |---------+----------------+----------------+----------------|
   | 80487SX |   pins 1 & 2   |   pins 1 & 2   |   pins 1 & 2   |
   |         |     closed     |     closed     |     closed     |
   |---------+----------------+----------------+----------------|
   | 80486DX |   pins 1 & 2   |   pins 1 & 2   |   pins 2 & 3   |
   |         |     closed     |     closed     |     closed     |
   +------------------------------------------------------------+