COMPUSYSTEMS, INC.
==================

   PEARL 4900

   Processor            80386DX                                   
   Processor Speed      33/40MHz                                  
   Chip Set             SIS                                       
   Max. Onboard DRAM    32MB                                      
   Cache                64/128/256KB                              
   BIOS                 AMI                                       
   Dimensions           330mm x 214mm                             
   I/O Options          None                                      
   NPU Options          80387/3167                                

<gopher://bitreich.org/I/th99/m/C-D/30041-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose             | Location | Purpose        | Location |
   |---------------------+----------+----------------+----------|
   | External battery    |   J10    | Speaker        |   J24    |
   |---------------------+----------+----------------+----------|
   | Turbo LED           |   J22    | Reset switch   |   SW1    |
   |---------------------+----------+----------------+----------|
   | Power LED & Keylock |   J23    | Turbo switch   |   SW2    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Jumper |  Position  |
   |--------------------------------------+--------+------------|
   |>> | Monitor type select monochrome   |  JP1   |    Open    |
   |---+----------------------------------+--------+------------|
   |   | Monitor type select color        |  JP1   |   Closed   |
   |---+----------------------------------+--------+------------|
   |>> | CMOS memory normal operation     |  JP2   | pins 2 & 3 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |   | CMOS memory clear                |  JP2   | pins 1 & 2 |
   |   |                                  |        |   closed   |
   |---+----------------------------------+--------+------------|
   |>> | Bus speed select ATCLK/6         |  JP3   |    Open    |
   |---+----------------------------------+--------+------------|
   |   | Bus speed select ATCLK/8         |  JP3   |   Closed   |
   |---+----------------------------------+--------+------------|
   |>> | Factory configured - do not      |  JP10  | pins 1 & 2 |
   |   | alter                            |        |   closed   |
   |------------------------------------------------------------|
   | Note:The location of JP3 is unidentified.                  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     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     |
   |------------------+--------------------+--------------------|
   |       8MB        |     (4) 1M x 9     |     (4) 1M x 9     |
   |------------------+--------------------+--------------------|
   |       16MB       |     (4) 4M x 9     |        NONE        |
   |------------------+--------------------+--------------------|
   |       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   |  (3) 16K x 4  |
   |------------+---------------+---------------+---------------|
   |   128KB    |  (4) 32K x 8  |     NONE      |  (3) 16K x 4  |
   |------------+---------------+---------------+---------------|
   |   256KB    |  (4) 32K x 8  |  (4) 32K x 8  |  (3) 16K x 4  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |   Size   |   JP5    |   JP6    |  JP7   |   JP8   |  JP9   |
   |----------+----------+----------+--------+---------+--------|
   |   64KB   |  2 & 3   |  1 & 2   | 1 & 2  |  Open   | 2 & 3  |
   |----------+----------+----------+--------+---------+--------|
   |  128KB   |  2 & 3   |  1 & 2   | 2 & 3  | Closed  | 2 & 3  |
   |----------+----------+----------+--------+---------+--------|
   |  256KB   |  2 & 3   |  2 & 3   | 2 & 3  | Closed  | 1 & 2  |
   |------------------------------------------------------------|
   | Note: Pins designated should be in the closed position.    |
   +------------------------------------------------------------+